Recalculate listeners' best block heights on each retry #471
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Previously, we would calculate each listener's best block height outside of the `loop`, which will have us retrying `init::synchronize_listeners` with stale data, potentially leading to panicking as we might try to connect blocks from the original height to listeners that might have been advanced by the previous itertation of the `loop` before hitting an error. Here, we mitigate this by simply retrieving the current best block height for each listener at the start of each iteration.
jkczyz
approved these changes
Feb 13, 2025
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| let mut chain_listeners = vec![ | ||
| ( | ||
| onchain_wallet_best_block_hash, | ||
| &**onchain_wallet as &(dyn Listen + Send + Sync), | ||
| ), | ||
| ( | ||
| channel_manager_best_block_hash, | ||
| &*channel_manager as &(dyn Listen + Send + Sync), | ||
| ), | ||
| (sweeper_best_block_hash, &*output_sweeper as &(dyn Listen + Send + Sync)), | ||
| ]; |
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Discussed offline that making current_best_block a method on Listen would be useful. It simplifies the API and would avoid needing to allocate a Vec on each iteration.
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Previously, we would calculate each listener's best block height outside of the
loop, which will have us retryinginit::synchronize_listenerswith stale data, potentially leading to panicking as we might try to connect blocks from the original height to listeners that might have been advanced by the previous itertation of theloopbefore hitting an error. Here, we mitigate this by simply retrieving the current best block height for each listener at the start of each iteration.