Crypto interaction

About crypto interaction

Crypto interaction is a module of the crypto2bot that allows you to interact with the Bitcoin blockchain. It is planned to support other cryptocurrencies, such as Ethereum, Litecoin, etc.

The module is currently under active development, so we dont recommend using it in production.

Features

• Сreate multi-signature wallets
• Сreate and send transactions from a multi signature wallet
• TypeScript typings

Shortcuts

• Install
• Usage
• API docs

Install

yarn

• yarn add crypto-interaction

npm

• npm i crypto-interaction

Usage

Create multisignature wallet

import { bitcoin } from 'crypto-interaction';
const testnet = bitcoin.networks.testnet;

const keyPairs = new bitcoin.Msint(testnet).generateKeyPairs();
const wallet = new bitcoin.Wallet(testnet, keyPairs);
const address = wallet.create();
console.log(address)

Create transaction and sign it

import { bitcoin } from 'crypto-interaction';
const testnet = new bitcoin.Network().getTestnet()
const FEE = 10000;

const tx = new bitcoin.Transaction(testnet).create();
let input = new bitcoin.NodeInt(API);
let hash = await input.getHash(address);
console.log(hash);

const key1 = 'cMorAV1Ww74rbQAq1v5LRahB7BQ7LQNAThiJjtum1BepXzxnQ38x'
const key2 = 'cVzM1Ukhx3pwvyAikBEnUvN8vNeviRdswuZFP6cwiLxpg7j1t8wY'

let script = await input.getScriptPubKey(address)
console.log(script)

let balance = await input.getBalance(address)
console.log(balance)

// Gets hash, script and fullAmount and after ->
tx.addInput(hash, script, balance)

// Gets buyer address, amount and after ->
const recipient = 'tb1qxs488h7tmk5w6axeht5zvgwts8w48s2fhge4yskmv8pskdplsdesquf922';
// const transferAmount = 10000
tx.addOutput(recipient, balance, FEE)

// waiting for confirmation and after sign tx (1/3)

tx.sign(key1)

// waiting for confirmation and after sign tx (2/3)

tx.sign(key2)

// finalize and broadcast
tx.broadcast()

API

Msint

Msint - utility module, containing the following functions:

generateKeyPairs

Function for generating KeyPairs.

Usage

import { bitcoin } from 'crypto-interaction';

let NETWORK = bitcoin.networks.testnet;

const msint = new bitcoin.Msint(NETWORK);
const keyPairs = msint.generateKeyPairs();

pubKeysFromKeyPairs

Function for getting public keys from KeyPairs.

Args

• keyPairs

Usage

const publicKeys = msint.pubKeysFromKeyPairs(keyPairs);

getRedeemScript

Function for generating Redeem Script.

Args

• pubKeys

Usage

const redeemScript = msint.getRedeemScript(pubKeys);

keyPairsFromWIFs

Function for getting key pairs from WIFs.

Args

• WIFs

Usage

let keyPairs = msint.keyPairsFromWIFs(WIFs);

bufferFromHex

Function for getting Buffer from Hex.

Args

• hex

Usage

let buffer = msint.bufferFromHex(hex);

Wallet

Wallet - module for interacting with the wallet, containing the following functions:

create

Function for creating an address.

Usage

import { bitcoin } from 'crypto-interaction';
let NETWORK = bitcoin.networks.testnet

const wallet = new bitcoin.Wallet(NETWORK, keyPairs);
const address = wallet.create();

getInfo

Function for getting information about the wallet.

Usage

const Info = wallet.getInfo();

const address = info.address;
const redeem = info.redeem;
const WIFs = info.WIFs;
const pubKeys = info.pubKeys;

Transaction

Transaction - module for creating and interacting with transactions, which includes the following functions:

create

Function for creating a transaction.

Usage

import { bitcoin } from 'crypto-interaction';
let NETWORK = bitcoin.networks.testnet;

const tx = new bitcoin.Transaction(NETWORK).create();

addInput

Function for adding input to a transaction.

Args

• hash - hash of the previous transaction
• script - script pub key
• balance

Usage

tx.addInput(hash, script, balance);

addOutput

Function for adding output to a transaction.

Args

• recipient - recipient address
• balance
• fee - transaction fee

Usage

tx.addOutput(recipient, balance, fee);

sign

Function for signing a transaction.

Args

• WIF

Usage

tx.sign(key1);
tx.sign(key2);

broadcast

Function publishes the transaction to the blockchain.

Usage

tx.broadcast()

NodeInt

NodeInt - module for interacting with the bitcoin blockchain via the fetch API, includes the following functions:

getHash

Function for getting the hash of the previous transaction.

Args

• address

Usage

const API = 'https://api.blockcypher.com/v1/btc/test3'
const address = wallet.create();

let input = new bitcoin.NodeInt(API);
let hash = await input.getHash(address);

getScriptPubKey

Function for getting the script public key.

Args

• address

Usage

let script = await input.getScriptPubKey(address)

getBalance

Function for getting the address balance.

Args

• address

Usage

let balance = await input.getBalance(address);