钱包账号

neo钱包主要包括address,privateKey,publicKey,scriptHash,WIF这几个部分；它们之间存在一定的转化关系：

NEP<=>WIF <=> Private => Public => ScriptHash <=> Address

不开玩笑，除了 address 可以告诉别人以外，其它的对谁都不要说，address类似一个银行卡号，是别人想给你转账的时候使用的

创建钱包账号

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import { wallet } from ‘@cityofzion/neon-js’;

/**
* 根据passpase生产一个新的neo账号
* @param {*} passphase
* @param {*} confirmPassphase
* @param {*} wif
*/
export function createWalletAccount(passphase: string, confirmPassphase: string, wif?: string): ?WalletAccount {

if (passphase !== confirmPassphase) return null;

var account = new wallet.Account(wif || wallet.generatePrivateKey());
const encryptedWIF = wallet.encrypt(account.WIF, passphase);

const result: WalletAccount = {
address: account.address,
privateKey: account.privateKey,
publicKey: account.publicKey,
scriptHash: account.scriptHash,
WIF: account.WIF,
encryptedWIF,
passphase,
}

return result;
}

创建钱包账号单元测试

通过jest对创建钱包的方法进行单元测试

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test(‘createWalletAccount ‘, () => {
const passphase = ‘123456’;
const account = createWalletAccount(passphase, passphase);
console.log(account);
expect(account.address !== null).toBe(true);
});

运行结果如下所示，就是当前生成的账号信息，可以使用neo-wallet登录一下试试。

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{
address: ‘AUMgtJsw3kBrcA7poBYNaonZTGMNoqZNLy’,
privateKey: ’10bb026b4015c481f0b5142aa5de36de40a99fc8c26e956011a3f820f7708fba’,
publicKey: ’03af2ad8725c4926632d6816f5502d8f749dec369afadfe0bb5ac697fe22a0ef77′,
scriptHash: ‘a8f677c132f2c82d73ff138e817e784c25ab068a’,
WIF: ‘KwnETPM2m8wTAY3qySvDVLf3Vpfg77nvJhxR2Qyi8uMWKoqP1Q3f’,
encryptedWIF: ‘6PYVHykkA1TfyQ2344wftv5e7vRoecV4iVwEVZ62aqCAx3dh3LDrRV19AS’,
passphase: ‘123456’
}

转化

正如前面所述的，钱包里的各个数据存在一定的转化关系，至于详细的相互之间转化的原理，先不至讨论，我们可以使用neon-js的相关API来查看是否正确转化。

NEP<=>WIF <=> Private => Public => ScriptHash <=> Address

下面先新建一个jtest的单元测试文件Core.spec.js

私钥到公钥的转化

这里使用上面生成的测试账号进行测试，注意因为是测试账号以后我不会再使用，所以暴露出来，如果是你的个人账号，请一定不要暴露WIF以及privateKey。

单元测试代码如下：

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import {wallet} from ‘@cityofzion/neon-js’;

test(‘private:10bb026b4015c481f0b5142aa5de36de40a99fc8c26e956011a3f820f7708fba get PUb_Key’,()=>{
const pubKey = wallet.getPublicKeyFromPrivateKey(’10bb026b4015c481f0b5142aa5de36de40a99fc8c26e956011a3f820f7708fba’);
expect(pubKey).toBe(’03af2ad8725c4926632d6816f5502d8f749dec369afadfe0bb5ac697fe22a0ef77′);
});

使用命令运行单元测试：

1	npm run test __test__/neo/Core.spec.js

运行结果：

所有转化

完整的转化关系如下：

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import {wallet} from ‘@cityofzion/neon-js’;

const walletAccount = {
address: ‘AUMgtJsw3kBrcA7poBYNaonZTGMNoqZNLy’,
privateKey: ’10bb026b4015c481f0b5142aa5de36de40a99fc8c26e956011a3f820f7708fba’,
publicKey: ’03af2ad8725c4926632d6816f5502d8f749dec369afadfe0bb5ac697fe22a0ef77′,
scriptHash: ‘a8f677c132f2c82d73ff138e817e784c25ab068a’,
WIF: ‘KwnETPM2m8wTAY3qySvDVLf3Vpfg77nvJhxR2Qyi8uMWKoqP1Q3f’,
encryptedWIF: ‘6PYVHykkA1TfyQ2344wftv5e7vRoecV4iVwEVZ62aqCAx3dh3LDrRV19AS’,
passphase: ‘123456’
};

// WIF <=> privateKey
test(‘WIF <=> privateKey’,()=>{
const wif = wallet.getWIFFromPrivateKey(walletAccount.privateKey);
expect(wif).toBe(walletAccount.WIF);
const privateKey = wallet.getPrivateKeyFromWIF(walletAccount.WIF);
expect(privateKey).toBe(walletAccount.privateKey);
});

// privateKey => publicKey
test(`privateKey => publicKey:${walletAccount.privateKey}`,()=>{
const pubKey = wallet.getPublicKeyFromPrivateKey(walletAccount.privateKey);
expect(pubKey).toBe(walletAccount.publicKey);
});

// publicKey => ScriptHash
test(`publicKey => ScriptHash:${walletAccount.publicKey}`,()=>{
const scriptHash = wallet.getScriptHashFromPublicKey(walletAccount.publicKey);
expect(scriptHash).toBe(walletAccount.scriptHash);
});

// scriptHash <=> address
test(‘scriptHash <=> address’,()=>{
const address = wallet.getAddressFromScriptHash(walletAccount.scriptHash);
expect(address).toBe(walletAccount.address);
const scriptHash = wallet.getScriptHashFromAddress(walletAccount.address);
expect(scriptHash).toBe(walletAccount.scriptHash);
});

总结

如上，主要说明了neo账号的创建，以及讲述账号各个字段之间的转化关系，本篇使用的api为neon-js，这是coz在github社区开源的neo钱包api，它包含了钱包开发的所有的api，我认为它是学习钱包的很好的材料，当然neo-gui，neo-cli本身也是开源的，完全可以使用它们的源码来学习，只是相较于C#，对于开发跨平台应用，我更喜欢基于electron的方案。

为了学习开发neo钱包，我搭建了一个electron的boilerplate，作为快速启动的基础，这样其他同样想用此方案的朋友就不用再一次去搭建环境了。此boilerplate具体集成了以下技术方案：electron，React，dva，flow，antd；后面会抽时间把文中提到的jest也集成进去以便可以开箱即用的写单元测试。

boilerplate传送门

文中代码传送门

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