introduce GetActionID

chain/dependencies.go

@@ -231,6 +231,10 @@ type Object interface {
 type Action interface {
 	Object
 
+	// GetActionID returns the ActionID for an [Action] in a [Transaction]. There may be
+	// multiple [Action]s, so we pass its index in the [Action] array along with the txID.
+	GetActionID(idx uint8, txID ids.ID) codec.Address
+
 	// MaxComputeUnits is the maximum amount of compute a given [Action] could use. This is
 	// used to determine whether the [Action] can be included in a given block and to compute
 	// the required fee to execute.

examples/morpheusvm/actions/transfer.go

@@ -31,6 +31,10 @@ func (*Transfer) GetTypeID() uint8 {
 	return mconsts.TransferID
 }
 
+func (*BurnAsset) GetActionID(idx uint8, txID ids.ID) codec.Address {
+	return codec.CreateAddress(idx, txID)
+}
+
 func (t *Transfer) StateKeys(actor codec.Address, _ ids.ID) state.Keys {
 	return state.Keys{
 		string(storage.BalanceKey(actor)): state.Read | state.Write,