# 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)