Antoine Riard e73036c684 Implement concurrent broadcast tolerance for distributed watchtowers ... With a distrbuted watchtowers deployment, where each monitor is plugged to its own chain view, there is no guarantee that block are going to be seen in same order. Watchtower may diverge in their acceptance of a submitted `commitment_signed` update due to a block timing-out a HTLC and provoking a subset but yet not seen by the other watchtower subset. Any update reject by one of the watchtower must block offchain coordinator to move channel state forward and release revocation secret for previous state. In this case, we want any watchtower from the rejection subset to still be able to claim outputs if the concurrent state, has accepted by the other subset, is confirming. This improve overall watchtower system fault-tolerance. This change stores local commitment transaction unconditionally and fail the update if there is knowledge of an already signed commitment transaction (ChannelMonitor.local_tx_signed=true).		2020-09-15 18:17:35 -04:00
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src	Implement concurrent broadcast tolerance for distributed watchtowers	2020-09-15 18:17:35 -04:00
Cargo.toml	Update to latest upstream rust-bitcoin	2020-09-10 16:20:01 -04:00