Add CheckExpirationCondition to UnlockConditionSet

go.mod

@@ -28,7 +28,6 @@ require (
 	github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 // indirect
 	github.com/holiman/uint256 v1.2.3 // indirect
 	github.com/iancoleman/orderedmap v0.3.0 // indirect
-	github.com/iotaledger/hive.go/codegen v0.0.0-20231005142627-86973b2edb3b // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/mr-tron/base58 v1.2.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect

go.sum

@@ -23,8 +23,6 @@ github.com/holiman/uint256 v1.2.3 h1:K8UWO1HUJpRMXBxbmaY1Y8IAMZC/RsKB+ArEnnK4l5o
 github.com/holiman/uint256 v1.2.3/go.mod h1:SC8Ryt4n+UBbPbIBKaG9zbbDlp4jOru9xFZmPzLUTxw=
 github.com/iancoleman/orderedmap v0.3.0 h1:5cbR2grmZR/DiVt+VJopEhtVs9YGInGIxAoMJn+Ichc=
 github.com/iancoleman/orderedmap v0.3.0/go.mod h1:XuLcCUkdL5owUCQeF2Ue9uuw1EptkJDkXXS7VoV7XGE=
-github.com/iotaledger/hive.go/codegen v0.0.0-20231005142627-86973b2edb3b h1:RpCqfmmxrkTdxPm56UzF1QuHppTo3VtyzhfaUUfzVA0=
-github.com/iotaledger/hive.go/codegen v0.0.0-20231005142627-86973b2edb3b/go.mod h1:zBiQaY4DL7xx/gNgb1MWqMaV62x2o937nBCEaW++ztI=
 github.com/iotaledger/hive.go/constraints v0.0.0-20231005142627-86973b2edb3b h1:8FdKoB755PjCL1aHTi+2rPt9lCUS4B2wg2fNKykw5dc=
 github.com/iotaledger/hive.go/constraints v0.0.0-20231005142627-86973b2edb3b/go.mod h1:dOBOM2s4se3HcWefPe8sQLUalGXJ8yVXw58oK8jke3s=
 github.com/iotaledger/hive.go/core v1.0.0-rc.3.0.20231005142627-86973b2edb3b h1:gQ+Wqg8h/LRpgX3CsmaOZYdMIBVL4fAPIrZbmA6Wn3Q=

nodeclient/blockissuer_client.go

@@ -25,7 +25,6 @@ var (
 )
 
 type (
-
 	// BlockIssuerClient is a client which queries the optional blockissuer functionality of a node.
 	BlockIssuerClient interface {
 		// Info returns the info of the block issuer.

unlock_cond.go

@@ -199,6 +199,25 @@ func (f UnlockConditionSet) HasExpirationCondition() bool {
 	return f.Expiration() != nil
 }
 
+// CheckExpirationCondition returns the expiration return ident in case an expiration condition was set and
+// the future bound slot is greater than the expiration slot.
+// In case the past bound slot is smaller than the expiration slot, "nil" is returned to indicate that the original owner can unlock the output.
+// The range in between is not unlockable by anyone and an "ErrExpirationConditionUnlockFailed" error will be returned.
+func (f UnlockConditionSet) CheckExpirationCondition(futureBoundedSlotIndex, pastBoundedSlotIndex SlotIndex) (Address, error) {
+	if f.HasExpirationCondition() {
+		if ok, returnIdent := f.ReturnIdentCanUnlock(futureBoundedSlotIndex); ok {
+			return returnIdent, nil
+		}
+
+		if !f.OwnerIdentCanUnlock(pastBoundedSlotIndex) {
+			return nil, ErrExpirationConditionUnlockFailed
+		}
+	}
+
+	//nolint:nilnil // nil, nil is ok in this context, even if it is not go idiomatic
+	return nil, nil
+}
+
 // HasTimelockCondition tells whether this set has a TimelockUnlockCondition.
 func (f UnlockConditionSet) HasTimelockCondition() bool {
 	return f.Timelock() != nil