import hashlib
import json
from typing import List, Dict
class DataHelpers:
@staticmethod
def build_merkle_tree(data_list: List[str]) -> str:
"""Build Merkle root from data list."""
if not data_list:
return ""
hashes = [hashlib.sha256(d.encode()).hexdigest() for d in data_list]
while len(hashes) > 1:
if len(hashes) % 2 == 1:
hashes.append(hashes[-1])
hashes = [hashlib.sha256((hashes[i] + hashes[i+1]).encode()).hexdigest() for i in range(0, len(hashes), 2)]
return hashes[0]
@staticmethod
def validate_merkle_proof(root: str, proof: List[str], leaf: str) -> bool:
"""Validate Merkle proof."""
current = hashlib.sha256(leaf.encode()).hexdigest()
for sibling in proof:
current = hashlib.sha256((current + sibling).encode()).hexdigest()
return current == root
@staticmethod
def normalize_sim_data(data: Dict) -> Dict:
"""Normalize sim outputs for contracts/oracles."""
return {k: float(v) if isinstance(v, (int, float)) else str(v) for k, v in data.items()}
# Example
helpers = DataHelpers()
root = helpers.build_merkle_tree(["data1", "data2"])
print("Merkle Root:", root)
