# Transaction Finality

PolkadotJS API provides **signAndSend** function to send a transaction, the callback will yield information around the transaction pool status as well as any events when `isInBlock` or `isFinalized`.  If you receive the `isFinalized` event, then your transaction is considered as finality and will never be reverted.

## Sample Code

```javascript
const API = require("@polkadot/api");
const cloverTypes = require('@clover-network/node-types');

async function sendCLV(address, amount) {
  const wsProvider = new API.WsProvider('wss://api-ivy.clover.finance');
  const api = await API.ApiPromise.create({
    provider: wsProvider,
    types: cloverTypes
  });
  const nonce = await api.rpc.system.accountNextIndex('your CLV address configured somewhere');
  const keyring = new API.Keyring({ type: 'sr25519' });
  const signer = keyring.addFromUri('your seeds configured somewhere');
  return new Promise( (resolve, reject) => {
    api.tx.balances
      .transfer(address, amount)
      .signAndSend(signer, {
        nonce,
      }, ({ events = [], status }) => {
        if (status.isFinalized) {
          // filter events and check balances.transfer is succeed
          resolve({ success: true });
        }
        if (status.isDropped || status.isInvalid || status.isUsurped) {
          resolve({ success: false });
        }
      });
  });
}
```


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