setTransactionMessageLifetimeUsingDurableNonce

import { setTransactionMessageLifetimeUsingDurableNonce } from '@solana/transactions';
 
const NONCE_VALUE_OFFSET =
    4 + // version(u32)
    4 + // state(u32)
    32; // nonce authority(pubkey)
// Then comes the nonce value.
 
const nonceAccountAddress = address('EGtMh4yvXswwHhwVhyPxGrVV2TkLTgUqGodbATEPvojZ');
const nonceAuthorityAddress = address('4KD1Rdrd89NG7XbzW3xsX9Aqnx2EExJvExiNme6g9iAT');
const { value: nonceAccount } = await rpc
    .getAccountInfo(nonceAccountAddress, {
        dataSlice: { length: 32, offset: NONCE_VALUE_OFFSET },
        encoding: 'base58',
    })
    .send();
const nonce =
    // This works because we asked for the exact slice of data representing the nonce
    // value, and furthermore asked for it in `base58` encoding.
    nonceAccount!.data[0] as unknown as Nonce;
 
const durableNonceTransactionMessage = setTransactionMessageLifetimeUsingDurableNonce(
    { nonce, nonceAccountAddress, nonceAuthorityAddress },
    tx,
);