AddressFromBase58 returns Address from encoded base58 string.

AddressParseFromHexString returns parsed Address.

AddressParseFromBytes returns parsed Address.

neo encoding: https://docs.microsoft.com/en-us/dotnet/api/system.numerics.biginteger.tobytearray?view=netframework-4.7.2.

param hashes will be used as workspace.

FileExisted checks whether filename exists in filesystem.

GetNonce returns random nonce.

HexToBytes convert hex string to []byte.

val should in i128 range.

NewReader returns a new ZeroCopySink reading from b.

NewReader returns a new ZeroCopySource reading from b.

ToHexString convert []byte to hex string.

just to avoid dos.

TODO: temp inventory.

the 64 bit fixed-point number, precise 10^-8.