Add splice RBF support#888

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jkczyz wants to merge 22 commits into

lightningdevkit:mainfrom

jkczyz:2026-04-splicing-payment-using-tx-type

Commits on Jun 15, 2026

Commits on Jun 23, 2026

Classify on-chain payments with a durable transaction type

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Commits on Jun 24, 2026

Track channel-open and splice payments through wallet sync

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f - sum contribution net values to classify the funding direction
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f - clarify the wallet-involvement skip comment
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f - log that we skip the payment record, not the broadcast
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f - make BroadcastPackage a struct built from a single broadcast call
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Add bump_channel_funding_fee to fee-bump a pending splice

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f - select the bump feerate from the current estimate and RBF minimum
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Test funding-payment tracking through wallet sync

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Report the confirmed splice candidate's fee, not the last broadcast's

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Cover splice-out classification and funding-payment reorg

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Honor the funding template's RBF minimum feerate when splicing

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Deduplicate the funding feerate ceiling in splice_in and splice_out

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