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EVM example scripts
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‎examples/avm/README.md

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# AVM RPC
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# AVM
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Tests for the Avalanche [AVM RPC](https://docs.avax.network/build/avalanchego-apis/exchange-chain-x-chain-api)
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‎examples/evm/README.md

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# EVM
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Tests for the Avalanche [EVM RPC](https://docs.avax.network/build/avalanchego-apis/contract-chain-c-chain-api)
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* [exportTx-ant-xchain.ts](./exportTx-ant-xchain.ts)
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* [exportTx-avax-xchain.ts](./exportTx-avax-xchain.ts)
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* [importTx-ant-xchain.ts](./importTx-ant-xchain.ts)
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* [importTx-avax-xchain.ts](./importTx-avax-xchain.ts)

‎examples/evm/exportTx-ant-xchain.ts

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import {
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Avalanche,
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BinTools,
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BN,
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Buffer
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} from "../../src"
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import {
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AVMAPI,
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KeyChain as AVMKeyChain
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} from "../../src/apis/avm"
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import {
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EVMAPI,
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KeyChain,
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UnsignedTx,
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Tx,
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EVMInput,
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ExportTx,
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SECPTransferOutput,
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TransferableOutput
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} from "../../src/apis/evm"
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import { RequestResponseData } from "../../src/common"
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import { Defaults } from "../../src/utils"
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const ip: string = "localhost"
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const port: number = 9650
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const protocol: string = "http"
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const networkID: number = 12345
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const avalanche: Avalanche = new Avalanche(ip, port, protocol, networkID)
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const xchain: AVMAPI = avalanche.XChain()
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const cchain: EVMAPI = avalanche.CChain()
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const bintools: BinTools = BinTools.getInstance()
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const xKeychain: AVMKeyChain = xchain.keyChain()
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const privKey: string = "PrivateKey-ewoqjP7PxY4yr3iLTpLisriqt94hdyDFNgchSxGGztUrTXtNN"
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const cKeychain: KeyChain = cchain.keyChain()
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xKeychain.importKey(privKey)
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cKeychain.importKey(privKey)
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const xAddresses: Buffer[] = xchain.keyChain().getAddresses()
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const cAddresses: Buffer[] = cchain.keyChain().getAddresses()
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const xChainBlockchainIdStr: string = Defaults.network['12345'].X.blockchainID
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const xChainBlockchainIdBuf: Buffer = bintools.cb58Decode(xChainBlockchainIdStr)
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const cChainBlockchainIdStr: string = Defaults.network['12345'].C.blockchainID
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const cChainBlockchainIdBuf: Buffer = bintools.cb58Decode(cChainBlockchainIdStr)
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const cHexAddress: string = "0x8db97C7cEcE249c2b98bDC0226Cc4C2A57BF52FC"
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const evmInputs: EVMInput[] = []
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let exportedOuts: TransferableOutput[] = []
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const Web3 = require('web3');
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const path: string = '/ext/bc/C/rpc'
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const web3 = new Web3(`${protocol}://${ip}:${port}${path}`)
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const threshold: number = 1
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const main = async (): Promise<any> => {
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const avaxAssetIDBuf: Buffer = await xchain.getAVAXAssetID()
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const avaxAssetIDStr: string = bintools.cb58Encode(avaxAssetIDBuf)
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const antAssetIDStr: string = "verma4Pa9biWKbjDGNsTXU47cYCyDSNGSU1iBkxucfVSFVXdv"
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const antAssetIDBuf: Buffer = bintools.cb58Decode(antAssetIDStr)
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const antAssetBalanceResponse: RequestResponseData = await cchain.callMethod("eth_getAssetBalance", [
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cHexAddress,
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"latest",
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antAssetIDStr
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], "ext/bc/C/rpc")
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const antAssetBalance: number = parseInt(antAssetBalanceResponse.data.result, 16)
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let avaxBalance: BN = await web3.eth.getBalance(cHexAddress)
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avaxBalance = new BN(avaxBalance.toString().substring(0, 15))
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const fee: BN = cchain.getDefaultTxFee()
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const txcount = await web3.eth.getTransactionCount(cHexAddress)
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const nonce: number = txcount;
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const locktime: BN = new BN(0)
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let evmInput: EVMInput = new EVMInput(cHexAddress, avaxBalance, avaxAssetIDStr, nonce)
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evmInput.addSignatureIdx(0, cAddresses[0])
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evmInputs.push(evmInput)
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evmInput = new EVMInput(cHexAddress, antAssetBalance, antAssetIDStr, nonce)
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evmInput.addSignatureIdx(0, cAddresses[0])
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evmInputs.push(evmInput)
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let secpTransferOutput: SECPTransferOutput = new SECPTransferOutput(avaxBalance.sub(fee), xAddresses, locktime, threshold)
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let transferableOutput: TransferableOutput = new TransferableOutput(avaxAssetIDBuf, secpTransferOutput)
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exportedOuts.push(transferableOutput)
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secpTransferOutput = new SECPTransferOutput(new BN(antAssetBalance), xAddresses, locktime, threshold)
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transferableOutput = new TransferableOutput(antAssetIDBuf, secpTransferOutput)
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exportedOuts.push(transferableOutput)
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exportedOuts = exportedOuts.sort(TransferableOutput.comparator());
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const exportTx: ExportTx = new ExportTx(
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networkID,
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cChainBlockchainIdBuf,
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xChainBlockchainIdBuf,
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evmInputs,
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exportedOuts
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)
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const unsignedTx: UnsignedTx = new UnsignedTx(exportTx)
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const tx: Tx = unsignedTx.sign(cKeychain)
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const id: string = await cchain.issueTx(tx)
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console.log(id)
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}
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main()

