Fix getProgramDerivedAddress() Example to Destructure as an Array Instead of an Object

[sebastien3k]

packages/addresses/README.md

has the following example:

import { getAddressEncoder, getProgramDerivedAddress } from '@solana/addresses';

const addressEncoder = getAddressEncoder();
const { bumpSeed, pda } = await getProgramDerivedAddress({
    programAddress: 'ATokenGPvbdGVxr1b2hvZbsiqW5xWH25efTNsLJA8knL' as Address,
    seeds: [
        // Owner
        addressEncoder.encode('9fYLFVoVqwH37C3dyPi6cpeobfbQ2jtLpN5HgAYDDdkm' as Address),
        // Token program
        addressEncoder.encode('TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA' as Address),
        // Mint
        addressEncoder.encode('EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v' as Address),
    ],
});

Following a tutorial from QuickNode https://www.quicknode.com/guides/solana-development/tooling/web3-2/account-deserialization they provided this example:

async function main() {
    // Create encoders for PDA derivation
    const u16BEEncoder = getU16Encoder({ endian: Endian.Big });

    // Derive config account address
    const [configPda] = await getProgramDerivedAddress({
        programAddress: PROGRAM_ID,
        seeds: [
            AMM_CONFIG_SEED,
            u16BEEncoder.encode(AMM_CONFIG_INDEX),
        ]
    });

    console.log(`Parsing AMM Config PDA: ${configPda}`);

    // TODO - fetch and parse PDA
}

main().catch(console.error);

The latter worked as intended while the former did not. Examining getProgramDerivedAddress() from 'packages/addresses/src/program-derived-address.ts' seems to confirm the function returns an array. If this is the case, documentation should be updated to reflect that. I initially thought there was an issue with how my seeds were encoded, especially since I’m not using TypeScript. If the current documentation is correct and I’m missing something, feel free to disregard!

[steveluscher]

Thank you!