EstimateSerializeSize returns a worst case serialize size estimate for a signed transaction that spends inputCount number of compressed P2PKH outputs and contains each transaction output from txOuts.

EstimateVirtualSize returns a worst case virtual size estimate for a signed transaction that spends the given number of P2PKH, P2WPKH and (nested) P2SH-P2WPKH outputs, and contains each transaction output from txOuts.

P2PKHOutputSize is the serialize size of a transaction output with a P2PKH output script.

P2PKHPkScriptSize is the size of a transaction output script that pays to a compressed pubkey hash.

RedeemP2PKHInputSize is the worst case (largest) serialize size of a transaction input redeeming a compressed P2PKH output.

RedeemP2PKHSigScriptSize is the worst case (largest) serialize size of a transaction input script that redeems a compressed P2PKH output.