GitHub - johannbarbie/BitcoindClient4J: A Json Rpc Client ...
Is there a way to run a full bitcoin JSON-RPC client without running a full node (downloading the full blockchain)?
Hi really dumb question here folks. I'm trying to figure out how to get a project to work which requires that I have a "JSON-RPC client" up and running. I know I can download the full blockchain then start bitcoind server to get this going. Can I just have a bitcoin.conf point at some server to have the same functionality? Thanks!
Our R&D Lab CoBloX just open-sourced our first libraries: a json rpc client, a bitcoin json rpc client and a docker library for testing. Everything written in Rust. Check it out here: https://github.com/coblox
Developers: Super-simple jQuery code for making JSON-RPC calls to Bitcoin Client
Running this code will access a wallet on the same machine. I haven't done much testing of different calls or error handling, but this should be enough to get you started. Replace RPC_USERNAME, RPC_PASSWORD, and RPC_PORT (usually 8332) with the data set in your bitcoin.conf file, and reference the API calls list to see what you can do. With a properly-configured server, I imagine you could change 127.0.0.1 to a URL or IP and access a web-based client. This code is 100% open and free for anyone to do whatever they want with it, obviously. No credit necessary. Consider it under a WTFPL License. I will kindly take Bitcoin donations, of course: 1KSEKy3XTRxJd7CqKciSsnx752VRaibBWr. Enjoy!
We’re seeing a bunch of interesting Rust blockchain and crypto projects, so this month the “Interesting Things” section is loaded up with news, papers, and project links. This month, Elrond, appeared on our radar with the launch of their mainnet. Although not written in Rust, it runs Rust smart contracts on its Arwen WASM VM, which itself is based on the Rust Wasmer VM. Along with NEAR, Nervos, and Enigma (and probably others), this continues an encouraging trend of blockchains enabling smart contracts in Rust. See the “Interesting Things” section for examples of Elrond’s Rust contracts. Rust continues to be popular for research into zero-knowledge proofs, with Microsoft releasing Spartan, a zk-SNARK system without trusted setup. In RiB news, we published a late one-year anniversary blog post. It has some reflection on the changes to, and growth of, RiB over the last year. The Awesome Blockchain Rust project, which is maintained by Sun under the rust-in-blockchain GitHub org, has received a stream of updates recently, and is now published as the Awesome-RiB page on rustinblockchain.org. It’s a pretty good resource for finding blockchain-related Rust projects, with links to many of the more prominent and mature projects noted in the RiB newsletter. It could use more eyes on it though.
What’s It Good For?. Lane’s take on the blockchain tech: “blockchain is very good at a narrow set of applications and pretty bad at just about everything else. When you get past the hype, it’s really just a slow, expensive, distributed, permissionless, append-only ledger, nothing more and nothing less.”
rust-fil-proofs. The Filecoin Proving Subsystem (or FPS) provides the storage proofs required by the Filecoin protocol. It is implemented entirely in Rust, as a series of partially inter-dependent crates – some of which export C bindings to the supported API.
Shuffler uses StarkWare’s VeeDo VDF to seed a seedable RNG, and shuffle a randomisable list of items.
Send ether from one account to another
Interact with smart contracts
Retrieve user account
It is open source
It is completely safe as it keeps private keys restricted to the clients
You can import and export using JSON wallets which again adds to the security feature
Import and export BIP 39 mnemonic phrases
You can connect to Ethereum nodes via JSON-RPC, MetaMask, INFURA, or Etherscan.
It is completely TypeScript ready
It offers complete functionality for all Ethereym needs
It has a huge collection of test cases
It has an MIT Licence.
Nano vs. Dogecoin - a tale of two cryptocurrency for microtransactions (& more)
So, I wanted to write here, because I think Nano community is open-minded, and can think it through - I really like it, and tho I don't have it (only tested it a few times from faucets). As I see both of those CCs are focusing mainly on low-cost payments and microtransaction/micropayments, and "fun to use". Even tho Dogecoin can be though as "meme" and "silly", it's actually used and adopted in many places - far more then Nano (ofc, it's also older and have easier codebase to implement - sharing it with bitcoin), but as I will outline, I think that there are a few things that Nano/Nano community can learn from them. Dogecoin:
no leader - it's the main thing that makes cryptocurrencies decentralized. There is no leader only participants that are driving the development and services
easy to implement codebase - Nano should think, about having some function (like JSON-RPC) similar to Bitcoin's - this way more services could implement it - maybe it is now, but it wasn't
more liquidity - a real winner in cryptocurrencies we can only see, by their behaviour in bear market - Doge is always around 25-35 position on cmc or coinpaprika, because it's really liquid - around 10-11M USD (or equivalent) is sitting in the order books of exchanges around the world (at the bottom I have added a comment, where I have compared it on actual data)
consistent output of 30-40K transactions per day - this is ofc related to better adoption (there is 0 stress tests on Doge)
almost 0 fees - these Nano have better, but Doge is also good in it - although there is a "default" fee of 1 Doge in standard client - you can set in reality as low as 1 sat/byte, so it's usually around 250-500 "dogetoshi" - neglible at best (6e-9 USD)
inflation - to be used as "money" it must be dispersed and spended, and to be spended - it must have a little inflation to encourage spending instead of hoarding. Currently Nano have quite stiff supply, which can hinder it's later growth, and will encourage mainly speculation (fixed supply assets always have rampant speculation and often end in pump and dumps, if they aren't needed or used for anything in real world)
decentralized nodes - 1K+ nodes
it has 0 fees - that's a huge plus for micropayments in any kind (although Natrium hinders it a little, giving only 6 decimals to use - it should be at least 8, like with other bitcoin-based currencies - fortunately other wallets seems to handle 8 decimals on Nano)
instant txs - also a huge plus
decentralized nodes (although Doge also has it - even more because it has about 1K+ nodes)
quite vibrant community
slowly being adopted in a few services - which is a plus
Liquidity comparison: Nano: https://coinpaprika.com/coin/nano-nano/#!liquidity Doge: https://coinpaprika.com/coin/doge-dogecoin/#!liquidity The trend is evident, if you switch to 1y or max on market depth history - Dogecoin have almost +100% growth in this period (from June 2019) and Nano 50% decline. Looking at the data from vcdepth it's even more apparent: https://vcdepth.io/coins/doge-doge https://vcdepth.io/coins/nano-nano As I say, I think Nano can learn from Doge's some, especially regarding exchange's liquidity - that's preventing a lot from happening right now. Binance is the only source, and market maker for Nano, but there should be more - through the ecosystem. What Nano team should do in my opinion is: take part of their funds from dev premine, and use it for liquidity purposes. Cryptocurrencies can't be "run" like startups, and Nano holding shouldn't be treated as equity or cash equivalent, dumping it straight on the books. Binance is making a lot to provide all of their coins with liquid markets (their MMs are one of the best on the market), but I think team can increase liquidity easily by a factor of 2-3x, just by hiring specialistic company, that will manage it. I know coins, that have done it - and it's the main thing that helped them stay relevant. Developing protocol is important, but without liquid market - it doesn't achieve anything (because it won't be used by more people). Especially I would try to improve USDT markets - they are basically USD pairs. PS. I'm not a developer, but I research CCs on daily basis, because it's actually my work. I think my comparison is right, because Doge have achieve much more then being only "meme" currency, and Banano did not (it's only meme currency without liquidity, acceptance, or being really used anywhere).
Dear Groestlers, it goes without saying that 2020 has been a difficult time for millions of people worldwide. The groestlcoin team would like to take this opportunity to wish everyone our best to everyone coping with the direct and indirect effects of COVID-19. Let it bring out the best in us all and show that collectively, we can conquer anything. The centralised banks and our national governments are facing unprecedented times with interest rates worldwide dropping to record lows in places. Rest assured that this can only strengthen the fundamentals of all decentralised cryptocurrencies and the vision that was seeded with Satoshi's Bitcoin whitepaper over 10 years ago. Despite everything that has been thrown at us this year, the show must go on and the team will still progress and advance to continue the momentum that we have developed over the past 6 years. In addition to this, we'd like to remind you all that this is Groestlcoin's 6th Birthday release! In terms of price there have been some crazy highs and lows over the years (with highs of around $2.60 and lows of $0.000077!), but in terms of value– Groestlcoin just keeps getting more valuable! In these uncertain times, one thing remains clear – Groestlcoin will keep going and keep innovating regardless. On with what has been worked on and completed over the past few months.
UPDATED - Groestlcoin Core 2.18.2
This is a major release of Groestlcoin Core with many protocol level improvements and code optimizations, featuring the technical equivalent of Bitcoin v0.18.2 but with Groestlcoin-specific patches. On a general level, most of what is new is a new 'Groestlcoin-wallet' tool which is now distributed alongside Groestlcoin Core's other executables. NOTE: The 'Account' API has been removed from this version which was typically used in some tip bots. Please ensure you check the release notes from 2.17.2 for details on replacing this functionality.
Builds are now done through Gitian
Calls to getblocktemplate will fail if the segwit rule is not specified. Calling getblocktemplate without segwit specified is almost certainly a misconfiguration since doing so results in lower rewards for the miner. Failed calls will produce an error message describing how to enable the segwit rule.
A warning is printed if an unrecognized section name is used in the configuration file. Recognized sections are [test], [main], and [regtest].
Four new options are available for configuring the maximum number of messages that ZMQ will queue in memory (the "high water mark") before dropping additional messages. The default value is 1,000, the same as was used for previous releases.
The rpcallowip option can no longer be used to automatically listen on all network interfaces. Instead, the rpcbind parameter must be used to specify the IP addresses to listen on. Listening for RPC commands over a public network connection is insecure and should be disabled, so a warning is now printed if a user selects such a configuration. If you need to expose RPC in order to use a tool like Docker, ensure you only bind RPC to your localhost, e.g. docker run [...] -p 127.0.0.1:1441:1441 (this is an extra :1441 over the normal Docker port specification).
