JS implementation of Cosmos cryptography and addresses logic.
Features:
- Generate private/public key from mnemonic and path.
- Sign/verify bytes/JSON with private/public key.s
- Convert Cosmos bech32 address to bytes32 (solidity capability).
Install dependency:
yarn add cosmos-lib
And use in code:
const cosmos = require('cosmos-lib');
Generate private/public key from mnemonic:
const MNEMONIC = 'cluster unveil differ bright define prosper hunt warrior fetch rough host fringe worry mention gospel enlist elder laugh segment funny avoid regular market fortune';
const keys = cosmos.crypto.getKeysFromMnemonic(MNEMONIC);
console.log(keys.publicKey, keys.privateKey);Sign bytes/JSON:
const bytes = crypto.randomBytes(12);
const json = {
data: crypto.randomBytes(128)
};
let signature = cosmos.crypto.sign(bytes, keys.privateKey);
let verify = cosmos.crypto.verify(bytes, signature, keys.publicKey);
if (!verify) {
throw 'Cant verify signature';
}
signature = cosmos.crypto.signJson(json, keys.privateKey);
verify = cosmos.crypto.verifyJson(json, signature, keys.publicKey);
if (!verify) {
throw 'Cant verify signature';
}Get address from public key:
const prefix = 'mywallet';
const address = cosmos.address.getAddress(keys.publicKey, prefix); // prefix by default is 'cosmos'.
console.log(address);Get bytes32 from address:
bytes32 = cosmos.address.getBytes32(address);
console.log(bytes32.toString('hex'));More examples could be found in tests.
To generate docs:
yarn global add jsdoc
yarn run docs
Then server them from out directory.
To run tests:
git clone git@github.com:WingsDao/cosmos-lib.git
cd cosmos-lib/
yarn install
yarn test
MIT.