Imports github.com/MegaGrindStone/btcd/chaincfg github.com/MegaGrindStone/btcd/txscript github.com/MegaGrindStone/btcd/wire github.com/MegaGrindStone/btcutil github.com/MegaGrindStone/btcwallet/wallet/txrules github.com/MegaGrindStone/btcwallet/wallet/txsizes Standard library imports crypto/rand encoding/binary errors math/rand sync