OfflineSignProvider

This is a customized Ethereum web3-provider to facilitate separation of business layer and wallet layer

Install

$ npm install libra-offlinesign-provider

General Usage

You can use this provider wherever a Web3 provider is needed.

const config = require('../config');
var Web3 = require('web3');
var nodeUrl = 'http://127.0.0.1:8545';

var web3 = new Web3(new Web3.providers.HttpProvider(nodeUrl));

var abi = require("./contract.json");
var TruffleContract = require("truffle-contract");

var signServiceUrl = 'http://127.0.0.1:8080/api/pearl/v1/eth/sign_transaction';

var providerNew = new OfflineSignProvider(nodeUrl, signServiceUrl, [account1,account2,...], config.aesKey, false);

var contractAddress = "0xafc60ddf39e7a953c4d341f2f4a80accf3432b76";
var myContract = TruffleContract({ abi: abi });
myContract.setProvider(providerNew);
myContract.defaults({ from: "0xd7358e66c2ec3e398b39567b0c9f53a8e8c6000f" });
var web3 = new Web3(providerNew);

myContract.at(contractAddress).then(function (instance) {
                console.log(instance)
            }).catch(e => {
                reject(e);
            });
            

Parameters:

var providerNew = new OfflineSignProvider(nodeUrl, signServiceUrl, [account1,account2,...], config.aesKey);

param1: The eth network node url.

param2: The signature service url.

param3: Array format account address, that sign service will use one of them to signature the transaction data .

param4: AES key defined with the signature service.

param5: Use 0Ex or not.