Cardano

// OneKey provides both onekey and nami interfaces
const onekey = window.cardano?.onekey
const nami = window.cardano?.nami
 
// Check availability
if (!onekey) {
  throw new Error('OneKey Cardano provider not detected')
}
 
// Get wallet info
console.log('Name:', onekey.name) // 'OneKey'
console.log('API Version:', onekey.apiVersion) // '0.1.0'
console.log('Icon:', onekey.icon)

// Request wallet access
const api = await window.cardano.onekey.enable()
 
// Now you can use the full API
const networkId = await api.getNetworkId()
console.log('Network:', networkId === 1 ? 'Mainnet' : 'Testnet')

const isEnabled = await window.cardano.onekey.isEnabled()
 
if (isEnabled) {
  const api = await window.cardano.onekey.enable()
  // Use API...
}

const api = await window.cardano.onekey.enable()
const networkId = await api.getNetworkId()
 
// 0 = Testnet, 1 = Mainnet
console.log('Network:', networkId)

const balance = await api.getBalance()
// Returns CBOR-encoded value (hex string)
console.log('Balance (CBOR):', balance)
 
// Decode using cardano-serialization-lib
import { Value } from '@emurgo/cardano-serialization-lib-browser'
const value = Value.from_bytes(Buffer.from(balance, 'hex'))
const lovelace = value.coin().to_str()
console.log('Balance:', parseInt(lovelace) / 1000000, 'ADA')

// Get used addresses (addresses with transaction history)
const usedAddresses = await api.getUsedAddresses()
console.log('Used addresses:', usedAddresses)
 
// Get unused addresses (fresh addresses)
const unusedAddresses = await api.getUnusedAddresses()
console.log('Unused addresses:', unusedAddresses)
 
// Get change address
const changeAddress = await api.getChangeAddress()
console.log('Change address:', changeAddress)
 
// Get reward/staking addresses
const rewardAddresses = await api.getRewardAddresses()
console.log('Reward addresses:', rewardAddresses)

// Get all UTxOs
const utxos = await api.getUtxos()
console.log('UTxOs:', utxos)
 
// Get UTxOs with minimum amount
const utxosWithAmount = await api.getUtxos(
  '1000000' // Minimum 1 ADA in lovelace (CBOR encoded)
)
 
// With pagination
const paginatedUtxos = await api.getUtxos(undefined, {
  page: 0,
  limit: 10,
})

// transaction should be CBOR-encoded hex string
const signedTx = await api.signTx(transactionCbor, partialSign)
 
// partialSign: boolean
// - false: sign all inputs owned by wallet
// - true: sign only inputs explicitly owned (for multi-sig)
 
console.log('Signed TX:', signedTx)

// Submit signed transaction
const txHash = await api.submitTx(signedTransactionCbor)
console.log('Transaction hash:', txHash)

import {
  TransactionBuilder,
  TransactionBuilderConfigBuilder,
  LinearFee,
  BigNum,
  Address,
  TransactionOutput,
  Value,
} from '@emurgo/cardano-serialization-lib-browser'
 
async function sendAda(recipientAddress, amountLovelace) {
  const api = await window.cardano.onekey.enable()
 
  // Get UTxOs
  const utxos = await api.getUtxos()
  const changeAddress = await api.getChangeAddress()
 
  // Build transaction
  const txBuilder = TransactionBuilder.new(
    TransactionBuilderConfigBuilder.new()
      .fee_algo(LinearFee.new(
        BigNum.from_str('44'),
        BigNum.from_str('155381')
      ))
      .pool_deposit(BigNum.from_str('500000000'))
      .key_deposit(BigNum.from_str('2000000'))
      .max_value_size(5000)
      .max_tx_size(16384)
      .coins_per_utxo_byte(BigNum.from_str('4310'))
      .build()
  )
 
  // Add inputs from UTxOs
  utxos.forEach(utxo => {
    // Add UTxO as input...
  })
 
  // Add output
  txBuilder.add_output(
    TransactionOutput.new(
      Address.from_bech32(recipientAddress),
      Value.new(BigNum.from_str(amountLovelace))
    )
  )
 
  // Set change address
  txBuilder.add_change_if_needed(Address.from_bech32(changeAddress))
 
  // Build transaction
  const tx = txBuilder.build_tx()
  const txCbor = Buffer.from(tx.to_bytes()).toString('hex')
 
  // Sign
  const signedTxCbor = await api.signTx(txCbor, false)
 
  // Submit
  const txHash = await api.submitTx(signedTxCbor)
  console.log('TX Hash:', txHash)
 
  return txHash
}

const api = await window.cardano.onekey.enable()
 
const addresses = await api.getUsedAddresses()
const address = addresses[0]
 
// Message to sign
const payload = Buffer.from('Hello Cardano!').toString('hex')
 
const signature = await api.signData(address, payload)
 
console.log({
  signature: signature.signature, // COSE_Sign1 signature
  key: signature.key,             // COSE_Key public key
})

import { COSESign1, COSEKey } from '@emurgo/cardano-message-signing-browser'
 
const coseSign1 = COSESign1.from_bytes(
  Buffer.from(signature.signature, 'hex')
)
const coseKey = COSEKey.from_bytes(
  Buffer.from(signature.key, 'hex')
)
 
// Get the signed payload
const signedPayload = coseSign1.payload()
 
// Verify signature
const publicKey = coseKey.header(0) // Get Ed25519 key
// Verification logic...

const api = await window.cardano.onekey.enable()
 
// Nami-compatible event API
api.experimental.on('accountChange', (addresses) => {
  console.log('Account changed:', addresses)
})

type Cbor = string // Hex-encoded CBOR
 
interface Paginate {
  page: number
  limit: number
}
 
interface Cip30DataSignature {
  signature: string // COSE_Sign1 hex
  key: string       // COSE_Key hex
}
 
type NetworkId = 0 | 1 // 0=testnet, 1=mainnet

try {
  const api = await window.cardano.onekey.enable()
} catch (error) {
  if (error.code === -1) {
    console.log('User rejected connection')
  } else if (error.code === -2) {
    console.log('Account not found')
  } else {
    console.error('Error:', error.message)
  }
}

npm install lucid-cardano

import { Lucid } from 'lucid-cardano'
 
// Initialize Lucid with OneKey
const lucid = await Lucid.new(
  new Blockfrost('https://cardano-mainnet.blockfrost.io/api', 'your-api-key'),
  'Mainnet'
)
 
// Connect OneKey
const api = await window.cardano.onekey.enable()
lucid.selectWallet(api)
 
// Send ADA
const tx = await lucid
  .newTx()
  .payToAddress('addr1...', { lovelace: 5000000n })
  .complete()
 
const signedTx = await tx.sign().complete()
const txHash = await signedTx.submit()
 
console.log('TX Hash:', txHash)

npm install @meshsdk/core

import { BrowserWallet, Transaction } from '@meshsdk/core'
 
// Connect to OneKey
const wallet = await BrowserWallet.enable('onekey')
 
// Get wallet info
const balance = await wallet.getBalance()
const addresses = await wallet.getUsedAddresses()
 
// Build and send transaction
const tx = new Transaction({ initiator: wallet })
  .sendLovelace('addr1...', '5000000')
 
const unsignedTx = await tx.build()
const signedTx = await wallet.signTx(unsignedTx)
const txHash = await wallet.submitTx(signedTx)

// Access via Nami interface
const nami = window.cardano.nami
const api = await nami.enable()
 
// Same API as OneKey
const balance = await api.getBalance()