Veemcode |work|

| Feature | Description | |---------|-------------| | | uuidv4() per request. | | Custom key | Pass options.idempotencyKey to any mutating call (e.g., client.payments.create(payment, idempotencyKey: 'order-1234' ) ). | | Replay safety | If the same key is submitted twice, Veem returns the original response (status 200) rather than creating a duplicate payment. | | Storage | In server‑side deployments you can store the key + response hash in a DB (Redis, Postgres) for auditability. |

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| Pillar | Implementation Details | |--------|------------------------| | | All request/response models are generated from the OpenAPI spec using OpenAPI Generator . This guarantees that the SDK stays in lockstep with the API. | | Zero‑Trust Networking | Every outbound request uses TLS 1.2+ with certificate pinning (where supported). The SDK refuses to send credentials over plain HTTP. | | Idempotency‑First | By default every “create payment” call includes a UUID‑v4 Idempotency-Key . Developers can override the key to tie it to an internal transaction ID. | | Retry & Circuit‑Breaker | Exponential back‑off (base = 500 ms, jitter = ±10 %) up to 5 attempts. If the API returns HTTP 5xx or a network timeout, the SDK triggers a circuit‑breaker (Open‑Close‑Half‑Open) to protect downstream services. | | Observability | Integrated with OpenTelemetry – emits spans for request latency, status, and error codes. Optional logging adapters for Winston (Node), Logback (Java), etc. | | Extensible Middleware | Developers can inject request/response interceptors (e.g., for custom tracing headers or metric collection). | | Security‑by‑Design | Sensitive fields (bank account, SWIFT, IBAN) are encrypted client‑side using Veem‑provided public RSA key before transmission, complying with PCI‑DSS and GDPR. | | Testability | A sandbox endpoint ( https://sandbox-api.veem.com ) mirrors production responses with deterministic data; a mock server ( veemcode-mock ) ships with the SDK for unit tests. | | Feature | Description | |---------|-------------| | |