The rpcpassword option now causes a startup error if the password set in the configuration file contains a hash character (#), as it's ambiguous whether the hash character is meant for the password or as a comment.
The whitelistforcerelay option is used to relay transactions from whitelisted peers even when not accepted to the mempool. This option now defaults to being off, so that changes in policy and disconnect/ban behavior will not cause a node that is whitelisting another to be dropped by peers.
A new short about the JSON-RPC interface describes cases where the results of anRPC might contain inconsistencies between data sourced from differentsubsystems, such as wallet state and mempool state.
A new document introduces Groestlcoin Core's BIP174 interface, which is used to allow multiple programs to collaboratively work to create, sign, and broadcast new transactions. This is useful for offline (cold storage) wallets, multisig wallets, coinjoin implementations, and many other cases where two or more programs need to interact to generate a complete transaction.
The output script descriptor (https://github.com/groestlcoin/groestlcoin/blob/mastedoc/descriptors.md) documentation has been updated with information about new features in this still-developing language for describing the output scripts that a wallet or other program wants to receive notifications for, such as which addresses it wants to know received payments. The language is currently used in multiple new and updated RPCs described in these release notes and is expected to be adapted to other RPCs and to the underlying wallet structure.
A new --disable-bip70 option may be passed to ./configure to prevent Groestlcoin-Qt from being built with support for the BIP70 payment protocol or from linking libssl. As the payment protocol has exposed Groestlcoin Core to libssl vulnerabilities in the past, builders who don't need BIP70 support are encouraged to use this option to reduce their exposure to future vulnerabilities.
The minimum required version of Qt (when building the GUI) has been increased from 5.2 to 5.5.1 (the depends system provides 5.9.7)
getnodeaddresses returns peer addresses known to this node. It may be used to find nodes to connect to without using a DNS seeder.
listwalletdir returns a list of wallets in the wallet directory (either the default wallet directory or the directory configured bythe -walletdir parameter).
getrpcinfo returns runtime details of the RPC server. Currently, it returns an array of the currently active commands and how long they've been running.
deriveaddresses returns one or more addresses corresponding to an output descriptor.
getdescriptorinfo accepts a descriptor and returns information aboutit, including its computed checksum.
joinpsbts merges multiple distinct PSBTs into a single PSBT. The multiple PSBTs must have different inputs. The resulting PSBT will contain every input and output from all the PSBTs. Any signatures provided in any of the PSBTs will be dropped.
analyzepsbt examines a PSBT and provides information about what the PSBT contains and the next steps that need to be taken in order to complete the transaction. For each input of a PSBT, analyze psbt provides information about what information is missing for that input, including whether a UTXO needs to be provided, what pubkeys still need to be provided, which scripts need to be provided, and what signatures are still needed. Every input will also list which role is needed to complete that input, and analyzepsbt will also list the next role in general needed to complete the PSBT. analyzepsbt will also provide the estimated fee rate and estimated virtual size of the completed transaction if it has enough information to do so.
utxoupdatepsbt searches the set of Unspent Transaction Outputs (UTXOs) to find the outputs being spent by the partial transaction. PSBTs need to have the UTXOs being spent to be provided because the signing algorithm requires information from the UTXO being spent. For segwit inputs, only the UTXO itself is necessary. For non-segwit outputs, the entire previous transaction is needed so that signers can be sure that they are signing the correct thing. Unfortunately, because the UTXO set only contains UTXOs and not full transactions, utxoupdatepsbt will only add the UTXO for segwit inputs.
getpeerinfo now returns an additional minfeefilter field set to the peer's BIP133 fee filter. You can use this to detect that you have peers that are willing to accept transactions below the default minimum relay fee.
The mempool RPCs, such as getrawmempool with verbose=true, now return an additional "bip125-replaceable" value indicating whether thetransaction (or its unconfirmed ancestors) opts-in to asking nodes and miners to replace it with a higher-feerate transaction spending any of the same inputs.
settxfee previously silently ignored attempts to set the fee below the allowed minimums. It now prints a warning. The special value of"0" may still be used to request the minimum value.
getaddressinfo now provides an ischange field indicating whether the wallet used the address in a change output.
importmulti has been updated to support P2WSH, P2WPKH, P2SH-P2WPKH, and P2SH-P2WSH. Requests for P2WSH and P2SH-P2WSH accept an additional witnessscript parameter.
importmulti now returns an additional warnings field for each request with an array of strings explaining when fields are being ignored or are inconsistent, if there are any.
getaddressinfo now returns an additional solvable Boolean field when Groestlcoin Core knows enough about the address's scriptPubKey, optional redeemScript, and optional witnessScript for the wallet to be able to generate an unsigned input spending funds sent to that address.
The getaddressinfo, listunspent, and scantxoutset RPCs now return an additional desc field that contains an output descriptor containing all key paths and signing information for the address (except for the private key). The desc field is only returned for getaddressinfo and listunspent when the address is solvable.
importprivkey will preserve previously-set labels for addresses or public keys corresponding to the private key being imported. For example, if you imported a watch-only address with the label "coldwallet" in earlier releases of Groestlcoin Core, subsequently importing the private key would default to resetting the address's label to the default empty-string label (""). In this release, the previous label of "cold wallet" will be retained. If you optionally specify any label besides the default when calling importprivkey, the new label will be applied to the address.
getmininginfo now omits currentblockweight and currentblocktx when a block was never assembled via RPC on this node.
The getrawtransaction RPC & REST endpoints no longer check the unspent UTXO set for a transaction. The remaining behaviors are as follows:
If a blockhash is provided, check the corresponding block.
If no blockhash is provided, check the mempool.
If no blockhash is provided but txindex is enabled, also check txindex.
unloadwallet is now synchronous, meaning it will not return until the wallet is fully unloaded.
importmulti now supports importing of addresses from descriptors. A desc parameter can be provided instead of the "scriptPubKey" in are quest, as well as an optional range for ranged descriptors to specify the start and end of the range to import. Descriptors with key origin information imported through importmulti will have their key origin information stored in the wallet for use with creating PSBTs.
listunspent has been modified so that it also returns witnessScript, the witness script in the case of a P2WSH orP2SH-P2WSH output.
createwallet now has an optional blank argument that can be used to create a blank wallet. Blank wallets do not have any keys or HDseed. They cannot be opened in software older than 2.18.2. Once a blank wallet has a HD seed set (by using sethdseed) or private keys, scripts, addresses, and other watch only things have been imported, the wallet is no longer blank and can be opened in 2.17.2. Encrypting a blank wallet will also set a HD seed for it.
signrawtransaction is removed after being deprecated and hidden behind a special configuration option in version 2.17.2.
The 'account' API is removed after being deprecated in v2.17.2 The 'label' API was introduced in v2.17.2 as a replacement for accounts. See the release notes from v2.17.2 for a full description of the changes from the 'account' API to the 'label' API.
addwitnessaddress is removed after being deprecated in version 2.16.0.
generate is deprecated and will be fully removed in a subsequent major version. This RPC is only used for testing, but its implementation reached across multiple subsystems (wallet and mining), so it is being deprecated to simplify the wallet-node interface. Projects that are using generate for testing purposes should transition to using the generatetoaddress RPC, which does not require or use the wallet component. Calling generatetoaddress with an address returned by the getnewaddress RPC gives the same functionality as the old generate RPC. To continue using generate in this version, restart groestlcoind with the -deprecatedrpc=generate configuration option.
Be reminded that parts of the validateaddress command have been deprecated and moved to getaddressinfo. The following deprecated fields have moved to getaddressinfo: ismine, iswatchonly,script, hex, pubkeys, sigsrequired, pubkey, embedded,iscompressed, label, timestamp, hdkeypath, hdmasterkeyid.
The addresses field has been removed from the validateaddressand getaddressinfo RPC methods. This field was confusing since it referred to public keys using their P2PKH address. Clients should use the embedded.address field for P2SH or P2WSH wrapped addresses, and pubkeys for inspecting multisig participants.
A new /rest/blockhashbyheight/ endpoint is added for fetching the hash of the block in the current best blockchain based on its height (how many blocks it is after the Genesis Block).
A new Window menu is added alongside the existing File, Settings, and Help menus. Several items from the other menus that opened new windows have been moved to this new Window menu.
In the Send tab, the checkbox for "pay only the required fee" has been removed. Instead, the user can simply decrease the value in the Custom Fee rate field all the way down to the node's configured minimumrelay fee.
In the Overview tab, the watch-only balance will be the only balance shown if the wallet was created using the createwallet RPC and thedisable_private_keys parameter was set to true.
The launch-on-startup option is no longer available on macOS if compiled with macosx min version greater than 10.11 (useCXXFLAGS="-mmacosx-version-min=10.11" CFLAGS="-mmacosx-version-min=10.11" for setting the deployment sdkversion)
A new groestlcoin-wallet tool is now distributed alongside Groestlcoin Core's other executables. Without needing to use any RPCs, this tool can currently create a new wallet file or display some basic information about an existing wallet, such as whether the wallet is encrypted, whether it uses an HD seed, how many transactions it contains, and how many address book entries it has.
Since version 2.16.0, Groestlcoin Core's built-in wallet has defaulted to generating P2SH-wrapped segwit addresses when users want to receive payments. These addresses are backwards compatible with all widely used software. Starting with Groestlcoin Core 2.20.1 (expected about a year after 2.18.2), Groestlcoin Core will default to native segwitaddresses (bech32) that provide additional fee savings and other benefits. Currently, many wallets and services already support sending to bech32 addresses, and if the Groestlcoin Core project sees enough additional adoption, it will instead default to bech32 receiving addresses in Groestlcoin Core 2.19.1. P2SH-wrapped segwit addresses will continue to be provided if the user requests them in the GUI or by RPC, and anyone who doesn't want the update will be able to configure their default address type. (Similarly, pioneering users who want to change their default now may set the addresstype=bech32 configuration option in any Groestlcoin Core release from 2.16.0 up.)
