105 lines
2.6 KiB
Python
105 lines
2.6 KiB
Python
import sys
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import function_puller
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def build_phase0_spec(sourcefile, outfile):
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code_lines = []
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code_lines.append("""
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from typing import (
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Any,
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Callable,
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Dict,
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List,
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NewType,
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Tuple,
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)
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from eth2spec.utils.minimal_ssz import *
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from eth2spec.utils.bls_stub import *
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""")
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for i in (1, 2, 3, 4, 8, 32, 48, 96):
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code_lines.append("def int_to_bytes%d(x): return x.to_bytes(%d, 'little')" % (i, i))
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code_lines.append("""
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# stub, will get overwritten by real var
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SLOTS_PER_EPOCH = 64
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def slot_to_epoch(x): return x // SLOTS_PER_EPOCH
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Slot = NewType('Slot', int) # uint64
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Epoch = NewType('Epoch', int) # uint64
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Shard = NewType('Shard', int) # uint64
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ValidatorIndex = NewType('ValidatorIndex', int) # uint64
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Gwei = NewType('Gwei', int) # uint64
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Bytes32 = NewType('Bytes32', bytes) # bytes32
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BLSPubkey = NewType('BLSPubkey', bytes) # bytes48
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BLSSignature = NewType('BLSSignature', bytes) # bytes96
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Any = None
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Store = None
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""")
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code_lines += function_puller.get_spec(sourcefile)
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code_lines.append("""
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# Monkey patch validator get committee code
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_compute_committee = compute_committee
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committee_cache = {}
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def compute_committee(validator_indices: List[ValidatorIndex],
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seed: Bytes32,
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index: int,
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total_committees: int) -> List[ValidatorIndex]:
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param_hash = (hash_tree_root(validator_indices), seed, index, total_committees)
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if param_hash in committee_cache:
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# print("Cache hit, epoch={0}".format(epoch))
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return committee_cache[param_hash]
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else:
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# print("Cache miss, epoch={0}".format(epoch))
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ret = _compute_committee(validator_indices, seed, index, total_committees)
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committee_cache[param_hash] = ret
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return ret
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# Monkey patch hash cache
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_hash = hash
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hash_cache = {}
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def hash(x):
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if x in hash_cache:
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return hash_cache[x]
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else:
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ret = _hash(x)
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hash_cache[x] = ret
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return ret
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# Access to overwrite spec constants based on configuration
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def apply_constants_preset(preset: Dict[str, Any]):
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global_vars = globals()
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for k, v in preset.items():
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global_vars[k] = v
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# Deal with derived constants
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global_vars['GENESIS_EPOCH'] = slot_to_epoch(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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with open(outfile, 'w') as out:
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out.write("\n".join(code_lines))
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if __name__ == '__main__':
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if len(sys.argv) < 3:
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print("Usage: <source phase0> <output phase0 pyspec>")
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build_phase0_spec(sys.argv[1], sys.argv[2])
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