metamask-extension/app/scripts/account-import-strategies/index.js

這部分就是用戶如果往metamask中import一個已有的賬戶調用的接口，就是是直接輸入私鑰privateKey還是使用json file

即如下圖：

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const Wallet = require('ethereumjs-wallet') const importers = require('ethereumjs-wallet/thirdparty') const ethUtil = require('ethereumjs-util')const accountImporter = {importAccount (strategy, args) {try {const importer = this.strategies[strategy]//確認使用的是那種import的方法const privateKeyHex = importer.apply(null, args) //args就是輸入的值，如privateKey或者input, passwordreturn Promise.resolve(privateKeyHex)} catch (e) {return Promise.reject(e)}},strategies: {'Private Key': (privateKey) => {//輸入私鑰if (!privateKey) {throw new Error('Cannot import an empty key.')}const prefixed = ethUtil.addHexPrefix(privateKey)//加入0x前綴const buffer = ethUtil.toBuffer(prefixed)if (!ethUtil.isValidPrivate(buffer)) {throw new Error('Cannot import invalid private key.')}const stripped = ethUtil.stripHexPrefix(prefixed)//去掉前綴return stripped//輸出私鑰},'JSON File': (input, password) => {let wallettry {wallet = importers.fromEtherWallet(input, password)} catch (e) {console.log('Attempt to import as EtherWallet format failed, trying V3...')}if (!wallet) {wallet = Wallet.fromV3(input, password, true)}return walletToPrivateKey(wallet)},},}function walletToPrivateKey (wallet) {const privateKeyBuffer = wallet.getPrivateKey()return ethUtil.bufferToHex(privateKeyBuffer) }module.exports = accountImporter

ethereumjs-wallet

• fromV1(input, password)?- import a wallet (Version 1 of the Ethereum wallet format)
• fromV3(input, password, [nonStrict])?- import a wallet (Version 3 of the Ethereum wallet format). Set?nonStrict?true to accept files with mixed-caps.

var thirdparty = require('ethereumjs-wallet/thirdparty')

• fromEtherWallet(input, password)?- import a wallet generated by EtherWallet

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轉載于:https://www.cnblogs.com/wanghui-garcia/p/9791559.html

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