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javascript - 编码为十六进制字符串：参数必须是字符串 node.js

问题描述

我正在尝试在超级账本锯齿中实现一个简单的交易流程，为了创建交易，它必须通过一些步骤

/*
* Create the transactions
*/
const createTransaction = function createTransaction(transactionHeaderBytes, payloadBytes) {

    const signature = signer.sign(transactionHeaderBytes)

    console.log(signature);

    return transaction = protobuf.Transaction.create({
        header: transactionHeaderBytes,
        headerSignature:Buffer.from(signature, "hex"),
        payload: payloadBytes
    });
}

我需要编码headerSignature为十六进制字符串，但出现以下错误

Argument must be a string

但是console.log(signature);给出了以下结果a51d254f0c27f15abb016030eeb9e38b5ee06ee13d28d88ac5f5cc13a2520b42088090a1d1d19d321098996dc980b3f94cfc84ba0399a73ba7cd9ddc9b2a453d

更新

错误日志

TypeError: Argument must be a string
    at Op.writeStringBuffer [as fn] (/var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/protobufjs/src/writer_buffer.js:61:13)
    at BufferWriter.finish (/var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/protobufjs/src/writer.js:449:14)
    at Object.createBatchHeader (/var/accubits-workspace/hypeerledger-sawtooth/tuts/helpers/private-key.js:82:8)
    at app.get (/var/accubits-workspace/hypeerledger-sawtooth/tuts/index.js:24:32)
    at Layer.handle [as handle_request] (/var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/express/lib/router/layer.js:95:5)
    at next (/var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/express/lib/router/route.js:137:13)
    at Route.dispatch (/var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/express/lib/router/route.js:112:3)
    at Layer.handle [as handle_request] (/var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/express/lib/router/layer.js:95:5)
    at /var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/express/lib/router/index.js:281:22
    at Function.process_params (/var/accubits-workspace/hypeerledger-sawtooth/tuts/node_modules/express/lib/router/index.js:335:12)

标签： javascriptnode.jshyperledgerhyperledger-sawtooth

解决方案

错误不在Buffer.from但在protobuf.Transaction.create

headerSignature需要是 a string，而你正在通过 aBuffer

根据文档，它应该是这样的：

const signature = signer.sign(transactionHeaderBytes)

const transaction = protobuf.Transaction.create({
    header: transactionHeaderBytes,
    headerSignature: signature,
    payload: payloadBytes
})

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