🛠 Cardano Web3 JavaScript SDK

CardanoWeb3js is a versatile TypeScript library designed for seamless integration with the Cardano blockchain. It supports both Node.js and browser environments, streamlining transaction creation, smart contract deployment, and data exploration. Ideal for developers, this toolkit simplifies Cardano cryptographic operations and API interactions

Installation

To install with Yarn, run:

yarn install cardano-web3-js

To install with NPM, run:

npm i cardano-web3-js

Documentation

Docs: https://cardano-web3-js.org
Typedoc API: https://cardano-web3-js.org/api
Playground: https://cardano-web3-js.org/playground

Basic Usage

Check /test folder for detailed usage examples. Or read the documentation to learn how to create a transaction of any complexity

import { CardanoWeb3 } from "cardano-web3-js"

const web3 = new CardanoWeb3()

const mnemonic = web3.utils.keys.mnemonicGenerate()
const account = web3.account.fromMnemonic(mnemonic)
const state = await account.getState() // update balance & delegation info

console.log(mnemonic) // generated mnemonic
console.log(account.__config) // account info (xpub, changeAddress, creds, etc)
console.log(state) // balance & delegation info

const tx = await web3
  .createTx()
  .addInputs(state.utxos)
  .addOutput(
    {
      address: "addr1qxpm2aqmn48he8dtp9p8hk9gtew6cypy6ra3mgs8xkn86qmd3vtjzheq22w8mmfhm8agpmywnlu2rsxgkdrctv7mcc3s9anhjz",
      value: 2000000n,
    },
  )
  .applyAndBuild()

const tx_hash = await tx_unsigned
  .signWithAccount(account)
  .applyAndSubmit() // submit tx

console.log(tx_hash)

Web3 Configuration Parameteres

Configuration Parameters

import { CardanoWeb3, KoiosProvider, KupmiosProvider, BlockfrostProvider } from "cardano-web3-js"

const providerHeaders = {
  "x-api-key": "YOUR_API_KEY_01",
}

const koiosHeaders = {
  "x-api-key": "YOUR_API_KEY_02",
}

const web3 = new CardanoWeb3({
  network: "preprod", // "mainnet" | "preprod" | "preview" | "custom"
  protocolParams: {...}, // override protocolParams, eg. in case of custom network
  ttl: 900, // 900 secs = 15 minutes
  provider: new KoiosProvider("https://api.koios.rest/api/v1", providerHeaders),
  explorer: {
    koios: {
      headers: koiosHeaders,
      url: "https://preprod.koios.rest/api/v1",
    },
    nftcdn: {
      headers: {},
      url: "https://graph.xray.app/output/nftcdn/preprod/api/v1",
    },
    pricing: {
      headers: {},
      url: "https://graph.xray.app/output/pricing/mainnet/api/v1", // only mainnet available
    },
  }
})

console.log(web3.__config) // web3 instance config

Test

Check /test folder for available tests

yarn test