BIP 61 reject messages are now deprecated. Reject messages have no use case on the P2P network and are only logged for debugging by most network nodes. Furthermore, they increase bandwidth and can be harmful for privacy and security. It has been possible to disable BIP 61 messages since v2.17.2 with the -enablebip61=0 option. BIP 61 messages will be disabled by default in a future version, before being removed entirely.
The submitblock RPC previously returned the reason a rejected block was invalid the first time it processed that block but returned a generic "duplicate" rejection message on subsequent occasions it processed the same block. It now always returns the fundamental reason for rejecting an invalid block and only returns "duplicate" for valid blocks it has already accepted.
A new submitheader RPC allows submitting block headers independently from their block. This is likely only useful for testing.
The signrawtransactionwithkey and signrawtransactionwithwallet RPCs have been modified so that they also optionally accept a witnessScript, the witness script in the case of a P2WSH orP2SH-P2WSH output. This is compatible with the change to listunspent.
For the walletprocesspsbt and walletcreatefundedpsbt RPCs, if thebip32derivs parameter is set to true but the key metadata for a public key has not been updated yet, then that key will have a derivation path as if it were just an independent key (i.e. no derivation path and its master fingerprint is itself).
The -usehd configuration option was removed in version 2.16.0 From that version onwards, all new wallets created are hierarchical deterministic wallets. This release makes specifying -usehd an invalid configuration option.
This release allows peers that your node automatically disconnected for misbehaviour (e.g. sending invalid data) to reconnect to your node if you have unused incoming connection slots. If your slots fill up, a misbehaving node will be disconnected to make room for nodes without a history of problems (unless the misbehaving node helps your node in some other way, such as by connecting to a part of the Internet from which you don't have many other peers). Previously, Groestlcoin Core banned the IP addresses of misbehaving peers for a period (default of 1 day); this was easily circumvented by attackers with multiple IP addresses. If you manually ban a peer, such as by using the setban RPC, all connections from that peer will still be rejected.
The key metadata will need to be upgraded the first time that the HDseed is available. For unencrypted wallets this will occur on wallet loading. For encrypted wallets this will occur the first time the wallet is unlocked.
Newly encrypted wallets will no longer require restarting the software. Instead such wallets will be completely unloaded and reloaded to achieve the same effect.
A sub-project of Bitcoin Core now provides Hardware Wallet Interaction (HWI) scripts that allow command-line users to use several popular hardware key management devices with Groestlcoin Core. See their project page for details.
This release changes the Random Number Generator (RNG) used from OpenSSL to Groestlcoin Core's own implementation, although entropy gathered by Groestlcoin Core is fed out to OpenSSL and then read back in when the program needs strong randomness. This moves Groestlcoin Core a little closer to no longer needing to depend on OpenSSL, a dependency that has caused security issues in the past. The new implementation gathers entropy from multiple sources, including from hardware supporting the rdseed CPU instruction.
On macOS, Groestlcoin Core now opts out of application CPU throttling ("app nap") during initial blockchain download, when catching up from over 100 blocks behind the current chain tip, or when reindexing chain data. This helps prevent these operations from taking an excessively long time because the operating system is attempting to conserve power.
How to Upgrade?
Windows If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), then run the installer. OSX If you are running an older version, shut it down. Wait until it has completely shut down (which might take a few minutes for older versions), run the dmg and drag Groestlcoin Core to Applications. Ubuntu http://groestlcoin.org/forum/index.php?topic=441.0
ALL NEW - Groestlcoin Moonshine iOS/Android Wallet
Built with React Native, Moonshine utilizes Electrum-GRS's JSON-RPC methods to interact with the Groestlcoin network. GRS Moonshine's intended use is as a hot wallet. Meaning, your keys are only as safe as the device you install this wallet on. As with any hot wallet, please ensure that you keep only a small, responsible amount of Groestlcoin on it at any given time.
Groestlcoin Mainnet & Testnet supported
Multiple wallet support
Electrum - Support for both random and custom peers
Biometric + Pin authentication
Custom fee selection
Import mnemonic phrases via manual entry or scanning
BIP39 Passphrase functionality
Support for Segwit-compatible & legacy addresses in settings
Support individual private key sweeping
UTXO blacklisting - Accessible via the Transaction Detail view, this allows users to blacklist any utxo that they do not wish to include in their list of available utxo's when sending transactions. Blacklisting a utxo excludes its amount from the wallet's total balance.
Ability to Sign & Verify Messages
Support BitID for password-free authentication
Coin Control - This can be accessed from the Send Transaction view and basically allows users to select from a list of available UTXO's to include in their transaction.
HODL GRS connects directly to the Groestlcoin network using SPV mode and doesn't rely on servers that can be hacked or disabled. HODL GRS utilizes AES hardware encryption, app sandboxing, and the latest security features to protect users from malware, browser security holes, and even physical theft. Private keys are stored only in the secure enclave of the user's phone, inaccessible to anyone other than the user. Simplicity and ease-of-use is the core design principle of HODL GRS. A simple recovery phrase (which we call a Backup Recovery Key) is all that is needed to restore the user's wallet if they ever lose or replace their device. HODL GRS is deterministic, which means the user's balance and transaction history can be recovered just from the backup recovery key.
Simplified payment verification for fast mobile performance
Groestlcoin Seed Savior is a tool for recovering BIP39 seed phrases. This tool is meant to help users with recovering a slightly incorrect Groestlcoin mnemonic phrase (AKA backup or seed). You can enter an existing BIP39 mnemonic and get derived addresses in various formats. To find out if one of the suggested addresses is the right one, you can click on the suggested address to check the address' transaction history on a block explorer.
If a word is wrong, the tool will try to suggest the closest option.
If a word is missing or unknown, please type "?" instead and the tool will find all relevant options.
NOTE: NVidia GPU or any CPU only. AMD graphics cards will not work with this address generator. VanitySearch is a command-line Segwit-capable vanity Groestlcoin address generator. Add unique flair when you tell people to send Groestlcoin. Alternatively, VanitySearch can be used to generate random addresses offline. If you're tired of the random, cryptic addresses generated by regular groestlcoin clients, then VanitySearch is the right choice for you to create a more personalized address. VanitySearch is a groestlcoin address prefix finder. If you want to generate safe private keys, use the -s option to enter your passphrase which will be used for generating a base key as for BIP38 standard (VanitySearch.exe -s "My PassPhrase" FXPref). You can also use VanitySearch.exe -ps "My PassPhrase" which will add a crypto secure seed to your passphrase. VanitySearch may not compute a good grid size for your GPU, so try different values using -g option in order to get the best performances. If you want to use GPUs and CPUs together, you may have best performances by keeping one CPU core for handling GPU(s)/CPU exchanges (use -t option to set the number of CPU threads).
Fixed size arithmetic
Fast Modular Inversion (Delayed Right Shift 62 bits)
SecpK1 Fast modular multiplication (2 steps folding 512bits to 256bits using 64 bits digits)
Use some properties of elliptic curve to generate more keys
SSE Secure Hash Algorithm SHA256 and RIPEMD160 (CPU)
Groestlcoin EasyVanity 2020 is a windows app built from the ground-up and makes it easier than ever before to create your very own bespoke bech32 address(es) when whilst not connected to the internet. If you're tired of the random, cryptic bech32 addresses generated by regular Groestlcoin clients, then Groestlcoin EasyVanity2020 is the right choice for you to create a more personalised bech32 address. This 2020 version uses the new VanitySearch to generate not only legacy addresses (F prefix) but also Bech32 addresses (grs1 prefix).
Ability to continue finding keys after first one is found
Includes warning on start-up if connected to the internet
Ability to output keys to a text file (And shows button to open that directory)
Show and hide the private key with a simple toggle switch
Show full output of commands
Ability to choose between Processor (CPU) and Graphics Card (GPU) ( NVidia ONLY! )
Features both a Light and Dark Material Design-Style Themes
Free software - MIT. Anyone can audit the code.
Written in C# - The code is short, and easy to review.
Groestlcoin WPF is an alternative full node client with optional lightweight 'thin-client' mode based on WPF. Windows Presentation Foundation (WPF) is one of Microsoft's latest approaches to a GUI framework, used with the .NET framework. Its main advantages over the original Groestlcoin client include support for exporting blockchain.dat and including a lite wallet mode. This wallet was previously deprecated but has been brought back to life with modern standards.
Works via TOR or SOCKS5 proxy
Can use bootstrap.dat format as blockchain database
Import/Export blockchain to/from bootstrap.dat
Import wallet.dat from Groestlcoin-qt wallet
Export wallet to wallet.dat
Use both groestlcoin-wpf and groestlcoin-qt with the same addresses in parallel. When you send money from one program, the transaction will automatically be visible on the other wallet.
Rescan blockchain with a simple mouse click
Works as a full node and listens to port 1331 (listening port can be changed)
Fast Block verifying, parallel processing on multi-core CPUs
Mine Groestlcoins with your CPU by a simple mouse click
All private keys are kept encrypted on your local machine (or on a USB stick)
Lite - Has a lightweight "thin client" mode which does not require a new user to download the entire Groestlcoin chain and store it
Free and decentralised - Open Source under GNU license
Fixed Import/Export to wallet.dat
Rescan wallet option
Change wallet password option
Address type and Change type options through *.conf file
Import from bootstrap.dat - It is a flat, binary file containing Groestlcoin blockchain data, from the genesis block through a recent height. All versions automatically validate and import the file "grs.bootstrap.dat" in the GRS directory. Grs.bootstrap.dat is compatible with Qt wallet. GroestlCoin-Qt can load from it.
In Full mode file %APPDATA%\Groestlcoin-WPF\GRS\GRS.bootstrap.dat is full blockchain in standard bootstrap.dat format and can be used with other clients.
