Solana stake account HTTP getProgramAccounts

export const getStakeAccounts = async (connection: Connection, withdrawAuthority: PublicKey | null, stakeAuthority: PublicKey | null): Promise<{
    pubkey: PublicKey;
    account: AccountInfo<ParsedAccountData>;
}[]> => {
    if (!stakeAuthority && !withdrawAuthority) {
        throw new Error('At least one authority must be provided')
    }

    const filters: GetProgramAccountsFilter[] = []
    if (stakeAuthority) {
        filters.push({
            memcmp: {
                bytes: stakeAuthority.toBase58(),
                offset: 4 + 8
            }
        })
    }
    if (withdrawAuthority) {
        filters.push({
            memcmp: {
                bytes: withdrawAuthority.toBase58(),
                offset: 4 + 8 + 32
            }
        })
    }

    const stakeAccounts = await connection.getParsedProgramAccounts(StakeProgram.programId, { filters })

    return stakeAccounts as {
        pubkey: PublicKey;
        account: AccountInfo<ParsedAccountData>;
    }[]
}