71 lines
1.6 KiB
TypeScript
71 lines
1.6 KiB
TypeScript
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import assert from 'assert';
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import { MessageTypes, signTypedData, SignTypedDataVersion } from '@metamask/eth-sig-util';
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import { Secp256k1 } from "@cosmjs/crypto";
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interface TypedMessageDomain {
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name?: string;
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version?: string;
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chainId?: number;
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verifyingContract?: string;
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salt?: ArrayBuffer;
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}
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/**
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* Registry account.
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*/
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// TODO(egor): This is a wrapper around the private key and doesn't have any account related stuff (e.g. account number/sequence). Maybe rename to Key?
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export class Account {
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_privateKey: Buffer
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_publicKey?: Uint8Array
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/**
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* New Account.
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* @param {buffer} privateKey
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*/
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constructor(privateKey: Buffer) {
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assert(privateKey);
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this._privateKey = privateKey;
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}
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get privateKey() {
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return this._privateKey;
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}
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async init () {
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// Generate public key.
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const keypair = await Secp256k1.makeKeypair(this._privateKey);
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const compressed = Secp256k1.compressPubkey(keypair.pubkey);
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this._publicKey = compressed
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}
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/**
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* Get private key.
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*/
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getPrivateKey() {
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return this._privateKey.toString('hex');
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}
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/**
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* Sign message.
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*/
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sign(message: any) {
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assert(message);
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const eipMessageDomain: any = message.eipToSign.domain;
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const signature = signTypedData({
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data: {
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types: message.eipToSign.types as MessageTypes,
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primaryType: message.eipToSign.primaryType,
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domain: eipMessageDomain as TypedMessageDomain,
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message: message.eipToSign.message as Record<string, unknown>
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},
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privateKey: this._privateKey,
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version: SignTypedDataVersion.V4
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})
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return signature;
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}
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}
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