AddressFromBase58 returns Address from encoded base58 string.

AddressParseFromHexString returns parsed Address.

AddressParseFromBytes returns parsed Address.

input a []uint256, create a merkleTree & calc the root hash.

FileExisted checks whether filename exists in filesystem.

GetNonce returns random nonce.

HexToBytes convert hex string to []byte.

TODO Fix the return value to the correct number.

ToHexString convert []byte to hex string.

TODO: temp inventory.

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