Groestlcoin Electrum Personal Server aims to make using Electrum Groestlcoin wallet more secure and more private. It makes it easy to connect your Electrum-GRS wallet to your own full node. It is an implementation of the Electrum-grs server protocol which fulfils the specific need of using the Electrum-grs wallet backed by a full node, but without the heavyweight server backend, for a single user. It allows the user to benefit from all Groestlcoin Core's resource-saving features like pruning, blocks only and disabled txindex. All Electrum-GRS's feature-richness like hardware wallet integration, multi-signature wallets, offline signing, seed recovery phrases, coin control and so on can still be used, but connected only to the user's own full node. Full node wallets are important in Groestlcoin because they are a big part of what makes the system be trust-less. No longer do people have to trust a financial institution like a bank or PayPal, they can run software on their own computers. If Groestlcoin is digital gold, then a full node wallet is your own personal goldsmith who checks for you that received payments are genuine. Full node wallets are also important for privacy. Using Electrum-GRS under default configuration requires it to send (hashes of) all your Groestlcoin addresses to some server. That server can then easily spy on your transactions. Full node wallets like Groestlcoin Electrum Personal Server would download the entire blockchain and scan it for the user's own addresses, and therefore don't reveal to anyone else which Groestlcoin addresses they are interested in. Groestlcoin Electrum Personal Server can also broadcast transactions through Tor which improves privacy by resisting traffic analysis for broadcasted transactions which can link the IP address of the user to the transaction. If enabled this would happen transparently whenever the user simply clicks "Send" on a transaction in Electrum-grs wallet. Note: Currently Groestlcoin Electrum Personal Server can only accept one connection at a time.
Use your own node
Uses less CPU and RAM than ElectrumX
Used intermittently rather than needing to be always-on
Doesn't require an index of every Groestlcoin address ever used like on ElectrumX
UPDATED – Android Wallet 7.38.1 - Main Net + Test Net
The app allows you to send and receive Groestlcoin on your device using QR codes and URI links. When using this app, please back up your wallet and email them to yourself! This will save your wallet in a password protected file. Then your coins can be retrieved even if you lose your phone.
Add confidence messages, helping users to understand the confidence state of their payments.
Handle edge case when restoring via an external app.
Count devices with a memory class of 128 MB as low ram.
Introduce dark mode on Android 10 devices.
Reduce memory usage of PIN-protected wallets.
Tapping on the app's version will reveal a checksum of the APK that was installed.
Fix issue with confirmation of transactions that empty your wallet.
Groestlcoin Sentinel is a great solution for anyone who wants the convenience and utility of a hot wallet for receiving payments directly into their cold storage (or hardware wallets). Sentinel accepts XPUB's, YPUB'S, ZPUB's and individual Groestlcoin address. Once added you will be able to view balances, view transactions, and (in the case of XPUB's, YPUB's and ZPUB's) deterministically generate addresses for that wallet. Groestlcoin Sentinel is a fork of Groestlcoin Samourai Wallet with all spending and transaction building code removed.
Scale is a substrate JSON-RPC API client and libraries implemented in ruby language for general use. It contains the implementation of low-level data formats, various substrate types and also supports metadata. This work is the prerequisite of our subsequent series of projects. We hope to easily access Polkadot and Substrate through our familiar language ruby, such that the applications based on Polkadot / Substrate can be developed at a fast pace. We plan to develop some substrate-based web games. The back end of these applications is prepared to be developed in ruby language, and then interact with nodes or synchronize data through RPC.
Itering (www.itering.io) is a blockchain technology company founded in Singapore in 2018. Most of people in this company are senior blockchain developers and experts in the blockchain core technology and participate in the development the open source projects of Bitcoin, Ethereum, NEO, etc. The blockchain core development is the most important part of current development, especially the cross chain technology. The Darwinia Network is also developed by Itering and focus on the assets exchange and help blockchain applications cross-chain. The first integration part of Darwinia Network facing on gaming is Evolution Land, which is also developed by Itering in 2018 to 2019, and have Ethereum Land and Tron Land. The goal of Itering is to promote the massive adoption of blockchain and iterate to a trust-free future. The Scale is the first big step in blockchain games and Evolution Land, and also let the Darwinia Network move much forwards to the goal.
First off, big thanks to u/Matoking for his nanolib library, and thanks to https://www.alilnano.com/ for the nano to test with --- TL;DR I made a small API that is able to timestamp strings and json in-real-time using the nano blockchain instead of using the bitcoin blockchain. Check it out here - http://184.108.40.206/ (will be moving it soon). I have a few questions near end of post: Lately, I've worked on some DNA sequences that I'd like to maintain in the public domain (as a synthetic biologist). In order to do that, I thought it would be nice to timestamp the data I generated on a blockchain (this timestamp does not to be extremely specific, within a few days is fine). At first, I checked out https://opentimestamps.org/ which is a great project. HOWEVER - getting the block takes quite a few hours, which really sucks for integrating it into different applications (https://github.com/opentimestamps/opentimestamps-client/blob/masteREADME.md). I wanted to (nearly) instantly get a hash that can be attributed to a certain piece of data. Here comes Nano, which is feeless and nearly instant, and so solves my problem. I like hacking little things together, so I made a small Flask app, code here https://github.com/Koeng101/nanotimestamps. You can check out the actual API at http://220.127.116.11/, try it out! (I'm still connected to mynano ninja, so I don't have enough api calls to begin integrating into things) Questions:
In my understanding, Nano's block lattice basically makes the 'frontier' blocks the only ones that are really saved in a decentralized manner, and previous blocks can be pruned (https://www.reddit.com/nanocurrency/comments/aqq6zm/nano_how_2_blocks_and_lattices/). How about unpocketed transactions? For example (if I remember correctly) xrb_3bejnuc1qx31a37147smsyuu568p7jkuy4yfneoohemqu8psy75g7rys7mck is the hash of 'Hello World', and there are a couple unpocketed transactions floating there, which can never be pocketed unless you can find the private key of that public key. Will those ever be pruned from the ledger?
Is this an ethical project? If those transactions are never removed from the ledger (ie can't be pruned), then that means that every file or json I hash to save will now be bloating the ledger. I'm not too worried about the burn rate, since I only send 1 raw.
How do I set up my node so I can do RPC calls to it? Sorry for being a noob, but I couldn't figure this one out. My node online node is here 18.104.22.168, and I just can't figure out how to remotely connect to it with RPC.
KYC-Tezos wallets vulnerable to "blind sig" attack
Summary Most KYC-Tezos wallets we tested are vulnerable to a simple yet catastrophic attack that can lead to loss of all funds on wallet (blind signature vulnerability). These wallets connect to a server (the RPC node) but they do not build the raw tx like normal cryptocurrency wallets, nor do they check the binary provided by the RPC before signing it. Should the RPC get hacked (or turn malicious) it will provide clients a malicious tx to sign: with no way to parse the binary, the unsuspecting user will sign a tx which sends 100% of their funds to the attacker's address. (Update: since publishing this post some wallets have fixed the issue, see table below) Ledger Ledger users are not safe. This video shows how funds can be stolen from a Ledger device. Demo To demonstrate the vulnerability we also expose a malicious RPC to test your wallet against it (warning: funds could be lost). Vulnerable wallets
Can set custom RPC?
No (fixed in 0.7.0b+)
No (fixed in v137+)
No (fixed in 13.0.0)
No (fixed in 4.0.0+)
No (fixed in 4.0.0+)
No (fixed in v0.4.3+)
Why it matters Cryptocurrency wallets were meant to be trustless, but most KYC-Tezos wallets are not. When you're signing any tx with these wallets you're trusting the server (RPC) to send your money where you actually want it to go. Even if you trust the sourcecode of your wallet and are not using a web wallet, you're still vulnerable. The RPC you rely upon could turn malicious (e.g. be hacked) at any moment in time, with no way for you to detect it. How the attack works
RPC turns malicious (e.g. gets hacked)
Wallet securely connects to malicious RPC via HTTPS
Wallet provides JSON of tx to build
RPC provides malicious binary sending funds to attacker's address
Wallet blindly signs binary
RPC broadcasts tx: funds are now lost
In a variant of the attack, the unsuspecting user will set a malicious RPC as custom RPC in their wallet. There are multiple ways someone could be tricked to do that (see Electrum hack below). Causes More than wallet developers themselves, we deem KYC-Tezos developers inadequacy and lack of understanding of an adversarial environment as the culprit for this simple yet potentially catastrophic vulnerability. 1.Wrong design The RPC exposes a JSON API to build the tx, which is then provided to the client for signing, and returned to the RPC for broadcast. This is not how a blockchain wallet should work: txs should be built and signed locally, and only then pushed to a server. 2.OCaml binary with no serialization specs In the KYC-Tezos APIs there is no spec for the transaction binary format. tezos-data-encoding is the library responsible for encoding a tx, so the tx format is tightly coupled with the the serialization of OCaml objects. An OCaml binary with no spec is what led GUI wallet developers, who are not using OCaml, to just trust the binary provided by the RPC instead of parsing and checking it. A secure channel with your attacker SSL security between client and server won't help: if the RPC turns malicious, it will first establish a secure connection as usual and then provide a malicious tx to sign. Hiding in plain sight, KYC-Tezos APIs actually hint  to the vulnerability. The "solution" they suggest is securing the connection, which as already explained does not solve the issue at all while providing users a false sense of security. Hiding in plain sight: a hint from KYC-Tezos APIs What happened to Electrum Recently more than $750,000 were stolen by an attacker spawning malicious Electrum servers and stealing BTC from Electrum users.  The attack succeeded despite Electrum being way more secure than KYC-Tezos wallets: with Electrum the tx is generated by the client and not by the server. Malicious RPC demo Set this custom RPC in your wallet to test the vulnerability:
WARNING: IF YOUR WALLET IS VULNERABLE FUNDS WILL BE LOST AND SENT TO FOUNDATION BAKER 1 (tz3RDC3Jdn4j15J7bBHZd29EUee9gVB1CxD9) As safety measure this demo RPC only manipulates recpient's address, and not the transaction amount as well. If your wallet is vulnerable and not listed above yet, please let us know. How we fixed it We fixed the vulnerability in LibreBox by checking portions of the tx (such as destination address, amount, etc) after a reverse-engineering of the tx format itself. Suggested next steps
KYC-Tezos users: do not sign any tx with a vulnerable wallet until the vulnerability is addressed.
