web3.js adds eth.getRawTransactionByHash(txhash) method steps-JS Tutorial-php.cn

web3.js adds eth.getRawTransactionByHash(txhash) method steps

亚连

Release： 2018-05-30 10:20:10

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This article mainly introduces the steps of adding eth.getRawTransactionByHash (txhash) method to web3.js. Friends in need can refer to

eth_getRawTransactionByHash

https://ethereum. stackexchange.com/questions/7473/get-raw-transaction-from-hash

There is an "undocumented" method eth_getRawTransactionByHash from JSON-RPC

curl -H "Content-Type: application/json" -X POST --data \
&#39;{"jsonrpc":"2.0","method":"eth_getRawTransactionByHash","params":["<TX_HASH>"],"id":1}&#39; http://localhost:8545
<TX_HASH> - transaction id

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1. Find the types.d.ts file under web3 under the project node_modules

Eth

Add a method to the class

 getRawTransaction(hash: string, cb?: Callback<TransactionRaw>): Promise<TransactionRaw>

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Add TransactionRaw definition

export declare interface TransactionRaw {
 raw: string
}

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2. Find index.js

methods={}

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# under the project node_modules in web3-eth

##Add method

new Method({
   name: &#39;getRawTransaction&#39;,
   call: &#39;eth_getRawTransactionByHash&#39;,
   params: 1,
   inputFormatter: [null],
   outputFormatter: formatter.outputTransactionRawFormatter
  }),

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3. Find formatters.js in web3-core-helpers under the project node_modules

Add outputTransactionRawFormatter and add the corresponding one in module.exports

/**
 * Formats the output of a transaction raw value
 *
 * @method outputTransactionRawFormatter
 * @param {Object} tx
 * @returns {Object}
*/
var outputTransactionRawFormatter = function (tx){
 return tx;
};
module.exports = {
 inputDefaultBlockNumberFormatter: inputDefaultBlockNumberFormatter,
 inputBlockNumberFormatter: inputBlockNumberFormatter,
 inputCallFormatter: inputCallFormatter,
 inputTransactionFormatter: inputTransactionFormatter,
 inputAddressFormatter: inputAddressFormatter,
 inputPostFormatter: inputPostFormatter,
 inputLogFormatter: inputLogFormatter,
 inputSignFormatter: inputSignFormatter,
 outputBigNumberFormatter: outputBigNumberFormatter,
 outputTransactionFormatter: outputTransactionFormatter,
 outputTransactionRawFormatter: outputTransactionRawFormatter,
 outputTransactionReceiptFormatter: outputTransactionReceiptFormatter,
 outputBlockFormatter: outputBlockFormatter,
 outputLogFormatter: outputLogFormatter,
 outputPostFormatter: outputPostFormatter,
 outputSyncingFormatter: outputSyncingFormatter
};

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future. .

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