308 lines
11 KiB
Python
308 lines
11 KiB
Python
import re
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from function_puller import (
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get_spec,
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SpecObject,
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)
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from argparse import ArgumentParser
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from typing import (
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Dict,
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Optional,
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)
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PHASE0_IMPORTS = '''from typing import (
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Any, Dict, Set, Sequence, Tuple,
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)
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from dataclasses import (
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dataclass,
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field,
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)
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from eth2spec.utils.ssz.ssz_impl import (
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hash_tree_root,
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signing_root,
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)
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from eth2spec.utils.ssz.ssz_typing import (
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bit, boolean, Container, List, Vector, uint64,
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Bytes1, Bytes4, Bytes8, Bytes32, Bytes48, Bytes96, Bitlist, Bitvector,
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)
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from eth2spec.utils.bls import (
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bls_aggregate_pubkeys,
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bls_verify,
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bls_verify_multiple,
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)
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from eth2spec.utils.hash_function import hash
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'''
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PHASE1_IMPORTS = '''from typing import (
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Any, Dict, Optional, Set, Sequence, MutableSequence, Tuple,
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)
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from dataclasses import (
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dataclass,
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field,
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)
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from eth2spec.utils.ssz.ssz_impl import (
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hash_tree_root,
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signing_root,
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serialize,
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is_empty,
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)
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from eth2spec.utils.ssz.ssz_typing import (
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bit, boolean, Container, List, Vector, Bytes, uint64,
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Bytes1, Bytes4, Bytes8, Bytes32, Bytes48, Bytes96, Bitlist, Bitvector,
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)
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from eth2spec.utils.bls import (
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bls_aggregate_pubkeys,
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bls_verify,
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bls_verify_multiple,
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)
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from eth2spec.utils.hash_function import hash
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'''
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SUNDRY_FUNCTIONS = '''
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# Monkey patch hash cache
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_hash = hash
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hash_cache: Dict[bytes, Hash] = {}
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def hash(x: bytes) -> Hash:
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if x not in hash_cache:
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hash_cache[x] = Hash(_hash(x))
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return hash_cache[x]
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# Monkey patch validator compute committee code
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_compute_committee = compute_committee
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committee_cache: Dict[Tuple[Hash, Hash, int, int], Sequence[ValidatorIndex]] = {}
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def compute_committee(indices: Sequence[ValidatorIndex], # type: ignore
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seed: Hash,
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index: int,
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count: int) -> Sequence[ValidatorIndex]:
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param_hash = (hash(b''.join(index.to_bytes(length=4, byteorder='little') for index in indices)), seed, index, count)
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if param_hash not in committee_cache:
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committee_cache[param_hash] = _compute_committee(indices, seed, index, count)
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return committee_cache[param_hash]
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# Access to overwrite spec constants based on configuration
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def apply_constants_preset(preset: Dict[str, Any]) -> None:
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global_vars = globals()
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for k, v in preset.items():
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if k.startswith('DOMAIN_'):
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global_vars[k] = DomainType(v) # domain types are defined as bytes in the configs
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else:
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global_vars[k] = v
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# Deal with derived constants
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global_vars['GENESIS_EPOCH'] = compute_epoch_of_slot(GENESIS_SLOT)
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# Initialize SSZ types again, to account for changed lengths
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init_SSZ_types()
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'''
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def strip_comments(raw: str) -> str:
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comment_line_regex = re.compile(r'^\s+# ')
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lines = raw.split('\n')
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out = []
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for line in lines:
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if not comment_line_regex.match(line):
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if ' #' in line:
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line = line[:line.index(' #')]
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out.append(line)
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return '\n'.join(out)
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def objects_to_spec(functions: Dict[str, str],
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custom_types: Dict[str, str],
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constants: Dict[str, str],
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ssz_objects: Dict[str, str],
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inserts: Dict[str, str],
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imports: Dict[str, str],
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) -> str:
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"""
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Given all the objects that constitute a spec, combine them into a single pyfile.
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"""
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new_type_definitions = (
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'\n\n'.join(
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[
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f"class {key}({value}):\n pass\n"
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for key, value in custom_types.items()
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]
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)
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)
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functions_spec = '\n\n'.join(functions.values())
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for k in list(constants.keys()):
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if k.startswith('DOMAIN_'):
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constants[k] = f"DomainType(({constants[k]}).to_bytes(length=4, byteorder='little'))"
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constants_spec = '\n'.join(map(lambda x: '%s = %s' % (x, constants[x]), constants))
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ssz_objects_instantiation_spec = '\n\n'.join(ssz_objects.values())
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ssz_objects_reinitialization_spec = (
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'def init_SSZ_types() -> None:\n global_vars = globals()\n\n '
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+ '\n\n '.join([strip_comments(re.sub(r'(?!\n\n)\n', r'\n ', value[:-1]))
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for value in ssz_objects.values()])
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+ '\n\n'
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+ '\n'.join(map(lambda x: ' global_vars[\'%s\'] = %s' % (x, x), ssz_objects.keys()))
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)
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spec = (
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imports
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+ '\n\n' + new_type_definitions
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+ '\n\n' + constants_spec
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+ '\n\n\n' + ssz_objects_instantiation_spec
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+ '\n\n' + functions_spec
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+ '\n' + SUNDRY_FUNCTIONS
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+ '\n\n' + ssz_objects_reinitialization_spec
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+ '\n'
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)
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# Handle @inserts
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for key, value in inserts.items():
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spec = re.sub('[ ]*# %s\\n' % key, value, spec)
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return spec
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def combine_functions(old_functions: Dict[str, str], new_functions: Dict[str, str]) -> Dict[str, str]:
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for key, value in new_functions.items():
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old_functions[key] = value
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return old_functions
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def combine_constants(old_constants: Dict[str, str], new_constants: Dict[str, str]) -> Dict[str, str]:
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for key, value in new_constants.items():
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old_constants[key] = value
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return old_constants
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ignored_dependencies = [
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'bit', 'boolean', 'Vector', 'List', 'Container', 'Hash', 'BLSPubkey', 'BLSSignature', 'Bytes', 'BytesN'
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'Bytes1', 'Bytes4', 'Bytes32', 'Bytes48', 'Bytes96', 'Bitlist', 'Bitvector',
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'uint8', 'uint16', 'uint32', 'uint64', 'uint128', 'uint256',
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'bytes' # to be removed after updating spec doc
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]
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def dependency_order_ssz_objects(objects: Dict[str, str], custom_types: Dict[str, str]) -> None:
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"""
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Determines which SSZ Object is depenedent on which other and orders them appropriately
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"""
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items = list(objects.items())
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for key, value in items:
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dependencies = []
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for line in value.split('\n'):
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if not re.match(r'\s+\w+: .+', line):
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continue # skip whitespace etc.
