主页 > 安卓版imtoken钱包打 > 查询私链和主链上以太坊和代币余额
查询私链和主链上以太坊和代币余额
安卓版imtoken钱包打 2023-02-12 07:25:28
安装介绍
npm install web3
web3.js查询ether和token余额并转账ether和token
查询私链和主链上以太坊和代币余额
私有链和主链查询方式相同
主链地址,可以去infura申请
合同阿比。 合约的abi。 你可以得到它以太坊购买代币,如果代币合约提供了代码以太坊购买代币,就会有abi
// 引入web3 var Web3 = require('web3'); if (typeof web3 !== 'undefined') { web3 = new Web3(web3.currentProvider); } else { // web3 = new Web3(new Web3.providers.HttpProvider("http://localhost:7545")); web3 = new Web3(new Web3.providers.HttpProvider("https://mainnet.infura.io/yourAddress")); } // 定义合约abi var contractAbi = [{"constant":true,"inputs":[],"name":"mintingFinished","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"cap","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"unpause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_amount","type":"uint256"}],"name":"mint","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_value","type":"uint256"}],"name":"burn","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"paused","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_subtractedValue","type":"uint256"}],"name":"decreaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[],"name":"finishMinting","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"pause","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_addedValue","type":"uint256"}],"name":"increaseApproval","outputs":[{"name":"success","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"burner","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Burn","type":"event"},{"anonymous":false,"inputs":[],"name":"Pause","type":"event"},{"anonymous":false,"inputs":[],"name":"Unpause","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"amount","type":"uint256"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[],"name":"MintFinished","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]; // 合约地址 var contractAddress = "0x7FCCF800568747b178c6cBbe4Bf3d147df75ac61"; // 账号 var currentAccount = "0x4e9d5c58d8d6f02FFe5A6EF10CB804FfFB556bBb"; // 定义合约 var myContract = new web3.eth.Contract(contractAbi, contractAddress, { from: currentAccount, // default from address gasPrice: '10000000000' // default gas price in wei, 10 gwei in this case }); // 查询以太币余额 web3.eth.getBalance(currentAccount).then(console.log); // 查看某个账号的代币余额 myContract.methods.balanceOf(contractAddress).call({from: currentAccount}, function(error, result){ if(!error) { console.log(result); } else { console.log(error); } });
这里还可以查询代币的名称、符号、小数位、发行总量等,因为代币合约一般都符合ERC标准,有这些基本方法。即使你有合约代码和abi,也可以也调用合约的其他方法。 当然调用一些方法需要权限和前置条件
// 获得代币名称 myContract.methods.name().call({from: currentAccount}, function(error, result){ if(!error) { console.log(result); } else { console.log(error); } }); // 获取代币符号 myContract.methods.symbol().call({from: currentAccount}, function(error, result){ if(!error) { console.log(result); } else { console.log(error); } }); // 获取代币总量 myContract.methods.totalSupply().call({from: currentAccount}, function(error, result){ if(!error) { console.log(result); } else { console.log(error); } }); // 查看某个账号允许另一个账号可使用的代币数量 myContract.methods.allowance(sender, spender).call({from: currentAccount}, function(error, result){ if(!error) { console.log(result); } else { console.log(error); } });
在私有链上转移以太坊和代币
// 以太币转账 web3.eth.sendTransaction({ from: currentAccount, to: receiverAccount, value: '1000000000000000' }) .then(function(receipt){ console.log(receipt); }); // 代币转账 myContract.methods.transfer(to, amount).send({from: currentAccount}), function(error, transactionHash){ if(!error) { console.log('transactionHash is ' + transactionHash); } else { console.log(error); } });
在主链上转移以太坊和代币
以上方法只适用于私链。 因为你在私链上的账户本地有私钥,在主链上写数据的方法需要获取账户私钥并对交易进行签名,所以使用了web3.eth.sendSignedTransaction方法-文档
npm install ethereumjs-tx
以太坊转账
// 引入ethereumjs-tx var Tx = require('ethereumjs-tx'); // 以太币转账 // 先获取当前账号交易的nonce web3.eth.getTransactionCount(currentAccount, web3.eth.defaultBlock.pending).then(function(nonce){ // 获取交易数据 var txData = { // nonce每次++,以免覆盖之前pending中的交易 nonce: web3.utils.toHex(nonce++), // 设置gasLimit和gasPrice gasLimit: web3.utils.toHex(99000), gasPrice: web3.utils.toHex(10e9), // 要转账的哪个账号 to: '0x3b11f5CAB8362807273e1680890A802c5F1B15a8', // 从哪个账号转 from: currentAccount, // 0.001 以太币 value: web3.utils.toHex(10e14), data: '' } var tx = new Tx(txData); // 引入私钥,并转换为16进制 const privateKey = new Buffer('your account privateKey', 'hex'); // 用私钥签署交易 tx.sign(privateKey); // 序列化 var serializedTx = tx.serialize().toString('hex'); web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'), function(err, hash) { if (!err) { console.log(hash); } else { console.error(err); } }); });
代币转移
// 补齐64位,不够前面用0补齐 function addPreZero(num){ var t = (num+'').length, s = ''; for(var i=0; i<64-t; i++){ s += '0'; } return s+num; } web3.eth.getTransactionCount(currentAccount, web3.eth.defaultBlock.pending).then(function(nonce){ // 获取交易数据 var txData = { nonce: web3.utils.toHex(nonce++), gasLimit: web3.utils.toHex(99000), gasPrice: web3.utils.toHex(10e9), // 注意这里是代币合约地址 to: contractAddress, from: currentAccount, // 调用合约转账value这里留空 value: '0x00', // data的组成,由:0x + 要调用的合约方法的function signature + 要传递的方法参数,每个参数都为64位(对transfer来说,第一个是接收人的地址去掉0x,第二个是代币数量的16进制表示,去掉前面0x,然后补齐为64位) data: '0x' + 'a9059cbb' + addPreZero('3b11f5CAB8362807273e1680890A802c5F1B15a8') + addPreZero(web3.utils.toHex(1000000000000000000).substr(2)) } var tx = new Tx(txData); const privateKey = new Buffer('your account privateKey', 'hex'); tx.sign(privateKey); var serializedTx = tx.serialize().toString('hex'); web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex'), function(err, hash) { if (!err) { console.log(hash); } else { console.error(err); } }); });
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