Wallet developers: immediately start warning your users of the danger, until binary txs are parsed and checked. If you resolved the issue or if your wallet is not listed, feel free to contact us to update this post.
Tezos Foundation: immediately release specs for the binary tx format, and improve documentation to a more decent standard.
Problems checking wallet, bitcoin core on another server
So my setup is that currently Bitcoin core is running on a Windows server, and joinmarket is a fresh install on debian. Bitcoin core is a full node, no pruning, fully synced. I had some problems opening up RPC but I think that part works now (no longer getting timeouts). But instead this happens:
[email protected]:/home/johan/joinmarket-0.2.3# python wallet-tool.py wallet.json 2019-08-22 12:12:57,613 [MainThread ] [INFO ] hello joinmarket 2019-08-22 12:12:57,613 [MainThread ] [INFO ] Joinmarket directory is: /home/johan/joinmarket-0.2.3 Enter wallet decryption passphrase: 2019-08-22 12:13:07,323 [MainThread ] [INFO ] requesting detailed wallet history from Bitcoin Core client Traceback (most recent call last): File "wallet-tool.py", line 126, in sync_wallet(wallet, fast=options.fastsync) File "/home/johan/joinmarket-0.2.3/joinmarket/blockchaininterface.py", line 79, in sync_wallet jm_single().bc_interface.sync_wallet(wallet) File "/home/johan/joinmarket-0.2.3/joinmarket/blockchaininterface.py", line 959, in sync_wallet super(BitcoinCoreInterface, self).sync_wallet(wallet) File "/home/johan/joinmarket-0.2.3/joinmarket/blockchaininterface.py", line 88, in sync_wallet self.sync_addresses(wallet) File "/home/johan/joinmarket-0.2.3/joinmarket/blockchaininterface.py", line 1065, in sync_addresses imported_addr_set = set(self.rpc('getaddressesbyaccount', [wallet_name])) File "/home/johan/joinmarket-0.2.3/joinmarket/blockchaininterface.py", line 935, in rpc res = self.jsonRpc.call(method, args) File "/home/johan/joinmarket-0.2.3/joinmarket/jsonrpc.py", line 117, in call raise JsonRpcError(response["error"]) joinmarket.jsonrpc.JsonRpcError [email protected]:/home/johan/joinmarket-0.2.3#
11-25 12:23 - 'I’m not sure why you are being down voted. The Dash Core team has been working very hard towards to the goals of the Dash Platform and are very close to pushing the final pieces of the foundation. / I know Dash is the bastard...' by /u/coingun removed from /r/Bitcoin within 493-503min
''' I’m not sure why you are being down voted. The Dash Core team has been working very hard towards to the goals of the Dash Platform and are very close to pushing the final pieces of the foundation. I know Dash is the bastard step child of this sub but still... Dash Core v1.0 includes Username based payments Decentralized API (DAPI) Decentralized data storage Development libraries and SDKs Dash is very close to releasing an entire platform that many different types of Dapps will be built. If you are a bank and your infrastructure is out dated why not just rebuild your financial systems using the DAPI and DashDrive? I’m keep my eye on Dash but damn there have been some Mis-steps in its past. “DAPI, Dash’s Decentralized API Clients will be able to integrate their applications to Dash Platform via DAPI (dæ-pee), our distributed, decentralized API. DAPI is an HTTP API exposing JSON-RPC endpoints. Through these endpoints, developers will be able to send and retrieve application data via Drive, as well as query the blockchain, eventually replicating the functionality of Insight through a more developer-friendly interface. In effect, DAPI provides developers with the same access and security of a full node, without the cost and maintenance overhead. Developers will use DAPI to submit state transitions for storage in Drive. The fees for submitting these state transitions will be comprised of a fixed transaction cost, similar to a normal transaction fee, and a variable cost determined by the size of the data being stored. In a typical p2p network, excessive leeching behavior can drain a network of its speed and efficiency. This free-rider problem is solved through our fee structure, which ensures that masternodes are adequately compensated at a level that supports the demands of the network.” ''' Context Link Go1dfish undelete link unreddit undelete link Author: coingun
Groestlcoin September 2019 Development Release/Update!
For a more interactive view of changes, click here In our current world; bordering on financial chaos, with tariff wars, Brexit and hyperinflation rife, you can count on Groestlcoin to consistently produce innovation that strikes to take the power away from the few and into the many, even after a full five and a half years of solid development. Here is what the team has already announced in the last 3 months since the last development update:
Groestl Nodes aims to map out and compare the status of the Groestlcoin mainnet and testnet networks. Even though these networks share the same protocol, there is currently no way to directly compare these coins in a single location. These statistics are essential to evaluate the relative health of both networks.
Shows Onion (Tor) nodes
Shows IPv6 nodes
Supports both main net and test net
Node Checker – Check the status of a remote node
Ability to download node data by CSV, JSON or TXT format
Ability to download unique address data by CSV, JSON or TXT format
This is a tool for creating unsigned raw Groestlcoin transactions and also to verify existing transactions by entering in the transaction hex and converting this to a human-readable format to verify that a transaction is correct before it is signed.
Create Raw Unsigned Groestlcoin transactions
Generates a QR code for the transaction
Compatible with most Groestlcoin wallets including but not restricted to Groestlcoin Core and Electrum-GRS
Estimates final signed transaction size
Taking a raw transaction format and shows its Transaction ID, Transaction Inputs and Outputs
AGCore is an Android app designed to make it easier to run a Groestlcoin Core node on always-on Android appliances such as set-top boxes, Android TVs and repurposed tablets/phones. If you are a non-technical user of Groestlcoin and want an Android app that makes it easy to run a Groestlcoin Core node by acting as a wrapper, then AG Core is the right choice for you.
Update to Groestlcoin Core 2.17.2
Switched to native builds via NDK for Groestlcoin Core resulting in a smaller footprint.
Added embedded tor
Added tor pairing support
TOR upgrade bug fixes
Improved blockchain Sync progress using getblockchaininfo verificationprogress
Improved package download progress bar
Added support for external storage access > Android M
Added support for Android Oreo, including new notification mechanism
Bump Fee (RBF) improvements – Implemented a new fee-bump strategy that can add new inputs, so now any transaction can be fee-bumped. The old strategy was to decrease the value of outputs (starting with change). We will now try the new strategy first, and only use the old as a fallback.
Coin Choser improvements
More likely to construct transactions without change (where possible)
Less likely to construct transactions with really small change
Only spend negative effective value coins when beneficial for privacy
Fix long-standing bug that broke wallets with >65k addresses
Windows binaries: Now build the PyInstaller bootloader ourselves, as this seems to reduce anti-virus false positives
Fix performance regression for large wallets
Fix high-DPI issues related to text fields
Trezor – Allow bypassing 'too old firmware' error
Trezor – Use only the Bridge to scan devices if it is available
Hardware wallets – On Win10-1903, some hardware devices with U2F functionality can only be detected with Administrator privileges. A workaround is to run as Admin, or for Trezor to install the Bridge.
The AppImage Linux x86_64 binary and the Windows setup.exe are now built reproducibly.
Fix watch-only wallets that could not bump fee in some scenarios
Faster transaction signing for segwit inputs or really large transactions.
Groestlwallet is designed to protect you from malware, browser security holes, even physical theft. With AES hardware encryption, app sandboxing, keychain and code signatures, groestlwallet represents a significant security advance over web and desktop wallets, and other mobile platforms. Simplicity is groestlwallet's core design principle. Because groestlwallet is "deterministic", your balance and entire transaction history can be restored from just your recovery phrase.
iOS 0.7.3 Changes
Fix BIP70 payments
Updated QR Scanner
Lowered spending limit
Updated DNS Seeds
Fixed URL Scheme
Fixed GRS Name in mailing
Fixed crash upon starting in some scenarios
Android v89 Changes
Use default fee
Republished on Google Play by removing send_sms permissions
Currently this project is in the maintenance-only mode. We are planning to add several missing features and optimisations, but from a business point of view it is not our priority right now. If you would like to know more and/or discuss possible collaboration, send me a message on [[email protected]](mailto:[email protected])
To me it seems like this is yet another bitcoin client that is never going to mature enough to be used in production. :(
Top 10 of The Biggest Cryptocurrency Hacks and Scams Ever
If you have been around the cryptocurrency industry long enough, you will know that one of the biggest risks faced by users is the loss of funds through hacks on cryptocurrency wallets and exchanges. Online exchanges are prime targets for hackers and thieves on the internet. This is mainly because of the amount of funds that are kept on these platforms. For hackers that have succeeded in stealing funds from such platforms, the amounts are usually huge. As much as individual users try to play their roles in securing their accounts by using personal passwords, PINs and codes, there is a higher layer of security that lies in the hands of the platform providers. Once this is breached, the individual security efforts become irrelevant. Over the years, exchanges and wallets appear to have improved in terms of security as the frequency of hacks and platform breaches have reduced. What used to be a common occurrence in the industry has become a rare development, with hacks now few and far between. Let’s take a look at the top 10 of the biggest cryptocurrency hacks and scams ever.
10. Bitcoin Gold ($18 Million)
In May 2018, the theoretical 51% attack possibility was proven in a heist that saw a breach in Bitcoin Gold which cost the protocol $18 million. In this heist, hackers used 51% raw computing power to seize control of the network and carry out their ulterior plans effectively. Ciphertrace and other security outfits in the ecosystem believe that the algorithm weaknesses in Bitcoin Gold’s Proof of Work (PoW) transaction verification may have enabled the success of the theft.
