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EthereumAdvent Calendar 2019

Day 1

【ethereumjs-tx】署名付きトランザクションデータ作成【Ethereum】

Last updated at Posted at 2017-12-12

ブラウザベースのethereumjs-txを使うメモ

ethereumjs-tx読み込み

<script src="ethereumjs-tx-1.3.3.min.js" type="text/javascript"></script>

ブラウザベースではグローバル変数 ethereumjs を使う(EthJSでなく)

ex.

function createRawTxData(nonce,gasPrice,gasLimit,to,value,data,privateKey) {
  
    var rawTx = {};
    
    rawTx['nonce'] = nonce;
    rawTx['gasPrice'] = gasPrice;
    rawTx['gasLimit'] = gasLimit;
    rawTx['to'] = to;
    rawTx['value'] = value;
    rawTx['data'] = data;
    
    var tx = new ethereumjs.Tx(rawTx);

    // Buffer.Buffer はタイポでないです
    var pk = new ethereumjs.Buffer.Buffer(privateKey, 'hex');

    tx.sign(pk);
    
    return tx.serialize().toString('hex');

    // output
    // 0xf86180820834820a9694a813cb047ffd55848bed64bf8cbaa325b4ea620780802ba025d4323cb9564aab68be0ca3b26b195c26d5b0a0bd0a5c774786e2684e242840a03b0ed69cf748bc7f3e3aacda668fbf7eef6c1f662eb71fc61fe7ab70b76c817d
}

github: ethereumjs-tx(browser-builds)
cf(Stack Over Flow). how to use ethereumjs-tx.js in a browser

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