Skip to main content

Send EVM and Solana transactions

This guide shows you how to send transactions on both EVM networks and Solana from a single multichain session — no network switching required.

Prerequisites​

  • A multichain client initialized and connected as shown in the Connect to EVM and Solana guide.
  • For Solana balance queries, install @solana/kit:
npm install @solana/kit

Initialize and connect​

Set up the multichain client and connect to both ecosystems:

import { createMultichainClient } from '@metamask/connect-multichain'

const client = createMultichainClient({
  dapp: {
    name: 'Multichain Demo',
    url: window.location.href,
    iconUrl: 'https://mydapp.com/icon.png',
  },
  api: {
    supportedNetworks: {
      'eip155:1': 'https://mainnet.infura.io/v3/YOUR_INFURA_API_KEY',
      'eip155:137': 'https://polygon-mainnet.infura.io/v3/YOUR_INFURA_API_KEY',
      'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp': 'https://api.mainnet-beta.solana.com',
    },
  },
})

await client.connect(['eip155:1', 'eip155:137', 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp'], [])

const session = await client.getSession()

Send an EVM transaction​

Use invokeMethod to send a transaction on any EVM chain in the session:

const ethAccounts = session.sessionScopes['eip155:1']?.accounts || []

if (ethAccounts.length > 0) {
  const fromAddress = ethAccounts[0].split(':')[2] // Extract address from CAIP-10

  const txHash = await client.invokeMethod({
    scope: 'eip155:1',
    request: {
      method: 'eth_sendTransaction',
      params: [
        {
          from: fromAddress,
          to: '0x4B0897b0513FdBeEc7C469D9aF4fA6C0752aBea7',
          value: '0x29a2241af62c0000', // 3 ETH in wei
        },
      ],
    },
  })
  console.log('ETH tx hash:', txHash)
}

Target a different chain by changing the scope — for example, eip155:137 for Polygon:

const polAccounts = session.sessionScopes['eip155:137']?.accounts || []

if (polAccounts.length > 0) {
  const fromAddress = polAccounts[0].split(':')[2]

  const txHash = await client.invokeMethod({
    scope: 'eip155:137',
    request: {
      method: 'eth_sendTransaction',
      params: [
        {
          from: fromAddress,
          to: '0x4B0897b0513FdBeEc7C469D9aF4fA6C0752aBea7',
          value: '0x2386F26FC10000', // 0.01 POL in wei
        },
      ],
    },
  })
  console.log('POL tx hash:', txHash)
}

Send a Solana transaction​

Use invokeMethod with the solana_signAndSendTransaction method:

const solAccounts = session.sessionScopes['solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp']?.accounts || []

if (solAccounts.length > 0) {
  const result = await client.invokeMethod({
    scope: 'solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp',
    request: {
      method: 'solana_signAndSendTransaction',
      params: {
        transaction: '<base64-encoded-transaction>',
      },
    },
  })
  console.log('SOL tx signature:', result)
}

Next steps​

On this page