本页目录

快速开始

启用扩展、选择账户，并将 API 客户端连接到目标链。根据链的当前元数据构建交易 payload；本指南中省略的十六进制数据均为占位值。

了解如何检测、连接和与 Polkadot 及 Substrate 链进行交互。

OneKey 通过 Polkadot.js 扩展接口提供本文列出的操作。

Provider 检测


// OneKey registers as a Polkadot.js extension
const provider = window.$onekey?.polkadot
 
// Or use the standard web3Enable API
import { web3Enable, web3Accounts } from '@polkadot/extension-dapp'

启用扩展


// Using OneKey provider directly
const enabled = await provider.web3Enable('My dApp')
 
if (enabled) {
  const accounts = await provider.web3Accounts()
  console.log('Accounts:', accounts)
}

使用 Polkadot.js Extension API（推荐）


import { web3Enable, web3Accounts } from '@polkadot/extension-dapp'
 
// Enable all extensions (including OneKey)
const extensions = await web3Enable('My dApp')
 
if (extensions.length === 0) {
  throw new Error('No extension found')
}
 
// Get all accounts
const allAccounts = await web3Accounts()
console.log('Accounts:', allAccounts)

获取账户


const accounts = await provider.web3Accounts()
 
accounts.forEach(account => {
  console.log({
    address: account.address,     // Substrate address
    name: account.name,           // Account name
    type: account.type,           // 'sr25519' | 'ed25519' | 'ecdsa'
    genesisHash: account.genesisHash, // Optional chain genesis
  })
})

订阅账户变更


const unsubscribe = provider.web3AccountsSubscribe((accounts) => {
  console.log('Accounts changed:', accounts)
})
 
// Later: unsubscribe()

与 Polkadot.js API 配合使用

安装


npm install @polkadot/api @polkadot/extension-dapp

连接并签署交易


import { ApiPromise, WsProvider } from '@polkadot/api'
import { web3Enable, web3FromAddress, web3Accounts } from '@polkadot/extension-dapp'
 
// Enable extensions
await web3Enable('My dApp')
 
// Get accounts
const accounts = await web3Accounts()
const account = accounts[0]
if (!account) throw new Error("No account was selected")
 
// Connect to chain
const wsProvider = new WsProvider('wss://rpc.polkadot.io')
const api = await ApiPromise.create({ provider: wsProvider })
 
// Get injector
const injector = await web3FromAddress(account.address)
 
// Create and sign transaction
const tx = api.tx.balances.transferKeepAlive(
  recipientAddress,
  '10000000000' // 1 DOT = 10^10 planck on Polkadot
)
 
// Sign and send
const hash = await tx.signAndSend(
  account.address,
  { signer: injector.signer }
)
 
console.log('Transaction hash:', hash.toHex())