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Upgrade to Bitcoin Core 32.1 - #3425

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prepare-for-bitcoin-32
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sstone wants to merge 2 commits into
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prepare-for-bitcoin-32

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@sstone

@sstone sstone commented Oct 29, 2026

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Bitcoin Core 32.1 includes improvements to the txospenderindex that we want to use.
⚠️ once this PR is merged, eclair will require bitcoin core 32 or higher: you must upgrade bitcoin core first then eclair.

Bitcoin Core v32 modified its fee estimator. Once the regtest node has seen 6 blocks and the block-policy estimator has some data the discard rate collapses to the dust-relay floor of 3 sat/vB instead of ~10 before.
We change our test to use smaller inputs to make sure that no change inputs will be added.
Test sill passes on bitcoin 31.X but now works for Bicoin 32.x
It includes improvement to the txospender index that we want to use in Eclair.

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