multi: Integrate mixpool and propagate p2p mixing messages #3208
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The mixpool package implements a memory pool of recently observed mix messages. Similar to the transaction mempool, the mixpool allows these messages to be temporarily stored in memory to be relayed through the P2P network. It handles message acceptance, expiry, UTXO ownership proof checks, and that previously referenced messages have also been accepted to the mixpool. The mixpool is designed with both full-node and wallet usage in mind, providing all of these same acceptance rules to mixing wallets with the exception of UTXO proof checks. For wallets, it also implements query functions for messages matching compatible pairings and messages belong to ongoing sessions.
This commit adds the mixing message pool to the server and listens for all peer-to-peer mixing messages broadcast on the network. If these messages are able to be accepted to the mixpool, they are relayed to other peers through the inventory system, and notified to RPC clients. This commit also also adds support for publishing and receiving mix messages over JSON-RPC for non-SPV wallet clients.
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This commit adds the mixing message pool to the server and listens for all
peer-to-peer mixing messages broadcast on the network. If these messages are
able to be accepted to the mixpool, they are relayed to other peers through
the inventory system, and notified to RPC clients.
This commit also also adds support for publishing and receiving mix messages
over JSON-RPC for non-SPV wallet clients.
Requires #3207.
Requires #3082.