feat(x/ecocredit): update batch proto to support dynamic minting

proto/regen/ecocredit/v1/state.proto

@@ -136,6 +136,14 @@ message BatchInfo {
 
   // issuance_date is the timestamp when the credit batch was issued.
   google.protobuf.Timestamp issuance_date = 7;
+
+  // issuer is an account address which created the batch and which is
+  // authorized to issue more credits if sealed=false.
+  string issuer = 8;
+
+  // locked tells if it's possible to mint new credits in the future.
+  // Once the locked is set to true, it can't be toggled any more.
+  bool locked = 9;
 }
 
 // ClassSequence is a sequence number for creating credit class identifiers for

proto/regen/ecocredit/v1/tx.proto

@@ -23,6 +23,16 @@ service Msg {
   // be distributed to recipients in either tradable or retired form.
   rpc CreateBatch(MsgCreateBatch) returns (MsgCreateBatchResponse);
 
+  // MintBatch issues new token in a given batch.
+  // The issuer must be the account who created (or delegated using x/authz),
+  // the batch.
+  // The request will fail if the batch is locked.
+  // NOTE: this method is only for bridge purpose. It must not be used
+  // for issuing native credits on Regen. More specifically, we
+  // enable minting more credits in an existing batch, when the batch
+  // represents a vintage originally registered in another chain.
+  rpc MintBatch(MsgMintBatch) returns (MsgMintBatchResponse);
+
   // Send sends tradable credits from one account to another account. Sent
   // credits can either be tradable or retired on receipt.
   rpc Send(MsgSend) returns (MsgSendResponse);
@@ -133,30 +143,34 @@ message MsgCreateBatch {
   // quantified and verified.
   google.protobuf.Timestamp end_date = 6 [ (gogoproto.stdtime) = true ];
 
-  // BatchIssuance represents the issuance of some credits in a batch to a
-  // single recipient.
-  message BatchIssuance {
+  // If unlocked is set to true, we will seal the batch and disable the
+  // future minting.
+  bool unlocked = 7;
+}
 
-    // recipient is the account of the recipient.
-    string recipient = 1;
+// BatchIssuance represents the issuance of some credits in a batch to a
+// single recipient.
+message BatchIssuance {
 
-    // tradable_amount is the number of credits in this issuance that can be
-    // traded by this recipient. Decimal values are acceptable.
-    string tradable_amount = 2;
+  // recipient is the account of the recipient.
+  string recipient = 1;
 
-    // retired_amount is the number of credits in this issuance that are
-    // effectively retired by the issuer on receipt. Decimal values are
-    // acceptable.
-    string retired_amount = 3;
+  // tradable_amount is the number of credits in this issuance that can be
+  // traded by this recipient. Decimal values are acceptable.
+  string tradable_amount = 2;
 
-    // retirement_location is the location of the beneficiary or buyer of the
-    // retired credits. This must be provided if retired_amount is positive. It
-    // is a string of the form
-    // <country-code>[-<sub-national-code>[ <postal-code>]], with the first two
-    // fields conforming to ISO 3166-2, and postal-code being up to 64
-    // alphanumeric characters.
-    string retirement_location = 4;
-  }
+  // retired_amount is the number of credits in this issuance that are
+  // effectively retired by the issuer on receipt. Decimal values are
+  // acceptable.
+  string retired_amount = 3;
+
+  // retirement_location is the location of the beneficiary or buyer of the
+  // retired credits. This must be provided if retired_amount is positive. It
+  // is a string of the form
+  // <country-code>[-<sub-national-code>[ <postal-code>]], with the first two
+  // fields conforming to ISO 3166-2, and postal-code being up to 64
+  // alphanumeric characters.
+  string retirement_location = 4;
 }
 
 // MsgCreateBatchResponse is the Msg/CreateBatch response type.
@@ -165,6 +179,39 @@ message MsgCreateBatchResponse {
   string batch_denom = 1;
 }
 
+// MsgMintBatch is a request type for MintBatch Msg RPC.
+message MsgMintBatch {
+  // Issuer must equal to the batch.issuer address.
+  // Signer of the msg.
+  string issuer = 1;
+
+  // issuance are the credits issued in the batch.
+  repeated BatchIssuance issuance = 2;
+
+  // A reference to a transaction or an event referencing the transaction
+  // which caused the transfer from other chain or registry.
+  OriginTx origin_tx = 3;
+
+  // reference note for accounting, will be passed to an event
+  string note = 4;
+
+  // If unlocked=true keeps the batch unlocked for future minting.
+  // Othrwise it will lock the batch after the mint.
+  // Will throw an error if the batch is already locked.
+  bool unlocked = 5;
+
+  message OriginTx {
+    // type of the transaction originating the mint process. Eg: Polygon,
+    // Ethereum, Verra,
+    string typ = 1;
+    // the id of a transaction based on a type (tx id, serial number)
+    string id = 2;
+  }
+}
+
+// MsgMintBatchResponse is the Msg/MintBatch response type.
+message MsgMintBatchResponse {}
+
 // MsgSend is the Msg/Send request type.
 message MsgSend {