b6722ee83b
Add hand-written SDK helper files (pda.ts, listing.ts, order.ts) with GPA-based account fetching, discriminator filters, PDA derivation helpers, and escrow ID derivation. Add pda.test.ts with 4 unit tests (all passing). Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
31 lines
1.2 KiB
TypeScript
31 lines
1.2 KiB
TypeScript
import { address, getAddressEncoder, type Address, type ProgramDerivedAddress } from '@solana/kit'
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import { findListingAccountPda, findOrderAccountPda } from './generated/solisting/src/generated/index.js'
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const PROGRAM_ADDRESS = address('DzwUAbpRvqcbA8QsEkRbZeXG4TEho5782cMySodrUHBU')
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export async function findListingPda(
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seller: Address,
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listingId: bigint,
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): Promise<ProgramDerivedAddress> {
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return findListingAccountPda({ seller, listingId }, { programAddress: PROGRAM_ADDRESS })
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}
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export async function findOrderPda(
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listingAccount: Address,
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buyer: Address,
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orderId: bigint,
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): Promise<ProgramDerivedAddress> {
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return findOrderAccountPda({ listingAccount, buyer, orderId }, { programAddress: PROGRAM_ADDRESS })
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}
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/**
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* Replicates the program's escrow_id derivation:
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* u64::from_le_bytes(order_pda.to_bytes()[0..8])
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* Must match exactly — used when building create_order instructions.
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*/
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export function deriveEscrowId(orderPda: Address): bigint {
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const bytes = getAddressEncoder().encode(orderPda) // 32-byte Uint8Array
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const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength)
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return view.getBigUint64(0, true) // little-endian, first 8 bytes
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}
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