9. Geth ($20 Million)
In June 2018, the Ethereum client Geth was hacked and ETH worth $20 million was stolen. This incidence was reported by blockchain security firm, Cyphertrace. During the hack, JSON-RPC port 8545 was exploited. This is the port that initiates ETH send transactions. All the ETH wallets that were affected by this breach was drained by the thieves, accumulating to the quoted $20 million equivalence based on the price of ETH at that time.
8. Bancor ($23.5 Million)
In July 2018, about one month after the Geth incident, decentralized cryptocurrency exchange, Bancor was hacked and $23.5 million worth of crypto stolen. This particular event raised some eyebrows in the cryptocurrency industry, redefining the general opinion of decentralized exchanges being prone to hacking. The process involved the exploitation of a security flaw in a wallet that was used to update some of the smart contracts on the exchange. Bancor, which was one of the most successful ICOs of 2017, raising $153 million during its token sale, was forced to shut down after the hack.
7. Coinrail ($40 Million)
Coinrail was hacked in June 2018, and $40 million was stolen from the exchange. The South Korean exchange which ranked among the top 100 exchanges by volume, suspended its services shortly after the hack. According to sources from the exchange, the tokens that were stolen included NPXS tokens from the Pundi X project, ATC from Aston and the NPER project’s NPER token.
Binance ($40.7 Million)
Binance exchange was hacked in May 2019 and 7,000 Bitcoins were stolen from the platform. The value of the Bitcoins stolen at the time was about $40.7 million. To achieve their aim, hackers were able to steal API keys, two-factor codes and some other key information to access the wallets. According to the exchange, the incident impacted only about 2% of its total Bitcoin holdings as all other wallets are secure. Affected wallets were promised a refund through the exchange’s Secure Asset Fund for Users (SAFU) arrangement. This is a policy that the exchange uses to prepare for rainy days. A portion of fees charged on the exchange is set aside in order to ensure that platform users do not bear the brunt during occurrences such as this.
5. Zaif ($60 Million)
Japan-based cryptocurrency exchange Zaif was hacked in September 2018 and $60 million was stolen in the process. The theft was possible after hackers gained authorised access into the exchanges hot wallets, making away with huge amounts of Bitcoin, Bitcoin Cash, and MonaCoin. The exchange’s asset reserve could not cover the loss, therefore it reached an agreement with a Japan-listed firm called Fisco to receive a $44.5 million investment in exchange for a major share of ownership.
4. Bitfinex ($77 Million)
The Bitfinex hack of August 2016 was a popular event that rocked the entire cryptocurrency industry. The hack occurred at a time when cryptocurrencies appeared to be shifting gears in terms of awareness and development. As a matter of fact, the aftermath of the event saw the Bitcoin price drop by 20%. After the hack, Bitfinex issued cryptographic tokens to its users that were affected by the hack, all of which the exchange announced to have bought back by April 2017.
3. BitGrail ($187 Million)
$187 million worth of Nano tokens were stolen from BitGrail in February 2018. The reported theft was announced weeks after the unauthorized transfer was initiated. This information was from evidence retrieved from the Nano blockchain explorer by skeptics. While BitGrail recognized the concerns of it users, it however stated that it is impossible for it to refund the stolen amount.
2. Mt. Gox ($460 Million)
The Mt. Gox scandal remains one of the biggest stains on the cryptocurrency industry. In February 2014, Mt. Gox was hacked and as much as $460 million was stolen from the exchange. In the wake of this, the exchange’s CEO, Mark Karpeles issued a statement that accepted responsibility on behalf of his company. “We had weaknesses in our system, and our bitcoins vanished. We’ve caused trouble and inconvenience to many people, and I feel deeply sorry for what has happened, “ he said. At the time, Mt. Gox was the world’s largest Bitcoin exchange that looked impressive from the outside, but many who claimed to know about the internal workings accused the company of a messy combination of poor management, neglect, and raw inexperience. The size of this event left a huge dent on the reputation of Bitcoin and the crypto industry at large. It took a long time before the market picked up again, and for users to regain confidence in the industry. The exchange has since gone down and ceased to exist.
1. Coincheck ($500 Million)
The biggest theft in the history of the cryptocurrency industry happened in January 2018, when Japan-based cryptocurrency exchange, Coincheck was hacked. A total of NEM tokens worth $500 million were stolen in the process. A statement from the exchange accepted the blame and took responsibility for the breach. According to reports, rather than storing its customers’ assets in offline wallets, the assets were stored in hot wallets that were connected to the internet. Coincheck also reportedly failed to protect the wallets with standard multi-signature security protocols. Having traced the destination of the stolen funds, NEM developers created a tracking tool that would allow exchanges to automatically reject stolen funds.
Hacks and massive theft of cryptocurrencies have contributed to the setback experienced by the technology. Each of the events takes a hit on the confidence of investors and willing participants who may not be sure of how the affected exchanges will handle the situation. The industry is however learning from past experiences, as the frequency of such hacks have reduced, while in some cases, modalities are being put in place to ensure that end users do not bear the brunt of such events, just like the case of Binance. The NEM developers’ response to the Coincheck hack has a way of rendering stolen funds unspendable, as long as other members of the community comply. However, no one knows how long this will last, and if the hackers will be able to nullify the traceability of the stolen coins yet. The action by the developers will discourage hackers and thieves, but is yet to restore value to the end users whose funds have been stolen. For the industry to grow as it should and become stable, security of funds need to be established. Exchanges and developers are continuously making efforts to ensure that funds and transactions within the industry remain safe at all times. http://bitcoinadvisor.info/top-10-of-the-biggest-cryptocurrency-hacks-and-scams-eve?fbclid=IwAR1aKdbjF1HQpFQq3jH6PQptxt7mhXHJWsABPnlN5ZEjmq07ByMEYWvVezM
Hi everybody, my name is Joanes Espanol and I am co-founder and CTO of Amberdata. Prior to founding Amberdata, I have worked on several large scale ingestion pipelines, distributed systems and analytics platforms, with a focus on infrastructure automation and highly available systems. I am passionate about information retrieval and extracting meaning from data. Amberdata is a blockchain and digital asset company which combines validated blockchain and market data from the top crypto exchanges into a unified platform and API, enabling customers to operate with confidence and build real-time data-powered applications.
What type of data does the API provide?
The advantage and uniqueness of Amberdata’s API is the combination of blockchain and pricing data together in one API call. We provide a standardized way to access blockchain data (blocks, transactions, account information, etc) across different blockchain models like UTXO (Bitcoin, Litecoin, Dash, Zcash...) and Account Based (Ethereum...), with contextualized pricing data from the top crypto exchanges in one API call. If you want to build applications on top of different blockchains, you would have to learn the intricacies of each distributed ledgers, run multiple nodes, aggregate the data, etc - instead of spending all that time and money, you can start immediately by using the APIs that we provide. What can you get access to? Accounts, account-balances, blocks, contracts, internal messages, logs and events, pending transactions, security audits, source code, tokens, token balances, token transfers, token supplies (circulating & total supplies), transactions as well as prices, order books, trades, tickers and best bid and offers for about 2,000 different assets. One important thing to note is that most of the APIs return validated data that anybody can verify by themselves. Blockchain is all about trust - operating in a hostile and trustless environment, maintaining consensus while continuously under attack, etc - and we want to make sure that we maintain that level of trust, so the API returns all the information that you would need to recalculate Merkle proofs yourself, hence guaranteeing the data was not tampered with and is authentique.
Why is it important to combine blockchain and market data?
Cryptoeconomics plays a key role in the blockchain world. One simple way to explain this is to look at why peer-to-peer file sharing systems like BitTorrent failed. These file sharing protocols were an early form of decentralization, with each node contributing to and participating in this “global sharing computer”. The issue with these protocols is that they relied on the good will of each participant to (re-)share their files - but without economic incentive, or punishment for not following the rules, it opened the door to bad behavior which ultimately led to its demise. The genius of Satoshi Nakamoto was to combine and improve upon existing decentralized protocols with game theory, to arrive at a consensus protocol able to circumvent the Byzatine’s General Problem. Now participants have incentives to follow the rules (they get financially rewarded for doing so by mining for example, and penalized for misbehaving), which in turn results in a stable system. This was the first time that crypto-economics were used in a working product and this became the base and norm for a lot of the new systems today. Pricing data is needed as context to blockchain data: there are a lot of (ERC-20) tokens created on Ethereum - it is very easy to clone an existing contract, and configure it with a certain amount of initial tokens (most commonly in the millions and billions in volume). Each token has an intrinsic value, as determined by the law of supply and demand, and as traded on the exchanges. Price fluctuations have an impact on the adoption and usage, meaning on the overall transaction volume (and to a certain extent transaction throughput) on the blockchain. Blockchain data is needed as context to market data: activity on blockchain can have an impact on market data. For example, one can look at the incoming token transfers in the Ethereum transaction pool and see if there are any impending big transfers for a specific token, which could result in a significant price move on the other end. Being able to detect that kind of movement and act upon it is the kind of signals that traders are looking for. Another example can be found with token supplies: exchanges want to be notified as soon as possible when a token circulating supply changes, as it affects their trading ability, and in the worst case scenario, they would need to halt trading if a token contract gets compromised. In conclusion, events on the blockchain can influence price, and market events also have an impact on blockchain data: the two are intimately intertwined, and putting them both in context leads to better insights and better decision making.
All the data you provide is publicly available, what gives?
