Use https://remix.ethereum.org Get Contract json and data. In remix website, Compile finish. See Compliation Details. 1. ABI： click ABI buttion, get data. Use http://jsonviewer.stack.hu/ remove space 2. Compliation Details -> WEB3DEPLOY -> get data 3. cContract.options.from need put correct. var Web3 = require("web3"); var provider = new Web3.providers.HttpProvider("http://ganache:8545"); var web3 = new Web3(provider); //abi var cContract = new web3.eth.Contract([{"constant":false,"inputs":[{"name":"x","type":"uint256"}],"name":"set","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"get","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"}]) //bytecode cContract.options.data = '0x608060405234801561001057600080fd5b5060bf8061001f6000396000f30060806040526004361060485763ffffffff7c010000000000000000000000000000000000000000000000000000000060003504166360fe47b18114604d5780636d4ce63c146064575b600080fd5b348015605857600080fd5b5060626004356088565b005b348015606f57600080fd5b506076608d565b60408051918252519081900360200190f35b600055565b600054905600a165627a7a72305820765480c908e5e28e3233e18bfa422944b42cad5fc08b77d7b22d3ddd7016a1380029' cContract.options.from = '0xoooxxxoooxxxoooxxxoooxxxoooxxx' cContract.options.gas = '4700000' console.

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HDWalletProvider engine.stop() p = HDWalletProvider(MNEMONIC_SYSTEM, "http://ganache:8545", 0); p.engine.stop(); HDWalletProvider engine.stop() and pool export function GetHdProvider(id: number, rpcurl: string) { //return new HDWalletProvider(MNEMONIC_SYSTEM, url, id); return id==0?Provider1Pool.acquire():Provider2Pool.acquire(); } // Normal use const hdProvider0 = await GetHdProvider(0, providerUrl).then(function(client) {return client}).catch(function(err) {throw new HttpException(err.toString(), HttpStatus.BAD_REQUEST);}); const hdProvider1 = await GetHdProvider(1, providerUrl).then(function(client) {return client}).catch(function(err) {throw new HttpException(err.toString(), HttpStatus.BAD_REQUEST);}); // Normal release ReleaseHDProvider1(hdProvider1 ); // Pool code const genericPool = require("generic-pool"); const opts = { max: 10, // maximum size of the pool min: 2, // minimum size of the pool idleTimeoutMillis: 30000, log: true }; const factory0 = { // maybe different parms create: function() { return new HDWalletProvider(MNEMONIC_SYSTEM, RPCURL, 0); }, destroy: function(client) { client.

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sol file put in ~/contracts/sol File list ~/contracts/sol/Contracts.sol RUN docker run -v ~/contracts:/sources ethereum/solc:0.4.23 -o /sources --abi --bin /sources/sol/Contract.sol File list ~/contracts/sol/Contracts.sol ~/contracts/Contracts.abi ~/contracts/Contracts.bin 0.4.23 check your contract version. This example is pragma solidity ^0.4.23; sol name need be changeed. This example is Contract.sol Permission denied just use root RUN docker run -v ~/contracts:/sources ethereum/client-go:alltools-v1.9.2 abigen --abi /sources/Contract.abi --pkg contracts --type Contract --out /sources/Contract.go --bin /sources/Contract.bin File list ~/contracts/sol/Contracts.

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https://medium.com/taipei-ethereum-meetup/%E4%BD%BF%E7%94%A8-go-%E8%88%87%E4%BB%A5%E5%A4%AA%E5%9D%8A%E5%8D%80%E5%A1%8A%E9%8F%88%E4%BA%92%E5%8B%95-%E4%B8%89-7b7b1f40c06a https://github.com/sc0Vu/go-eth

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https://github.com/gobitfly/etherchain-light

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https://github.com/adrianmcli/web3-vs-ethers

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https://medium.com/@antonassocareer/web3-secp256k1-%E7%B0%BD%E7%AB%A0%E8%88%87solidity%E9%A9%97%E7%AB%A0-26ded518cfdc phone vs secp256k1 vs ethereumjs-util 那代表 phone 產生的是符合ethereum的格式 但因為 signed的長度不符合標準的 secp256k1 ，所以只能用ethereumjs-util的工具，從fromRpcSig 匯入處理，取得 s r v ，後就能進行處理了！ Elliptic 和 secp256k1 各別需要不同的方式，請閱code const secp256k1 = require('secp256k1') const ejsu = require('ethereumjs-util') Web3 = require("web3") var web3 = new Web3(Web3.givenProvider || 'ws://some.local-or-remote.node:8546'); // phone // private key // address 0xAD44A8ea9A9Bb5eF66F041BB921A687331729eB4 // Message Signature Has 0xa05ac71b16172777f683edbc48e9709cffd713a82630232d7c98e0f0df5201d60329658dba83b53fed49307e03d9663c0d2e4476c8b7925c2ed02cc7f881f5271b // Message Hello // public key 034e17dc4aef81e0ce6d16686be5e194274795375fc5525f1cdc46fe0b4643d5d6 console.log("\n----- phone -----\n") var buf_Signed = Buffer.from(web3.utils.hexToBytes("0xa05ac71b16172777f683edbc48e9709cffd713a82630232d7c98e0f0df5201d60329658dba83b53fed49307e03d9663c0d2e4476c8b7925c2ed02cc7f881f5271b")) var buf_pubkey = Buffer.

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