‎examples/evm/exportTx-avax-xchain.ts

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import {
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Avalanche,
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BinTools,
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BN,
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Buffer
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} from "../../src"
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import {
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AVMAPI,
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KeyChain as AVMKeyChain
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} from "../../src/apis/avm"
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import {
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EVMAPI,
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KeyChain,
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UnsignedTx,
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Tx,
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EVMInput,
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ExportTx,
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SECPTransferOutput,
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TransferableOutput
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} from "../../src/apis/evm"
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import { Defaults } from "../../src/utils"
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const ip: string = "localhost"
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const port: number = 9650
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const protocol: string = "http"
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const networkID: number = 12345
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const avalanche: Avalanche = new Avalanche(ip, port, protocol, networkID)
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const xchain: AVMAPI = avalanche.XChain()
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const cchain: EVMAPI = avalanche.CChain()
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const bintools: BinTools = BinTools.getInstance()
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const xKeychain: AVMKeyChain = xchain.keyChain()
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const privKey: string = "PrivateKey-ewoqjP7PxY4yr3iLTpLisriqt94hdyDFNgchSxGGztUrTXtNN-"
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const cKeychain: KeyChain = cchain.keyChain()
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xKeychain.importKey(privKey)
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cKeychain.importKey(privKey)
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const xAddresses: Buffer[] = xchain.keyChain().getAddresses()
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const cAddresses: Buffer[] = cchain.keyChain().getAddresses()
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const xChainBlockchainIdStr: string = Defaults.network['12345'].X.blockchainID
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const xChainBlockchainIdBuf: Buffer = bintools.cb58Decode(xChainBlockchainIdStr)
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const cChainBlockchainIdStr: string = Defaults.network['12345'].C.blockchainID
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const cChainBlockchainIdBuf: Buffer = bintools.cb58Decode(cChainBlockchainIdStr)
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const cHexAddress: string = "0x8db97C7cEcE249c2b98bDC0226Cc4C2A57BF52FC"
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const evmInputs: EVMInput[] = []
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const exportedOuts: TransferableOutput[] = []
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const Web3 = require('web3');
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const path: string = '/ext/bc/C/rpc'
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const web3 = new Web3(`${protocol}://${ip}:${port}${path}`)
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const threshold: number = 1
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const main = async (): Promise<any> => {
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const avaxAssetIDBuf: Buffer = await xchain.getAVAXAssetID()
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const avaxAssetIDStr: string = bintools.cb58Encode(avaxAssetIDBuf)
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let balance: BN = await web3.eth.getBalance(cHexAddress)
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balance = new BN(balance.toString().substring(0, 15))
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const fee: BN = cchain.getDefaultTxFee()
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const txcount = await web3.eth.getTransactionCount(cHexAddress)
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const nonce: number = txcount;
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const locktime: BN = new BN(0)
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const evmInput: EVMInput = new EVMInput(cHexAddress, balance, avaxAssetIDStr, nonce)
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evmInput.addSignatureIdx(0, cAddresses[0])
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evmInputs.push(evmInput)
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const secpTransferOutput: SECPTransferOutput = new SECPTransferOutput(balance.sub(fee), xAddresses, locktime, threshold)
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const transferableOutput: TransferableOutput = new TransferableOutput(avaxAssetIDBuf, secpTransferOutput)
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exportedOuts.push(transferableOutput)
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const exportTx: ExportTx = new ExportTx(
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networkID,
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cChainBlockchainIdBuf,
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xChainBlockchainIdBuf,
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evmInputs,
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exportedOuts
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)
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const unsignedTx: UnsignedTx = new UnsignedTx(exportTx)
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const tx: Tx = unsignedTx.sign(cKeychain)
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const id: string = await cchain.issueTx(tx)
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console.log(id)
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}
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main()