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line = line[line.index(':') + 1:] # strip of field name
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if '#' in line:
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line = line[:line.index('#')] # strip of comment
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dependencies.extend(re.findall(r'(\w+)', line)) # catch all legible words, potential dependencies
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dependencies = filter(lambda x: '_' not in x and x.upper() != x, dependencies) # filter out constants
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dependencies = filter(lambda x: x not in ignored_dependencies, dependencies)
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dependencies = filter(lambda x: x not in custom_types, dependencies)
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for dep in dependencies:
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key_list = list(objects.keys())
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for item in [dep, key] + key_list[key_list.index(dep)+1:]:
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objects[item] = objects.pop(item)
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def combine_ssz_objects(old_objects: Dict[str, str], new_objects: Dict[str, str], custom_types) -> Dict[str, str]:
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"""
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Takes in old spec and new spec ssz objects, combines them,
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and returns the newer versions of the objects in dependency order.
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"""
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for key, value in new_objects.items():
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if key in old_objects:
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# remove trailing newline
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old_objects[key] = old_objects[key]
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# remove leading variable name
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value = re.sub(r'^class [\w]*\(Container\):\n', '', value)
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old_objects[key] = old_objects.get(key, '') + value
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dependency_order_ssz_objects(old_objects, custom_types)
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return old_objects
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# inserts are handeled the same way as functions
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combine_inserts = combine_functions
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def combine_spec_objects(spec0: SpecObject, spec1: SpecObject) -> SpecObject:
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"""
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Takes in two spec variants (as tuples of their objects) and combines them using the appropriate combiner function.
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"""
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functions0, custom_types0, constants0, ssz_objects0, inserts0 = spec0
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functions1, custom_types1, constants1, ssz_objects1, inserts1 = spec1
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functions = combine_functions(functions0, functions1)
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custom_types = combine_constants(custom_types0, custom_types1)
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constants = combine_constants(constants0, constants1)
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ssz_objects = combine_ssz_objects(ssz_objects0, ssz_objects1, custom_types)
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inserts = combine_inserts(inserts0, inserts1)
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return functions, custom_types, constants, ssz_objects, inserts
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def build_phase0_spec(phase0_sourcefile: str, fork_choice_sourcefile: str, outfile: str=None) -> Optional[str]:
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phase0_spec = get_spec(phase0_sourcefile)
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fork_choice_spec = get_spec(fork_choice_sourcefile)
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spec_objects = combine_spec_objects(phase0_spec, fork_choice_spec)
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spec = objects_to_spec(*spec_objects, PHASE0_IMPORTS)
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if outfile is not None:
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with open(outfile, 'w') as out:
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out.write(spec)
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return spec
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def build_phase1_spec(phase0_sourcefile: str,
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phase1_custody_sourcefile: str,
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phase1_shard_sourcefile: str,
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fork_choice_sourcefile: str,
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outfile: str=None) -> Optional[str]:
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phase0_spec = get_spec(phase0_sourcefile)
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phase1_custody = get_spec(phase1_custody_sourcefile)
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phase1_shard_data = get_spec(phase1_shard_sourcefile)
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fork_choice_spec = get_spec(fork_choice_sourcefile)
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spec_objects = phase0_spec
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for value in [phase1_custody, phase1_shard_data, fork_choice_spec]:
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spec_objects = combine_spec_objects(spec_objects, value)
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spec = objects_to_spec(*spec_objects, PHASE1_IMPORTS)
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if outfile is not None:
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with open(outfile, 'w') as out:
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out.write(spec)
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return spec
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if __name__ == '__main__':
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description = '''
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Build the specs from the md docs.
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If building phase 0:
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1st argument is input spec.md
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2nd argument is input fork_choice.md
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3rd argument is output spec.py
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If building phase 1:
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1st argument is input spec_phase0.md
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2nd argument is input spec_phase1_custody.md
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3rd argument is input spec_phase1_shard_data.md
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4th argument is input fork_choice.md
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5th argument is output spec.py
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'''
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parser = ArgumentParser(description=description)
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parser.add_argument("-p", "--phase", dest="phase", type=int, default=0, help="Build for phase #")
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parser.add_argument(dest="files", help="Input and output files", nargs="+")
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args = parser.parse_args()
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if args.phase == 0:
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if len(args.files) == 3:
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build_phase0_spec(*args.files)
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else:
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print(" Phase 0 requires an output as well as spec and forkchoice files.")
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elif args.phase == 1:
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if len(args.files) == 5:
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build_phase1_spec(*args.files)
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else:
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print(" Phase 1 requires an output as well as 4 input files (phase0.md and phase1.md, phase1.md, fork_choice.md)")
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else:
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print("Invalid phase: {0}".format(args.phase))
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