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

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

• Sign and validate data with solidity

  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

  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

  npm install eth-crypto --save

// es6
import EthCrypto from 'eth-crypto';

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

API

• createIdentity()
• publicKeyByPrivateKey()
• publicKey.toAddress()
• publicKey.compress()
• publicKey.decompress()
• sign()
• recover()
• recoverPublicKey()
• encryptWithPublicKey()
• decryptWithPrivateKey()
• cipher.stringify()
• cipher.parse()
• signTransaction()
• txDataByCompiled()
• calculateContractAddress()
• hex.compress() hex.decompress()

READ THE FULL DOCUMENTATION ON GITHUB