Very true, all this data is publicly available, that is one of the premises and fundamentals of blockchain models, where all the data is public and transparent across all the nodes of the network. The problem is that, even though it is publicly available, it is not quick, not easy and not cheap to access. Not quick: blockchain data structures were designed and optimized for achieving consensus in a hostile and trustless environment and for internal state management, not for random access and overall search. Imagine you want to list all the transactions that your wallet address has participated in? The only way to do that would be to replay all the transactions from the beginning of time (starting at the genesis block), looking at the to and from addresses and retain only the ones matching your wallet: at over 500 million of transactions as of today, it will take some unacceptable amount of time to retrieve that list for a customer facing application. Not easy: Some very basic things that one would expect when dealing with financial assets and instruments are actually very difficult to get at, especially when related to tokens. For example, the current Ether balance of a wallet is easy to retrieve in one call to a Geth or Parity client - however, looking at time series of these balances starts to be a little hairy, as not all historical state is kept by these clients, unless you are running a full archive node. Looking at token holdings and balances gets even more complicated, as most of the token transfers are part of the transient state and not kept on chain. Moreover, token transfers and balance changes over time are triggered by different mechanisms (especially when dealing with contract to contract function calls), and detecting these changes accurately is prone to errors. Not cheap: As mentioned above, most of the historical data and time series metrics are only available via a full archive node, which at the time of writing requires about 3TB of disk space, just to hold all the blockchain state - and remember, this state is in a compressed and not easily accessible format. To convert it to a more searchable format requires much more space. Also, running your own full archive node requires constant care, maintenance and monitoring, which has become very expensive and prohibitive to run.
Who uses your API today and what do they do with it?
A wide variety of applications and projects are using our API, across different industries ranging from wallets and trust funds (DappRadar), to accounting and arbitrage firms (Moremath), including analytics (Stratcoins) and compliance & security companies (Blue Swan). Amberdata’s API is attractive to many different people because it is very complete and fast, and it provides additional data enrichment not available in other APIs, and because of these, it appeals to and fits nicely with our customers use cases: · It can be used in the traditional REST way to augment your own processes or enrich your own data with hard to get pieces of information. For example, lots of our users retrieve historical information (blocks and transactions) and relay it in their applications to their own customers, while others are more interested in financial data (account & token balances) and time series for portfolio management. https://medium.com/amberdata/keep-it-dry-use-amberdatas-api-9cdb222a41ba · Other projects are more in need of real-time up-to-date data, for which we recommend using our websockets, so you can filter out data in real-time and match your exact needs, rather than getting the firehose of information and having to filter out and discard 99% of it. · We have a few research projects tapping into our API as well. For example, some of our customers want access to historical market data to backtest their trading strategies and fine-tune their own algorithms. · Our API is also fully Json RPC compliant, meaning some people use it as a drop-in replacement for their own node, or as an alternative to Infura for example. We have some customers using both Amberdata and Infura as their web3 providers, with the benefits of getting additional enriched data when connecting to our API. · And finally, we have also built an SDK on top of the API itself, so it is easier to integrate into your own application (https://www.npmjs.com/package/web3data-js). We also have several subscriptions to match your needs. The developer tier is free and gets you access to 90% of all the data. If you are not sure about your usage patterns yet, we recommend the on-demand plan to get started, while for heavy users the professional and enterprise plans would be more adequate - see https://amberdata.io/pricing for more information. All and all, we try really hard to make it as easy as possible to use for you. We do the heavy lifting, so you don’t have to worry about all the minutia and you can focus on bringing value to your customers. We work very closely with our customers and continuously improve upon and add new features to our API. If something is not supported or you want something that is not in the API, chances are we already have the data, do not hesitate to ask us ;)
Amberdata recently made some headlines for discovering a vulnerability on Parity client. Can you tell us a bit more about it?
This is an interesting one. One of our internal processes flagged a contract, and more specifically the balanceOf(...) call: it was/is taking more than 5 seconds to execute (while typically this call takes only a few milliseconds). While investigating further, we started looking at the debug traces for that contract call and were pretty surprised when a combination of trace_call+vmTrace crashed our Parity node - and not just randomly, the same call would exhibit the exact same behavior each time, and on different Parity nodes. It turns out that this contract is very poorly written, and the implementation of balanceOf(...) keeps on looping over all the holders of the token, which eventually runs out of memory. Even though this is a pretty severe bug (any/all Parity node(s) can be remotely shutdown with just one small call to its API), in practice the number of nodes at risk is probably small because only operators who have enabled public facing RPC calls (and possibly the ones who have enabled tracing as well) are affected - which are both disabled by default. Kudos to the Parity team for fixing and releasing a patch in less than 24 hours after the bug was reported!
Amberdata just recently celebrated 2 years birthday. What is your proudest accomplishment? Any mistake/lesson you would like to share with us?
The blockchain and crypto market is one of the fastest evolving and innovating markets ever, and a very fast paced environment. Having been heads down for two years now, it is sometimes easy to lose sight of the big picture. The journey has been long, but I am happy and proud to see it all come together: we started with blockchain data and monitoring/alerting, added search, validation and derived data (tokens, supplies, etc) along the way, and finally market data to close the loop on all the cryptoeconomics. Seeing the overall engagement from the community around our data is very gratifying: API usage climbing up, more and more pertinent and relevant questions/suggestions on our support channels, other projects like Kadena sending us their own blockchain data so it can be included in Amberdata’s offering… all of these makes me want to do more :)
---Who are your competitors? What makes you better? There are a few data providers out there offering similar information as Amberdata. For example, Etherscan has very complete blockchain data for Ethereum, and CoinmarketCap has assets rankings by market cap and some pricing information. We actually did a pretty thorough analysis on the different data providers and they pros and cons: https://medium.com/amberdata/which-blockchain-data-api-is-right-for-you-3f3758efceb1 What makes Amberdata unique is three folds: ·Combination of blockchain and market data: typically other providers offer one or the other, but not both, and not integrated with each other - with Amberdata, in one API call I can get blockchain and historically accurate pricing data at the same time. We have also standardized access across multiple blockchains, so you get one interface for all and do not have to worry about understanding each and every one of them. ·Validated & verifiable data: we work hard to preserve transparency and trust and are very open about how our metrics are calculated. For example, blockchain data comes with all the pieces needed to recompute the Mekle proofs so the integrity of the data can be verified at any moment. Also, additional metrics like circulating supply are based on tangible and very concrete definitions so anybody can follow and recalculate them by themselves if needed. ·Enriched data: we have spent a lot of time enriching our APIs with (historical) off chain data like token names and symbols, mappings for token addresses and tradable market pairs, etc. At the same time, our APIs are very granular and provide a level of detail that only a few other providers offer, especially with market data (Level 2 with order books across multiple exchanges, Best Bid Offers, etc). That's all for the 40th AMA. We should like to thank all the community members for their participation and cooperation! Thanks, Joanes!
Soo after almost 3 months of setting up I have my own LN full node running on RP3
I have been eager to try LN mainnet since the very beginning of it. I've found out about lnd, eclair, zap and other wallets but every scenario I tried to use it failed because of critical issues:
eclair does not really constitute a wallet, it's more like a credit card - you can send money but not receive it
lnd is okay, but requires a server and tons of resources for maintaining a full node, can't be used securely, efficiently and mobily at the same time
zap offers some cloud wallet (in testnet!) by default, this is a serious misunderstanding of my cryptoanarchy needs
web wallets - ah, forget it
So I've decided to use my Raspberry Pi with a very old laptop HDD attached (200GB so the pruning function has to be used) to create a backend wallet service and zap desktop (temporarily!) as my frontend control panel. https://preview.redd.it/0vcq147887q11.png?width=1024&format=png&auto=webp&s=7bb6eccdd4110a857e5af0400acc2d7e1ee7ee85 Setting up Pi is easy, lots of tutorials over the internet, not gonna discuss it here. Then I had to obtain bitcoind (current rel: bitcoin-0.17.0-arm-linux-gnueabihf.tar.gz) and lnd (lnd-linux-armv7-v0.5-beta.tar.gz), create a bitcoin technical user, deploy the tools, configure and install new systemd services and go through the configs. This is a tricky part, so let's share:
