RBF splice funding transactions#4427

Draft

jkczyz wants to merge 20 commits intolightningdevkit:mainfrom

jkczyz:2026-02-splicing-rbf

Commits on Feb 17, 2026

Commits on Feb 19, 2026

Accept tx_init_rbf for pending splice transactions

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Allow multiple RBF splice candidates in channel monitor

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Add rbf_channel API for initiating splice RBF

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Send tx_init_rbf instead of splice_init when a splice is pending

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Handle tx_ack_rbf on the initiator side

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Test end-to-end RBF splice initiator flow

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Allow acceptor contribution to RBF splice via tx_init_rbf

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Adjust acceptor's contribution for initiator's feerate in splices

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