Create validator.sol

network/blockchain/contracts/PoS/validator.sol

@@ -0,0 +1,36 @@
+import random
+import time
+
+class Validator:
+    def __init__(self, address, stake):
+        self.address = address
+        self.stake = stake
+        self.last_validated = 0
+
+    def is_eligible_to_validate(self):
+        now = int(time.time())
+        if now - self.last_validated > 60:  # validate every minute
+            return True
+        return False
+
+class PoSConsensus:
+    def __init__(self, validators):
+        self.validators = validators
+
+    def select_validator(self):
+        total_stake = sum([v.stake for v in self.validators])
+        stake_sum = 0
+        selected_validator = None
+        for v in self.validators:
+            stake_sum += v.stake / total_stake
+            if random.random() < stake_sum:
+                selected_validator = v
+                break
+        return selected_validator
+
+    def validate_transaction(self, transaction):
+        validator = self.select_validator()
+        if validator.is_eligible_to_validate():
+            # validate the transaction
+            # reward the validator
+            validator.last_validated = int(time.time())