Exit quiescence when `splice_init` and `tx_init_rbf` are rejected#4495

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jkczyz wants to merge 7 commits intolightningdevkit:mainfrom

jkczyz:2026-03-splicing-rbf-follow-ups

Commits on Mar 17, 2026

Move feerate parameters from splice_channel/rbf_channel to FundingTemplate

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Commits on Mar 18, 2026

Adjust contribution feerate to minimum RBF feerate in funding_contributed

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Merge rbf_channel into splice_channel and expose prior contribution

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Use +25 sat/kwu increment for our minimum RBF feerate

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Exit quiescence when tx_init_rbf is rejected with Abort

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Exit quiescence when splice_init is rejected with Abort

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Return InteractiveTxMsgError from splice_init and tx_init_rbf

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