Get Block hash from transfer in polkadot.js/api

Question

I created kusama transfer function using polkadot.js/api.
I followed https://polkadot.js.org/docs/api/examples/promise/make-transfer.

I can get extrinsic hash from above. I want to get extrinsic detail to check if transaction is success or not.
According to my check, it is impossible to check extrinsic detail with hash only.
Extrinsic Hash and Block number are both needed.

https://polkadot.js.org/docs/api/examples/promise/transfer-events
I also tried callback, but it doesn't show blockhash for me. When I log status, it is just {ready: null}

How can I get block number or block hash from transfer?

Answer 1

To get the blockHash where it has been included your transaction, you can send it and then wait until it has been included in the block using a subscription.

const unsub = await api.tx.balances.transfer(BOB, 12345).signAndSend(alice, (result) => {
    console.log(`Current status is ${result.status}`);

    if (result.status.isInBlock) {
      console.log(`Transaction included at blockHash ${result.status.asInBlock}`);
    } else if (result.status.isFinalized) {
      console.log(`Transaction finalized at blockHash ${result.status.asFinalized}`);
      unsub();
    }
  });

Then you can get the block information(number, hash...) and the extrinsics in that block:

const blockHash = result.status.asFinalized;
const signedBlock = await api.rpc.chain.getBlock(blockHash);
console.log(signedBlock.toHuman());
const extrinsics = signedBlock.block.extrinsics;
console.log(extrinsics.toHuman())