EVM

The Ethereum Virtual Machine (EVM) is the shared execution environment used by networks such as Ethereum, Base, Arbitrum, Optimism, and Polygon. EVM transactions can transfer native tokens or call Solidity smart contracts using ABI-encoded calldata.

Follow these steps to submit and track a simple transaction on an EVM-compatible chain.

Import the SDK

import { Tachyon, ChainId } from '@rathfi/tachyon'

Initialize the Tachyon Client

const tachyon = new Tachyon({
  apiKey: 'API-KEY',
})

Submit a Transaction

const txId = await tachyon.relay({
  chainId: ChainId.BASE, // 8453
  to: '0x3dbE34f2C21b3B2980d4dc53f3c7E51e39663F49',
  value: '1', // 1 wei
  callData: '0x',
  label: 'My Base Transaction',
})

console.log('Transaction submitted with ID:', txId)

Check Transaction Status

const status = await tachyon.getRelayStatus(txId)
console.log('Transaction status:', status.status)

Wait for Execution

const executedTx = await tachyon.waitForExecutionHash(txId)
console.log('Execution hash:', executedTx.executionTxHash)

Call a Smart Contract

Encode the contract function and arguments into callData, set to to the contract address, and relay the transaction through the same flow.

import { Tachyon, ChainId } from '@rathfi/tachyon'
import { ethers } from 'ethers'

const tachyon = new Tachyon({ apiKey: 'YOUR_API_KEY' })
const iface = new ethers.Interface(['function sayHello(string message)'])
const callData = iface.encodeFunctionData('sayHello', ['Hello from Tachyon!'])

const txId = await tachyon.relay({
  chainId: ChainId.BASE,
  to: '0xA7A833e6641D7901F30EaD6f27d4Ee2C9bb670a7',
  value: '0',
  callData,
  label: 'Say Hello Example',
})

curl -X POST https://tachyon.rath.fi/api/submit-tx \
  -H "api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "chainId": 8453,
    "to": "0xA7A833e6641D7901F30EaD6f27d4Ee2C9bb670a7",
    "value": "0",
    "callData": "0xc3a9b1c50000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000001348656c6c6f2066726f6d2054616368796f6e2100000000000000000000000000",
    "label": "Hello From Tachyon Call"
  }'