Create token.py

src/blockchain/token.py

@@ -0,0 +1,45 @@
+class Token:
+    def __init__(self, name, symbol, total_supply):
+        self.name = name
+        self.symbol = symbol
+        self.total_supply = total_supply
+        self.balances = {}
+        self.allowances = {}
+
+    def transfer(self, sender, recipient, amount):
+        if self.balances.get(sender, 0) >= amount:
+            self.balances[sender] -= amount
+            self.balances[recipient] = self.balances.get(recipient, 0) + amount
+            return True
+        return False
+
+    def approve(self, owner, spender, amount):
+        if owner not in self.allowances:
+            self.allowances[owner] = {}
+        self.allowances[owner][spender] = amount
+        return True
+
+    def transfer_from(self, spender, owner, recipient, amount):
+        if self.allowances.get(owner, {}).get(spender, 0 ) >= amount and self.balances.get(owner, 0) >= amount:
+            self.balances[owner] -= amount
+            self.balances[recipient] = self.balances.get(recipient, 0) + amount
+            self.allowances[owner][spender] -= amount
+            return True
+        return False
+
+    def balance_of(self, owner):
+        return self.balances.get(owner, 0)
+
+    def total_supply(self):
+        return self.total_supply
+
+    def mint(self, recipient, amount):
+        self.total_supply += amount
+        self.balances[recipient] = self.balances.get(recipient, 0) + amount
+
+    def burn(self, owner, amount):
+        if self.balances.get(owner, 0) >= amount:
+            self.balances[owner] -= amount
+            self.total_supply -= amount
+            return True
+        return False