> ## Documentation Index
> Fetch the complete documentation index at: https://injectivelabs-docs-ai-sdk.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Peggy

`peggy` 模块是 injective ↔ ethereum 跨链桥的核心，存入的资金将被锁定在以太坊 [peggy 合约](https://etherscan.io/address/0xF955C57f9EA9Dc8781965FEaE0b6A2acE2BAD6f3#code) 上并在 Injective 链上铸造。同样，提取的资金将在 injective 链上销毁并在以太坊 peggy 合约上解锁。

## 消息

### MsgSendToEth

此消息用于通过 [peggy 合约](https://etherscan.io/address/0xF955C57f9EA9Dc8781965FEaE0b6A2acE2BAD6f3#code) 从 Injective Chain 提取资金，在此过程中，资金将在 injective 链上销毁并从 peggy 合约分发到以太坊地址。

请注意，此交易将收取 10 美元的跨链桥费用，以支付以太坊 gas 费用，这是在标准 INJ 交易费用之外的费用。

```ts theme={null}
import { ChainId } from '@injectivelabs/ts-types'
import { toBigNumber, toChainFormat } from '@injectivelabs/utils'
import { MsgSendToEth } from '@injectivelabs/sdk-ts/core/modules'
import { MsgBroadcasterWithPk } from '@injectivelabs/sdk-ts/core/tx'
import { getNetworkEndpoints, Network } from '@injectivelabs/networks'
import { TokenPrice, TokenStaticFactory } from '@injectivelabs/sdk-ts/service'
// 参考 https://github.com/InjectiveLabs/injective-lists
import { tokens } from '../data/tokens.json'

export const tokenStaticFactory = new TokenStaticFactory(tokens as TokenStatic[])

const tokenPriceMap = new TokenPrice(Network.Mainnet)
const tokenService = new TokenService({
  chainId: ChainId.Mainnet,
  network: Network.Mainnet,
})

const ETH_BRIDGE_FEE_IN_USD = 10
const endpointsForNetwork = getNetworkEndpoints(Network.Mainnet)

const tokenSymbol = 'INJ'
const tokenMeta = tokenStaticFactory.toToken(tokenSymbol)

const amount = 1
const injectiveAddress = 'inj1...'
const destinationAddress = '0x...' // 以太坊地址
const tokenDenom = `peggy${tokenMeta.erc20.address}`

if (!tokenMeta) {
  return
}

const tokenUsdPrice = tokenPriceMap[tokenMeta.coinGeckoId]
const amountToFixed = toChainFormat(amount, tokenMeta.decimals).toFixed()
const bridgeFeeInToken = toBigNumber(ETH_BRIDGE_FEE_IN_USD).dividedBy(tokenUsdPrice).toFixed()

const msg = MsgSendToEth.fromJSON({
  injectiveAddress,
  address: destinationAddress,
  amount: {
    denom: tokenDenom,
    amount: amountToFixed,
  },
  bridgeFee: {
    denom: tokenDenom,
    amount: bridgeFeeInToken,
  },
})

const txHash = await new MsgBroadcasterWithPk({
  privateKey,
  network: Network.Mainnet,
}).broadcast({
  msgs: msg,
})
```