Add taproot and musig2 helpers for taproot gossip support#107
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Add taproot and musig2 helpers for taproot gossip support#107
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We add a helper function to extract the output key of a p2tr output. If the output is *not* using p2tr, it safely returns `None`.
We provide high-level functions that hide the internal signing session object and allow signing arbitrary messages, similar to the helpers we already have to sign taproot inputs.
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We add several helpers that become useful when implementing support for taproot gossip to verify channel announcements: see https://github.com/ellemouton/bolts/blob/bolt-taproot-gossip/bolt-taproot-gossip.md#taproot-channel-proof-and-verification for more details.
See ACINQ/bitcoin-kmp#178