Add more functionality to the vesting skeleton

src/vesting.cairo

@@ -5,7 +5,7 @@ trait IVesting<TContractState> {
     fn vest(ref self: TContractState, grantee: ContractAddress, vested_timestamp: u64);
 
     fn add_vesting_milestone(
-        ref self: TContractState, vesting_timestamp: u64, grantee: ContractAddress
+        ref self: TContractState, vesting_timestamp: u64, grantee: ContractAddress, amount: u128
     );
 // add_linear_vesting_schedule
 // add_cliff_linear_vesting_schedule
@@ -15,11 +15,25 @@ trait IVesting<TContractState> {
 
 #[starknet::component]
 mod vesting {
+    // TODO: must depend on Ownable or Proposals to clarify who has the right to add vesting milestones
     #[storage]
     struct Storage {
         milestone: LegacyMap::<(u64, ContractAddress), u128>
     }
 
+    #[derive(starknet::Event, Drop)]
+    #[event]
+    enum Event {
+        VestingMilestoneAdded: VestingMilestoneAdded
+    }
+
+    #[derive(starknet::Event, Drop)]
+    struct VestingMilestoneAdded {
+        grantee: ContractAddress,
+        timestamp: u64,
+        amount: u128
+    }
+
     #[embeddable_as(VestingImpl)]
     impl Vesting<
         TContractState, +HasComponent<TContractState>
@@ -28,12 +42,20 @@ mod vesting {
             ref self: ComponentState<TContractState>,
             grantee: ContractAddress,
             vested_timestamp: u64
-        ) {}
+        ) {
+            let amt_to_vest = self.milestone.read((vested_timestamp, grantee));
+            assert(amt_to_vest != 0, 'no vesting milestone found');
+        }
 
         fn add_vesting_milestone(
             ref self: ComponentState<TContractState>,
             vesting_timestamp: u64,
-            grantee: ContractAddress
-        ) {}
+            grantee: ContractAddress,
+            amount: u128
+        ) {
+            // TODO: check if caller is eligible to add vesting milestone or if this is part of a proposal
+            self.milestone.write((vested_timestamp, grantee), amount);
+            self.emit(VestingMilestoneAdded { grantee: grantee, timestamp: vesting_timestamp, amount: u128})
+        }
     }
 }