Submitting a Transaction

Submitting a transfer via the api is a simple process

import { WsProvider, ApiPromise } from "@polkadot/api"

const BOB = '2xBchgbq7aQyGjTotgQvP9Uh76uEWfQWYBpAzJgn5dfsfhsW'
const MNEMONIC = "outer exit wish coconut category liberty fade diagram logic noodle frozen safe"

async function main () {
  // Instantiate the API
  const WATR_ENDPOINT = "wss://rpc.dev.watr.org/"
  const provider: WsProvider = new WsProvider(WATR_ENDPOINT)
  const api = await ApiPromise.create({ provider })

  // Construct the keyring after the API (crypto has an async init)
  const keyring = new Keyring({ type: 'sr25519' })
  keyring.setSS58Format(19)

  // Add account 
  const account = keyring.addFromMnemonic(MNEMONIC)

  // Create a extrinsic, transferring 12345 units to Bob
  const transfer = api.tx.balances.transfer(BOB, 12345);

  // Sign and send the transaction using our account
  const hash = await transfer.signAndSend(account);

  console.log('Transfer sent with hash', hash.toHex());
}