feat(x/ecocredit)!: support rolling date windows (#744)

* feat(x/ecocredit)!: support rolling date windows

* update types.proto

* Update proto/regen/ecocredit/basket/v1/state.proto

Co-authored-by: Ryan Christoffersen <12519942+ryanchristo@users.noreply.github.com>

* Update proto/regen/ecocredit/basket/v1/tx.proto

Co-authored-by: Ryan Christoffersen <12519942+ryanchristo@users.noreply.github.com>

* chore: proto-gen

Co-authored-by: Ryan Christoffersen <12519942+ryanchristo@users.noreply.github.com>
Co-authored-by: technicallyty <48813565+tytech3@users.noreply.github.com>

proto/regen/ecocredit/basket/v1/state.proto

@@ -4,6 +4,7 @@ package regen.ecocredit.basket.v1;
 
 import "cosmos/orm/v1alpha1/orm.proto";
 import "google/protobuf/timestamp.proto";
+import "regen/ecocredit/basket/v1/types.proto";
 
 option go_package = "github.com/regen-network/regen-ledger/x/ecocredit/basket";
 
@@ -28,9 +29,8 @@ message Basket {
     // credit_type_name is the name of the credit type this basket is able to hold.
     string credit_type_name = 4;
 
-    // min_start_date is the earliest start date for batches of credits allowed
-    // into the basket.
-    google.protobuf.Timestamp min_start_date = 5;
+    // date_criteria is the date criteria for batches admitted to the basket.
+    DateCriteria date_criteria = 5;
 
     // exponent is the exponent for converting credits to/from basket tokens.
     uint32 exponent = 6;

proto/regen/ecocredit/basket/v1/tx.proto

@@ -5,7 +5,6 @@ package regen.ecocredit.basket.v1;
 option go_package = "github.com/regen-network/regen-ledger/x/ecocredit/basket";
 
 import "gogoproto/gogo.proto";
-import "google/protobuf/timestamp.proto";
 import "regen/ecocredit/basket/v1/types.proto";
 import "cosmos/base/v1beta1/coin.proto";
 
@@ -58,9 +57,8 @@ message MsgCreate {
   // allowed_classes are the credit classes allowed to be put in the basket
   repeated string allowed_classes = 7;
 
-  // min_start_date is the earliest start date for batches of credits allowed
-  // into the basket.
-  google.protobuf.Timestamp min_start_date = 8;
+  // date_criteria is the date criteria for batches admitted to the basket.
+  DateCriteria date_criteria = 8;
 
   // fee is the fee that the curator will pay to create the basket. It must be
   // >= the required Params.basket_creation_fee. We include the fee explicitly

proto/regen/ecocredit/basket/v1/types.proto

@@ -4,6 +4,9 @@ package regen.ecocredit.basket.v1;
 
 option go_package = "github.com/regen-network/regen-ledger/x/ecocredit/basket";
 
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/duration.proto";
+
 // BasketCredit represents the information for a credit batch inside a basket.
 message BasketCredit {
 
@@ -15,3 +18,20 @@ message BasketCredit {
   //  credit type for this batch.
   string amount = 2;
 }
+
+// DateCriteria represents a basket credit batch date criteria.
+message DateCriteria {
+
+  // sum is the oneof representing the date criteria.
+  oneof sum {
+    // min_start_date is the earliest start date for batches of credits allowed
+    // into the basket.
+    google.protobuf.Timestamp min_start_date = 1;
+
+    // start_date_window is a duration of time measured into the past which sets
+    // a cutoff for batch start dates when adding new credits to the basket.
+    // Based on the current block timestamp, credits whose start date is before
+    // `block_timestamp - batch_date_window` will not be allowed into the basket.
+    google.protobuf.Duration start_date_window = 2;
+  }
+}