‎examples/evm/importTx-ant-xchain.ts

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import {
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Avalanche,
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BinTools,
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BN,
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Buffer
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} from "../../src"
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import {
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EVMAPI,
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EVMOutput,
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ImportTx,
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TransferableInput,
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KeyChain,
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UTXO,
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UTXOSet,
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SECPTransferInput,
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AmountOutput,
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UnsignedTx,
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Tx
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} from "../../src/apis/evm"
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import { Defaults } from "../../src/utils"
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const ip: string = "localhost"
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const port: number = 9650
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const protocol: string = "http"
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const networkID: number = 12345
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const avalanche: Avalanche = new Avalanche(ip, port, protocol, networkID)
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const cchain: EVMAPI = avalanche.CChain()
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const bintools: BinTools = BinTools.getInstance()
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const cKeychain: KeyChain = cchain.keyChain()
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const cHexAddress: string = "0x8db97C7cEcE249c2b98bDC0226Cc4C2A57BF52FC"
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const privKey: string = "PrivateKey-ewoqjP7PxY4yr3iLTpLisriqt94hdyDFNgchSxGGztUrTXtNN"
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cKeychain.importKey(privKey)
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const cAddresses: Buffer[] = cchain.keyChain().getAddresses()
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const cAddressStrings: string[] = cchain.keyChain().getAddressStrings()
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const cChainBlockchainIdStr: string = Defaults.network['12345'].C.blockchainID
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const cChainBlockchainIdBuf: Buffer = bintools.cb58Decode(cChainBlockchainIdStr)
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const xChainBlockchainIdStr: string = Defaults.network['12345'].X.blockchainID
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const xChainBlockchainIdBuf: Buffer = bintools.cb58Decode(xChainBlockchainIdStr)
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const importedIns: TransferableInput[] = []
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const evmOutputs: EVMOutput[] = []
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const main = async (): Promise<any> => {
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const avaxAsetID: Buffer = await cchain.getAVAXAssetID()
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const u: any = await cchain.getUTXOs(cAddressStrings[0], "X")
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const utxoSet: UTXOSet = u.utxos
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const utxos: UTXO[] = utxoSet.getAllUTXOs()
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utxos.forEach((utxo: UTXO) => {
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const assetID: Buffer = utxo.getAssetID()
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const txid: Buffer = utxo.getTxID()
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const outputidx: Buffer = utxo.getOutputIdx()
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const output: AmountOutput = utxo.getOutput() as AmountOutput
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const amt: BN = output.getAmount().clone()
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const input: SECPTransferInput = new SECPTransferInput(amt)
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input.addSignatureIdx(0, cAddresses[0])
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const xferin: TransferableInput = new TransferableInput(txid, outputidx, assetID, input)
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importedIns.push(xferin)
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const evmOutput: EVMOutput = new EVMOutput(cHexAddress, amt, assetID)
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evmOutputs.push(evmOutput)
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})
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const importTx: ImportTx = new ImportTx(
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networkID,
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cChainBlockchainIdBuf,
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xChainBlockchainIdBuf,
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importedIns,
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evmOutputs
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)
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const unsignedTx: UnsignedTx = new UnsignedTx(importTx)
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const tx: Tx = unsignedTx.sign(cKeychain)
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const id: string = await cchain.issueTx(tx)
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console.log(id)
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}
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main()

