lndclient: block until chain notifier is ready #259
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LND commit c6f458e478f9 (v0.20.0-rc3) moved ChainNotifier startup later in the lifecycle, so RegisterBlockEpochNtfn callers now see "chain notifier RPC is still in the process of starting" coming from Recv(). The new BlockUntilChainNotifier config option repeatedly calls RegisterBlockEpochNtfn during startup and only proceeds once the stream yields its first block height, retrying solely when we detect the ErrChainNotifierServerNotActive condition introduced by the LND commit above.
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ziggie1984
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Nov 20, 2025
ziggie1984
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I think we should follow a similar strategy than LND, everything goes to master first and is then backported to the necessary release-branches.
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Agree. I merged it originally to |
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This PR ports #255 to
masterLND commit lightningnetwork/lnd@c6f458e (v0.20.0-rc3) moved ChainNotifier startup later in the lifecycle, so RegisterBlockEpochNtfn callers now see "chain notifier RPC is still in the process of starting" coming from Recv().
The new BlockUntilChainNotifier config option repeatedly calls RegisterBlockEpochNtfn during startup and only proceeds once the stream yields its first block height, retrying solely when we detect the ErrChainNotifierServerNotActive condition introduced by the LND commit above.
The wait is guarded by a "chainrpc" build-tag check, so deployments without the ChainNotifier service fail fast when the option is requested.
Pull Request Checklist
in
lnd_services.goare updated.macaroon_recipes.goif your PR adds a new method that is calleddifferently than the RPC method it invokes.