evojs-lib

This is an extend lib for bitcoinjs-lib. It extends the network type of bitcoinjs-lib. It also provides an useful lib to help you building EVO transactions.

Installation

npm install evojs-lib

Setup

Node.js

var qtumjs = require('evojs-lib')

New features

Network

{
    evo: {
        messagePrefix: '\x18Evo Signed Message:\n',
        bech32: 'ec',
        bip32: {
            public: 0x0488b21e,
            private: 0x0488ade4
        },
        pubKeyHash: 0x00,
        scriptHash: 0x05,
        wif: 0x80
    },
    evo_testnet: {
        messagePrefix: '\x18Coinevo Signed Message:\n',
        bech32: 'te',
        bip32: {
            public: 0x043587cf,
            private: 0x04358394
        },
        pubKeyHash: 0x78,
        scriptHash: 0x6e,
        wif: 0xef
    }
}

Utils

Utils.selectTxs

/**
 * This is a function for selecting EVO utxos to build transactions
 * the transaction object takes at least 3 fields, value(unit is 1e-8 EVO) , confirmations and isStake
 *
 * @param [transaction] unspentTransactions
 * @param Number amount(unit: EVO)
 * @param Number fee(unit: EVO)
 * @returns [transaction]
 */
function selectTxs(unspentTransactions, amount, fee)

Utils.buildPubKeyHashTransaction

/**
 * This is a helper function to build a pubkeyhash transaction
 * the transaction object takes at least 5 fields, value(unit is 1e-8 EVO), confirmations, isStake, hash and pos
 *
 * @param bitcoinjs-lib.KeyPair keyPair
 * @param String to
 * @param Number amount(unit: EVO)
 * @param Number fee(unit: EVO)
 * @param [transaction] utxoList
 * @returns String the built tx
 */
function buildPubKeyHashTransaction(keyPair, to, amount, fee, utxoList)

Utils.buildCreateContractTransaction

/**
 * This is a helper function to build a create-contract transaction
 * the transaction object takes at least 5 fields, value(unit is 1e-8 EVO), confirmations, isStake, hash and pos
 *
 * @param bitcoinjs-lib.KeyPair keyPair
 * @param String code The contract byte code
 * @param Number gasLimit
 * @param Number gasPrice(unit: 1e-8 EVO/gas)
 * @param Number fee(unit: EVO)
 * @param [transaction] utxoList
 * @returns String the built tx
 */
function buildCreateContractTransaction(keyPair, code, gasLimit, gasPrice, fee, utxoList)

Utils.buildSendToContractTransaction

/**
 * This is a helper function to build a send-to-contract transaction
 * the transaction object takes at least 5 fields, value(unit is 1e-8 EVO), confirmations, isStake, hash and pos
 *
 * @param bitcoinjs-lib.KeyPair keyPair
 * @param String contractAddress The contract address
 * @param String encodedData The encoded abi data
 * @param Number gasLimit
 * @param Number gasPrice(unit: 1e-8 EVO/gas)
 * @param Number fee(unit: EVO)
 * @param [transaction] utxoList
 * @returns String the built tx
 */
function buildSendToContractTransaction(keyPair, contractAddress, encodedData, gasLimit, gasPrice, fee, utxoList)