$ mkdir rinkeby
$ cd rinkeby
$ npm init
{
"name": "inbox",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"author": "",
"license": "ISC"
}
solidityのcompilerをinstall
$ npm install –save solc
mocha(テストフレーム)をinstall
$ npm install –save mocha ganache-cli web3@1.0.0-beta.26
truffle-hdwallet-providerをインストール
$ npm install –save truffle-hdwallet-provider@0.0.3
const path = require('path');
const fs = require('fs');
const solc = require('solc');
const inboxPath = path.resolve(__dirname, 'contracts', 'Inbox.sol');
const source = fs.readFileSync(inboxPath, 'utf8');
moudle.exports = solc.compile(source,1).contracts[':Inbox'];
Inbox.sol
pragma solidity ^0.8.11;
contract Inbox {
string public message;
function Inbox(string initialMessage) public {
message = initialMessage;
}
function setMessage(string newMessage) public {
message = newMessage;
}
}
deploy.js
const HDWalletProvider = require('truffle-hdwallet-provider');
const Web3 = require('web3');
const { interface, bytecode } = require('./compile');
const provider = new HDWalletProvider (
'harmonic',
'https://ropsten.infura.io/v3/*'
);
const web3 = new Web3(provider);
const deploy = async () => {
const accounts = await web3.eth.getAccounts();
console.log('Attempting to deploy from account', accounts[0]);
const result = await new web3.eth.Contract(JSON.parse(interface))
.deploy({data: bytecode, arguments:['Hi there!']})
.send({gas:'1000000', from: accounts:[0]});
console.log('Contract deploy to', result.options.address);
}
$ node deploy.js
Attempting to deploy from account *
(node:408216) UnhandledPromiseRejectionWarning: Error: intrinsic gas too low
うーむ、gasの設定の方法がよくわかん
gasの概念の理解が先か…
