🛠 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 app = async () => {
  const web3 = await CardanoWeb3.init()

  const mnemonic = web3.utils.keys.mnemonicGenerate()
  const account = web3.account.fromMnemonic(mnemonic)
  await account.updateState() // update balance & delegation info
  const { utxos } = account.__state

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

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

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

  console.log(tx_hash)
}

app()

Web3 Configuration Parameteres

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

const app = async () => {
  const providerHeaders = {
    "x-api-key": "YOUR_API_KEY_01",
  }

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

  const web3 = await CardanoWeb3.init({
    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
}

app()

Test

Check /test folder for available tests

yarn test