feat: ecocredit direct buy/sell proto definitions (#560)

* feat: credit store proto definition

* fix proto file

* change CancelSellOrder to UpdatedSellOrder and add AllowAskDenom

* update comments

* updates

* add bid price

* Update proto/regen/ecocredit/v1alpha1/tx.proto

Co-authored-by: Marie Gauthier <marie.gauthier63@gmail.com>

* rename dont_auto_retire to disable_auto_retire

* Update proto/regen/ecocredit/v1alpha1/tx.proto

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

Co-authored-by: Marie Gauthier <marie.gauthier63@gmail.com>
Co-authored-by: Ryan Christoffersen <12519942+ryanchristo@users.noreply.github.com>

proto/regen/ecocredit/v1alpha1/tx.proto

@@ -4,6 +4,7 @@ package regen.ecocredit.v1alpha1;
 
 import "gogoproto/gogo.proto";
 import "google/protobuf/timestamp.proto";
+import "cosmos/base/v1beta1/coin.proto";
 
 option go_package = "github.com/regen-network/regen-ledger/x/ecocredit";
 
@@ -39,6 +40,18 @@ service Msg {
 
   // UpdateClassMetadata updates the credit class metadata
   rpc UpdateClassMetadata(MsgUpdateClassMetadata) returns (MsgUpdateClassMetadataResponse);
+
+  // Sell creates new sell orders.
+  rpc Sell(MsgSell) returns (MsgSellResponse);
+
+  // UpdateSellOrders updates existing sell orders.
+  rpc UpdateSellOrders(MsgUpdateSellOrders) returns (MsgUpdateSellOrdersResponse);
+
+  // BuyDirect creates buy orders directly against sell orders.
+  rpc BuyDirect (MsgBuyDirect) returns (MsgBuyDirectResponse);
+
+  // AllowAskDenom is a governance operation which authorizes a new ask denom to be used in sell orders
+  rpc AllowAskDenom (MsgAllowAskDenom) returns (MsgAllowAskDenomResponse);
 }
 
 // MsgCreateClass is the Msg/CreateClass request type.
@@ -274,4 +287,143 @@ message MsgUpdateClassMetadata {
 }
 
 // MsgUpdateClassMetadataResponse is the MsgUpdateClassMetadata response type.
-message MsgUpdateClassMetadataResponse {}
+message MsgUpdateClassMetadataResponse {}
+
+// MsgSell is the Msg/Sell request type.
+message MsgSell {
+
+  // owner is the address of the owner of the credits being sold.
+  string owner = 1;
+
+  // orders are the sell orders being created.
+  repeated Order orders = 2;
+
+  // Order is the content of a new sell order.
+  message Order {
+
+    // batch_denom is the credit batch being sold.
+    string batch_denom = 1;
+
+    // quantity is the quantity of credits being sold from this batch. If it is
+    // less then the balance of credits the owner has available at the time this
+    // sell order is matched, the quantity will be adjusted downwards to the
+    // owner's balance. However, if the balance of credits is less than this
+    // quantity at the time the sell order is created, the operation will fail.
+    string quantity = 2;
+
+    // ask_price is the price the seller is asking for each unit of the
+    // batch_denom. Each credit unit of the batch will be sold for at least the
+    // ask_price or more.
+    cosmos.base.v1beta1.Coin ask_price = 3;
+
+    // disable_auto_retire disables auto-retirement of credits which allows a
+    // buyer to disable auto-retirement in their buy order enabling them to
+    // resell the credits to another buyer.
+    bool disable_auto_retire = 4;
+  }
+}
+
+// MsgSellResponse is the Msg/Sell response type.
+message MsgSellResponse {
+
+  // sell_order_ids are the sell order IDs of the newly created sell orders.
+  repeated uint64 sell_order_ids = 1;
+}
+
+// MsgUpdateSellOrders is the Msg/UpdateSellOrders request type.
+message MsgUpdateSellOrders {
+
+  // owner is the owner of the sell orders.
+  string owner = 1;
+
+  // updates are updates to existing sell orders.
+  repeated Update updates = 2;
+
+  // Update is an update to an existing sell order.
+  message Update {
+
+    //  sell_order_id is the ID of an existing sell order.
+    uint64 sell_order_id = 1;
+
+    // new_quantity is the updated quantity of credits available to sell, if it
+    // is set to zero then the order is cancelled.
+    string new_quantity = 2;
+
+    // new_ask_price is the new ask price for this sell order
+    cosmos.base.v1beta1.Coin new_ask_price = 3;
+
+    // disable_auto_retire updates the disable_auto_retire field in the sell order.
+    bool disable_auto_retire = 4;
+  }
+}
+
+// MsgUpdateSellOrdersResponse is the Msg/UpdateSellOrders response type.
+message MsgUpdateSellOrdersResponse {}
+
+// MsgBuyDirect is the Msg/BuyDirect request type.
+message MsgBuyDirect {
+
+  // buyer is the address of the credit buyer.
+  string buyer = 1;
+
+  // orders are the new buy orders.
+  repeated Order orders = 2;
+
+  // Order is a direct buy order.
+  message Order {
+
+    // sell_order_id is the sell order ID against which the buyer is trying to buy.
+    uint64 sell_order_id = 1;
+
+    // quantity is the quantity of credits to buy. If the quantity of credits
+    // available is less than this amount the order will be partially filled
+    // unless disable_partial_fill is true.
+    string quantity = 2;
+
+    // bid price is the bid price for this buy order. A credit unit will be
+    // settled at a purchase price that is no more than the bid price. The
+    // buy order will fail if the buyer does not have enough funds available
+    // to complete the purchase.
+    cosmos.base.v1beta1.Coin bid_price = 3;
+
+    // disable_auto_retire allows auto-retirement to be disabled. If it is set to true
+    // the credits will not auto-retire and can be resold assuming that the
+    // corresponding sell order has auto-retirement disabled. If the sell order
+    // hasn't disabled auto-retirement and the buy order tries to disable it,
+    // that buy order will fail.
+    bool disable_auto_retire = 4;
+
+    // disable_partial_fill disables the default behavior of partially filling
+    // buy orders if the requested quantity is not available.
+    bool disable_partial_fill = 5;
+  }
+}
+
+// MsgBuyDirectResponse is the Msg/BuyDirect response type.
+message MsgBuyDirectResponse {
+
+  // buy_order_ids are the buy order IDs of the newly created buy orders. Buy
+  // orders may not settle instantaneously, but rather in batches at specified
+  // batch epoch times.
+  repeated uint64 buy_order_ids = 1;
+}
+
+
+// MsgAllowAskDenom is the Msg/AllowAskDenom request type.
+message MsgAllowAskDenom {
+  // root_address is the address of the governance account which can authorize ask denoms
+  string root_address = 1;
+
+  // denom is the denom to allow (ex. ibc/GLKHDSG423SGS)
+  string denom = 2;
+
+  // display_denom is the denom to display to the user and is informational
+  string display_denom = 3;
+
+  // exponent is the exponent that relates the denom to the display_denom and is
+  // informational
+  uint32 exponent = 4;
+}
+
+// MsgAllowAskDenomResponse is the Msg/AllowAskDenom response type.
+message MsgAllowAskDenomResponse {}