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- import struct
- def varuint(value):
- if value <= 0xfc:
- return struct.pack("<B", value)
- elif value <= 0xffff:
- return struct.pack("<BH", 0xfd, value)
- elif value <= 0xffffffff:
- return struct.pack("<BI", 0xfe, value)
- else:
- return struct.pack("<BQ", 0xff, value)
- def write_len(output, objects):
- output.write(varuint(len(objects)))
- def write_value(fmt, output, value):
- value_bytes = struct.pack("<" + fmt, value)
- output.write(value_bytes)
- def write_u8(output, value):
- write_value("B", output, value)
- def write_u32(output, value):
- write_value("I", output, value)
- def output_contract(output, contract):
- write_len(output, contract.name)
- output.write(contract.name.encode())
- write_len(output, contract.witness)
- for type_id, variable, _ in contract.witness:
- write_len(output, variable)
- output.write(variable.encode())
- write_u8(output, type_id)
- write_len(output, contract.code)
- for code in contract.code:
- func_id = code.func_format.func_id
- write_u8(output, func_id)
- for arg_idx in code.arg_idxs:
- write_u32(output, arg_idx)
- def output(output, contracts, constants):
- write_len(output, constants.variables())
- for variable in constants.variables():
- write_len(output, variable)
- output.write(variable.encode())
- type_id = constants.lookup(variable)
- write_u8(output, type_id)
- write_len(output, contracts)
- for contract in contracts:
- output_contract(output, contract)
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