# Generated by https://jlopp.github.io/bitcoin-core-config-generato # This config should be placed in following path: # ~/.bitcoin/bitcoin.conf # [core] # Set database cache size in megabytes; machines sync faster with a larger cache. Recommend setting as high as possible based upon machine's available RAM. dbcache=100 # Keep at most unconnectable transactions in memory. maxorphantx=10 # Keep the transaction memory pool below megabytes. maxmempool=50 # Reduce storage requirements by only storing most recent N MiB of block. This mode is incompatible with -txindex and -rescan. WARNING: Reverting this setting requires re-downloading the entire blockchain. (default: 0 = disable pruning blocks, 1 = allow manual pruning via RPC, greater than 550 = automatically prune blocks to stay under target size in MiB). prune=153600 # [network] # Maintain at most N connections to peers. maxconnections=40 # Use UPnP to map the listening port. upnp=1 # Tries to keep outbound traffic under the given target (in MiB per 24h), 0 = no limit. maxuploadtarget=5000 # [debug] # Log IP Addresses in debug output. logips=1 # [rpc] # Accept public REST requests. rest=1 # [wallet] # Do not load the wallet and disable wallet RPC calls. disablewallet=1 # [zeromq] # Enable publishing of raw block hex to . zmqpubrawblock=tcp://127.0.0.1:28332 # Enable publishing of raw transaction hex to . zmqpubrawtx=tcp://127.0.0.1:28333 # [rpc] # Accept command line and JSON-RPC commands. server=1 # Username and hashed password for JSON-RPC connections. The field comes in the format: :$. RPC clients connect using rpcuser=/rpcpassword= arguments. You can generate this value with the ./share/rpcauth/rpcauth.py script in the Bitcoin Core repository. This option can be specified multiple times. rpcauth=xxx:yyy$zzz
Whooaa, this online config generator is really helpful, but I still had to manually correct a few things. The last line is obviously generated by rpcauth.py, I disabled the wallet functionality as lnd is going to take care of my funds. ZMQ is not available to the network so only my LND can use it, RPC usage I still have to think through a little, in general I would like to have my own block explorer some day but also be safe from any hacking attempts (thus I would need at least 2 RPC ports/user accounts - one for lnd, one for block explorer frontend). No ports open on firewall at this time, only UPnP is active and gently opens 8333 for block/tx transfers. Now, synchronizing the blockchain took me time from mid-July to early September... The hard drive is really slow, also my external HDD drive has some trouble with its A/C adapter so Pi was getting undervoltage alerts all the time. Luckily, it is just downclocking when it happens and slowly but steadily synchronized the whole history. After all, I'm not paying even $5 monthly for a VPS, it is by design the cheapest hardware I could use to set up my LN wallet. When bitcoind was ready (I've heard some stories about btcd but I don't trust this software yet, sorry), it's time to configure lnd.conf:
Here I've had to XXX a little more fields, as not only the bitcoind RPC credentials are stored here, but also my node's public information (it should be illegal to run nodes without specifically selected color and alias!). It is public (and I had to open port 9735 on my firewall), but not necessarily connected to my reddit account for most of the adversaries, so let's keep it this way. In fact, I also see a security vulnerability here: my whole node's stability depends on the IP being static. I could swap it for a .tk domain but who can tell if the bad guys won't actively fight DNS system in order to prevent global economic revolution? As such, I would rather see node identification in LN based on a public key only with possible *hints* of last-known-ip-address but the whole discovery should be performed by the nodes themself in a p2p manner, obviously preventing malicious actors from poisoning the network in some way. For now, I consider the IP stability a weak link and will probably have to pay extra Bitcoin TX fees when something happens to it (not much of a cost luckily!). https://preview.redd.it/hjd1nooo77q11.png?width=741&format=png&auto=webp&s=14214fc36e3edf139faade930f4069fc31a3e883 Okay then, lnd is up and running, had to create a wallet and give it a night for getting up to speed. I don't know really what took it so long, I'm not using Windows nor 'localhost' in the config so the issues like #1027 are not the case. But there are others like #1545 still open so I'm not going to ponder much on this. I haven't really got any idea how to automatically unlock the wallet after Pi restart (could happen any time!), especially since I only tried to unlock it locally with lncli (why would I enter the password anywhere outside that host?), but let's say that my wallet will only be as stable as my cheap hardware. That's okay for the beta phase. Finally, zap-desktop required me to copy tls.cert and admin.macaroon files to my desktop. If my understanding of macaroon (it's like an authentication cookie, that can later be revoked) is correct then it's not an issue, however it would be nice to have a "$50 daily limit" macaroon file in the future too, just to avoid any big issues when my client machine gets stolen. Thanks to this, I can ignore the silly cloud-based modes and have fully-secure environment of my home network being the only link from me to my money. https://preview.redd.it/11bw3dgw47q11.png?width=836&format=png&auto=webp&s=b7fa7c88d14f22441cbbfc0db036cddfd7ea8424 Aaand there it is. The IP took some time to advertise, I use 1ml.com to see if my node is there. The zap interface (ZapDesktop-linux-amd64-v0.2.2-beta.deb) lacks lots of useful information so I keep learning lncli syntax to get more data about my new peers or the routes offered. The transactions indeed run fast and are ridiculously cheap. I would really love to run Eclair with the same settings but it doesn't seem to support custom lnd (why?). In fact, since all I need is really a lncli wrapper, maybe it will be easy to write my own (seen some web gui which weighs 700MB after downloading all dependencies with npm - SICK!). Zap for iOS alpha test registration is DOWN so I couldn't try it (and I'm not sure if it allows custom lnd selection), Zap for Android doesn't even exist yet... I made a few demo transactions and now I will explore all those fancy t-shirt stores as long as the prices are still in "early investor" mode - I remember times when one could get 0.001 BTC from a faucet... https://preview.redd.it/42sdyoce57q11.png?width=836&format=png&auto=webp&s=7ec8917eaf8f3329d51ce3e30e455254027de0ee If you find any of the facts presented by me false, I am happy to find out more in the discussion. However what I did I did mostly for fun, without paying much attention to the source code, documentation and endless issue lists on github. By no means I claim this tutorial will work for you but I do think I shared the key points and effort estimations to help others decide if they want a full-node LN client too. I'm also interested in some ideas on what to do with it next (rather unlikely that I will share my lnd admin.macaroon with anyone!) especially if it gives me free money. For example, I can open 1000 channels and start earning money from fees, although I no longer have more Bitcoins than the LN capacity yields... I will probably keep updating the software on my Pi until it leaves beta phases and only then will pour more money inside. I'm also keen on improving the general security of my rig and those comments I will answer more seriously.
Hey folks, I have begun work to create a new Bitcoin GUI header. I am doing this for several reasons:
Bitcoin-qt doesn't support SegWit
Bitcoin-qt frequently freezes on some systems
I have written a Java framework for interaction with the Bitcoin network (through bitcoind and JSON RPC). This framework allows for very rapid development.
Conventional full-node clients often take a long time to process updates; CBitcoin is aimed at rapidly pushing through updates while remaining safe to use.
Why not? It's fun!
What will CBitcoin (the new GUI header) be? CBitcoin will be a new GUI header as mentioned above. Among some things, it will support SegWit, it'll combine a GUI and command prompt into one single program and once LN is more developed, it'll integrate that as well. You can find the project on my website: http://cowlite.nl/cbitcoin.php and on Github: https://github.com/WJongkind/CBitcoin During the development of CBitcoin, a strong and easy-to-use framework will be written in Java for interaction with the Bitcoin Network, based on the Bitcoin Core's bitcoind and it's JSON RPC API. Eventually it might be decided that this framework will become a entire project on it's own, but we are not that far yet. You can read more details about the project on my website: http://cowlite.nl/cbitcoin.php. The entire project is open-source and will remain that way for obvious reasons: the software will be trusted, people can contribute to the code and people can borrow code for their own projects. Looking for contributors Currently, I am the only developer of the software. I do this in my spare time as a hobby and I do not earn any form of payment for it (however, people do have the option to donate). I am sure I could write the software entirely myself, though that would probably take a significant amount of time. Therefore I am asking any programming enthusiasts out there that have spare time to lend a hand. On the GitHub page & on my website there are instructions on how you can become part of the project. Donations will be split up amongst all contributors.
Enclosed find a signed 1mb txn (999,957 bytes), that if mined will fork the network. TxnID: bbb67fc3320d1e9a58c7cd0bb5ead2cff87b243e089e4a21dad669ba28703f32 The outputs of this transaction have the following function, designated by their prefix:
1fork... any confirmed funds sent to these 12 addresses will be respent as child txn's of the 1mb txn. The balance of these addresses will be spent once every 24 hours, staggered 2hrs apart, and will make use of an input from the 1mb txn, to tie the funds to the forked chain. As luke-jr highlights below the above method contains risk, so alternatively this can be done trustless by setting up a MultiSig. PM me for setting up a MS for crowdfunding fees to miners.
Full Public Key of one output for MS creation (Make sure to keep the RedeemScript, as it will be needed to sign/spend) 04130ae250d4cd1d183d77b423fe9a137ce99e3dc4a787d67ff34aa4dfefefd598cd683b9224b4a0e6599a9834d13d7607c1ba8fc3e8b77f23f3f05f105370459f
1FauceTVQhmYduXkt965ZFYYqt1znknwet funds sent to this address will receive a small output (~10,000 satoshi) to the same address. If the input transaction contains more than one input address, the vout = 0 addressed will be used for the post-fork output. These coins can be used to split pre fork funds, and prevent relay on both chains. All funds on the pre-fork chain will be refunded post fork. (This is NOT a splitter contract like ETH, there is no need to send large amounts)
1DoNATEdkKiZZCedwS6bueYHCAx98i6vEJ any funds here will be donated to the owner of this address.
Accordingly, the only thing you need to accept bitcoins is a bitcoin client on the server. It is called bitcoind, it’s just a console version of the client, with all the same familiar functionality. It works through the JSON-RPC protocol, is located under port 8332. All that remains after installation is to set up the client and Node.js. Install Bitcoind . To install, you will need to run ... Bitcoin supports SSL (https) JSON-RPC connections beginning with version 0.3.14. See the rpcssl wiki page for setup instructions and a list of all bitcoin.conf configuration options. Allowing arbitrary machines to access the JSON-RPC port (using the rpcallowip configuration option) is dangerous and strongly discouraged-- access should be strictly limited to trusted machines. To access the ... A lightweight Java bitcoin JSON-RPC client binding License: Apache 2.0: Tags: bitcoin client rpc: Used By: 1 artifacts: Central (5) Bitcoin Core JSON-RPC client. GitHub Gist: instantly share code, notes, and snippets. Skip to content. All gists Back to GitHub. Sign in Sign up Instantly share code, notes, and snippets. erukiti / client.ts. Last active Apr 9, 2019. Star 1 Fork 0; Code Revisions 2 Stars 1. Embed . What would you like to do? Embed Embed this gist in your website. Share Copy sharable link for this gist. Clone ... Bitcoin-JSON-RPC-Client is a lightweight Java bitcoin JSON-RPC client binding. It does not require any external dependencies. Code Example
Bitcoin JSON-RPC Tutorial 2 - VPS Setup - Duration: 6:28. m1xolyd1an 14,440 views. 6:28. Steve Jobs introduces iPhone in 2007 - Duration: 10:20. John Schroter Recommended for you. 10:20 . The ... Bitcoin JSON-RPC tutorial. Getting started with the bitcoin command line interface. My Book: https://www.amazon.com/Building-Bitcoin-Websites-Beginners-Devel... Bitcoin JSON-RPC tutorial. How to set up bitcoind on a VPS. BTC: 1NPrfWgJfkANmd1jt88A141PjhiarT8d9U RPC and Client Server Systems - Georgia Tech - Advanced Operating Systems - Duration: 3 ... Bitcoin JSON-RPC Tutorial 3 - bitcoin.conf - Duration: 8:10. m1xolyd1an 13,342 views. 8:10 . Web ... Bitcoin JSON-RPC tutorial. How to set up and use bitcoind wallet notify feature. How to set up and use bitcoind wallet notify feature. My Book: Building Bitcoin Websites - https://www.amazon.com ...