https://github.com/pubkey/eth-crypto

Cryptographic javascript-functions for ethereum and tutorials to use them with web3js and solidity
https://github.com/pubkey/eth-crypto

blockchain cipher dapp encryption eth ethereum ethereum-identity privatekey publickey sign sign-data signature signtransaction smart-contracts solidity transaction truffle tutorial web3 web3js

Last synced: 5 days ago
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Cryptographic javascript-functions for ethereum and tutorials to use them with web3js and solidity

• Host: GitHub
• URL: https://github.com/pubkey/eth-crypto
• Owner: pubkey
• License: mit
• Created: 2018-01-21T20:02:28.000Z (almost 7 years ago)
• Default Branch: master
• Last Pushed: 2024-10-25T18:35:38.000Z (3 months ago)
• Last Synced: 2024-10-29T15:12:00.271Z (3 months ago)
• Topics: blockchain, cipher, dapp, encryption, eth, ethereum, ethereum-identity, privatekey, publickey, sign, sign-data, signature, signtransaction, smart-contracts, solidity, transaction, truffle, tutorial, web3, web3js
• Language: JavaScript
• Homepage:
• Size: 592 KB
• Stars: 877
• Watchers: 19
• Forks: 158
• Open Issues: 5
• Metadata Files:
  • Readme: README
  • Funding: .github/FUNDING.yml
  • License: LICENSE

Awesome Lists containing this project

• Library-of-Ethereum - ETH Crypto - Cryptographic javascript-functions for ethereum and tutorials on how to use them together with web3js and solidity (Cryptography / Cairo)

README

        




    

        

    

        



# eth-crypto

Cryptographic javascript-functions for ethereum and tutorials on how to use them together with web3js and solidity.

## Tutorials

- **[Creating Keys and use them for ethereum-transactions](./tutorials/creating-transactions.md)**

  In this tutorial we will create an ethereum-identity and use it so send transactions to the blockchain.

- **[Sign and validate data with solidity](./tutorials/signed-data.md)**

  In this tutorial we will sign data in javascript and validate the signature inside of a smart-contract.

- **[Sending encrypted and signed data to other identites](./tutorials/encrypted-message.md)**  

  In this tutorial we will use the ethereum-identites and asymmetric cryptography to send an encrypted and signed message from Alice to Bob.

## Functions

### Install

```bash

  npm install eth-crypto --save

```

```javascript

// es6

import EthCrypto from 'eth-crypto';

// node

const EthCrypto = require('eth-crypto');

```

## API

- [createIdentity()](https://github.com/pubkey/eth-crypto#createidentity)

- [publicKeyByPrivateKey()](https://github.com/pubkey/eth-crypto#publickeybyprivatekey)

- [publicKey.toAddress()](https://github.com/pubkey/eth-crypto#publickeytoaddress)

- [publicKey.compress()](https://github.com/pubkey/eth-crypto#publickeycompress)

- [publicKey.decompress()](https://github.com/pubkey/eth-crypto#publickeydecompress)

- [sign()](https://github.com/pubkey/eth-crypto#sign)

- [recover()](https://github.com/pubkey/eth-crypto#recover)

- [recoverPublicKey()](https://github.com/pubkey/eth-crypto#recoverpublickey)

- [encryptWithPublicKey()](https://github.com/pubkey/eth-crypto#encryptwithpublickey)

- [decryptWithPrivateKey()](https://github.com/pubkey/eth-crypto#decryptwithprivatekey)

- [cipher.stringify()](https://github.com/pubkey/eth-crypto#cipherstringify)

- [cipher.parse()](https://github.com/pubkey/eth-crypto#cipherparse)

- [signTransaction()](https://github.com/pubkey/eth-crypto#signtransaction)

- [txDataByCompiled()](https://github.com/pubkey/eth-crypto#txdatabycompiled)

- [calculateContractAddress()](https://github.com/pubkey/eth-crypto#calculatecontractaddress)

- [hex.compress() hex.decompress()](https://github.com/pubkey/eth-crypto#hex-compressdecompress)

# [READ THE FULL DOCUMENTATION ON GITHUB](https://github.com/pubkey/eth-crypto)