gen_erc20_address.py

import sys
from binascii import hexlify
from ueosio.ds import DataStream, symbol_code_to_uint64

def eos_token_to_erc20(account, symbol_code, precision):
    v=symbol_code_to_uint64(symbol_code)<<8|int(precision)

    ds=DataStream()
    ds.pack_uint64(v)
    ds.pack_name(account)
    return "0x"+hexlify(ds.getvalue()).ljust(40,b'0').decode('ascii')

if __name__ == '__main__':
    if len(sys.argv) < 4:
        print("usage:\n{0} eosio.token EOS 4".format(sys.argv[0]))
        sys.exit(1)
    
    print(eos_token_to_erc20(sys.argv[1], sys.argv[2], sys.argv[3]))