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What
Improve utxo selection process for DLC creation
Specifically add
getInputsForDualFunding
which accounts for DLC offer/accept fees using AtomicFinance/node-dlc#206dualFundingCoinSelect
which calculates DLC funding and execution fees an accounts for this in input selection.Why
Since it's a dual funded transaction, each user pays for half of the base tx fees, and their share of the inputs they provide, which ends up being less than a typical transaction.
This fixes edge cases where there might not be enough inputs in a typical scenario for a single funded transaction, but there in fact is enough for a dual funded one.