‎examples/evm/importTx-avax-xchain.ts

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import {
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Avalanche,
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BinTools,
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BN,
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Buffer
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} from "../../src"
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import {
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EVMAPI,
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EVMOutput,
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ImportTx,
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TransferableInput,
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KeyChain,
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UTXO,
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UTXOSet,
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SECPTransferInput,
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AmountOutput,
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UnsignedTx,
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Tx
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} from "../../src/apis/evm"
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import { Defaults } from "../../src/utils"
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const ip: string = "localhost"
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const port: number = 9650
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const protocol: string = "http"
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const networkID: number = 12345
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const avalanche: Avalanche = new Avalanche(ip, port, protocol, networkID)
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const cchain: EVMAPI = avalanche.CChain()
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const bintools: BinTools = BinTools.getInstance()
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const cKeychain: KeyChain = cchain.keyChain()
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const cHexAddress: string = "0x8db97C7cEcE249c2b98bDC0226Cc4C2A57BF52FC"
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const privKey: string = "PrivateKey-ewoqjP7PxY4yr3iLTpLisriqt94hdyDFNgchSxGGztUrTXtNN"
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cKeychain.importKey(privKey)
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const cAddresses: Buffer[] = cchain.keyChain().getAddresses()
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const cAddressStrings: string[] = cchain.keyChain().getAddressStrings()
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const cChainBlockchainIdStr: string = Defaults.network['12345'].C.blockchainID
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const cChainBlockchainIdBuf: Buffer = bintools.cb58Decode(cChainBlockchainIdStr)
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const xChainBlockchainIdStr: string = Defaults.network['12345'].X.blockchainID
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const xChainBlockchainIdBuf: Buffer = bintools.cb58Decode(xChainBlockchainIdStr)
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const importedIns: TransferableInput[] = []
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const evmOutputs: EVMOutput[] = []
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const main = async (): Promise<any> => {
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const avaxAsetID: Buffer = await cchain.getAVAXAssetID()
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const u: any = await cchain.getUTXOs(cAddressStrings[0], "X")
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const utxoSet: UTXOSet = u.utxos
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const utxos: UTXO[] = utxoSet.getAllUTXOs()
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utxos.forEach((utxo: UTXO) => {
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const assetID: Buffer = utxo.getAssetID()
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const txid: Buffer = utxo.getTxID()
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const outputidx: Buffer = utxo.getOutputIdx()
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const output: AmountOutput = utxo.getOutput() as AmountOutput
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const amt: BN = output.getAmount().clone()
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if(avaxAsetID.toString("hex") === assetID.toString("hex")) {
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const input: SECPTransferInput = new SECPTransferInput(amt)
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input.addSignatureIdx(0, cAddresses[0])
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const xferin: TransferableInput = new TransferableInput(txid, outputidx, assetID, input)
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importedIns.push(xferin)
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const evmOutput: EVMOutput = new EVMOutput(cHexAddress, amt, assetID)
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evmOutputs.push(evmOutput)
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}
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})
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const importTx: ImportTx = new ImportTx(
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networkID,
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cChainBlockchainIdBuf,
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xChainBlockchainIdBuf,
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importedIns,
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evmOutputs
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)
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const unsignedTx: UnsignedTx = new UnsignedTx(importTx)
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const tx: Tx = unsignedTx.sign(cKeychain)
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const id: string = await cchain.issueTx(tx)
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console.log(id)
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}
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main()

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