https://github.com/zy445566/ecdsa-secp256k1

ecdsa secp256k1 by native js
https://github.com/zy445566/ecdsa-secp256k1

bitcoin btc ecdsa

Last synced: 5 days ago
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ecdsa secp256k1 by native js

• Host: GitHub
• URL: https://github.com/zy445566/ecdsa-secp256k1
• Owner: zy445566
• License: mit
• Created: 2019-05-30T08:19:00.000Z (over 5 years ago)
• Default Branch: master
• Last Pushed: 2020-06-08T10:02:58.000Z (over 4 years ago)
• Last Synced: 2024-08-11T08:51:36.704Z (3 months ago)
• Topics: bitcoin, btc, ecdsa
• Language: JavaScript
• Size: 13.7 KB
• Stars: 6
• Watchers: 2
• Forks: 0
• Open Issues: 1
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# ecdsa-secp256k1

[![Build Status](https://travis-ci.org/zy445566/ecdsa-secp256k1.svg?branch=master)](https://travis-ci.org/zy445566/ecdsa-secp256k1) 

[![codecov](https://codecov.io/gh/zy445566/ecdsa-secp256k1/branch/master/graph/badge.svg)](https://codecov.io/gh/zy445566/ecdsa-secp256k1)

only one no dependencied ecdsa secp256k1 by native js.

attention：`node version request >= 12.0`

# use

## get private key by rand

```js

let ecdsa = require('ecdsa-secp256k1');

ecdsa.randPrivateKeyNum().toString(16);//maybe output:b1904389afc66e8c5ec5165c4eb82d44237cc1409430302b31414a6b90123120

``` 

## get public key by private key Num

```js

let privateKeyNum = 0xeddbdc1168f1daeadbd3e44c1e3f8f5a284c2029f78ad26af98583a499de5b19n;

let publicKeyPoint = ecdsa.getPublicKeyPoint(privateKeyNum);

ecdsa.publicKeyPoint2HexStr(publicKeyPoint);//output: 4ea279824636aa9172473b6c3076727f17dada14847305487405a38a09c91ce6d63478f426ddcf618be66568cb6bd5bd7201c71689705d9602ae0a7c131a3bafb

```

## sign && verify

```js

let privateKeyNum = 0xeddbdc1168f1daeadbd3e44c1e3f8f5a284c2029f78ad26af98583a499de5b19n;

let publicKeyPoint = {

    x: 0xea279824636aa9172473b6c3076727f17dada14847305487405a38a09c91ce6dn,

    y: 0x63478f426ddcf618be66568cb6bd5bd7201c71689705d9602ae0a7c131a3bafbn

}

let msgData = 'Test Data';

let sha1 = crypto.createHash('sha256').update(msgData).digest('hex');

let msgDataNum = BigInt(`0x${sha1}`);

let signData = ecdsa.sign(privateKeyNum,msgDataNum);

ecdsa.verify(publicKeyPoint,signData,msgDataNum);//output:true

```