feat: add generateIdempotencyKey for canonical payment deduplication (Closes #612) - #627
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waterWang wants to merge 1 commit into
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feat: add generateIdempotencyKey for canonical payment deduplication (Closes #612)#627waterWang wants to merge 1 commit into
waterWang wants to merge 1 commit into
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Add generateIdempotencyKey for canonical payment deduplication
Implements #612.
Changes
src/dedup.ts: Added:generateIdempotencyKey({ invoiceId, payer, amount, nonce? })— deterministic SHA-256 hex key from"{invoiceId}:{payer}:{amount}"with optional:{nonce}suffix (Node.jscrypto.createHash, no external deps)isKnownKey(key)/registerKey(key)— backed by an in-memorySetclearKeys()— test teardown helpersrc/index.ts: ExportedgenerateIdempotencyKey,isKnownKey,registerKey,clearKeys, and theGenerateIdempotencyKeyParamstype.test/idempotencyKey.test.ts: 9 unit tests covering determinism, hex format, different-amount/different-payer/different-nonce key divergence, and key registration lifecycle.Test results