feat: params upgrade message + new min_funding_multiple param

docs/swagger.yml

@@ -4518,6 +4518,17 @@ paths:
                     type: string
                     format: uint64
                     description: Minimum amount of tokens that can be funded per bundle.
+                  min_funding_multiple:
+                    type: string
+                    format: uint64
+                    description: >-
+                      Minimum ratio between the funded amount and the
+                      amount_per_bundle.
+
+                      In other words this param ensures, that a funder provides
+                      at least funding for
+
+                      `min_funding_multiple` bundles.
             description: QueryParamsResponse ...
         default:
           description: An unexpected error response.

proto/kyve/funders/v1beta1/events.proto

@@ -2,11 +2,22 @@ syntax = "proto3";
 
 package kyve.funders.v1beta1;
 
-//import "gogoproto/gogo.proto";
-//import "kyve/funders/v1beta1/params.proto";
+import "gogoproto/gogo.proto";
+import "kyve/funders/v1beta1/params.proto";
 
 option go_package = "github.com/KYVENetwork/chain/x/funders/types";
 
+// EventUpdateParams is an event emitted when the module parameters are updated.
+// emitted_by: MsgUpdateParams
+message EventUpdateParams {
+  // old_params is the module's old parameters.
+  Params old_params = 1 [(gogoproto.nullable) = false];
+  // new_params is the module's new parameters.
+  Params new_params = 2 [(gogoproto.nullable) = false];
+  // payload is the parameter updates that were performed.
+  string payload = 3;
+}
+
 // EventCreateFunder is an event emitted when a funder is created.
 // emitted_by: MsgCreateFunder
 message EventCreateFunder {

proto/kyve/funders/v1beta1/params.proto

@@ -10,4 +10,8 @@ message Params {
   uint64 min_funding_amount = 1;
   // Minimum amount of tokens that can be funded per bundle.
   uint64 min_funding_amount_per_bundle = 2;
+  // Minimum ratio between the funded amount and the amount_per_bundle.
+  // In other words this param ensures, that a funder provides at least funding for
+  // `min_funding_multiple` bundles.
+  uint64 min_funding_multiple = 3;
 }

proto/kyve/funders/v1beta1/tx.proto

@@ -2,6 +2,8 @@ syntax = "proto3";
 
 package kyve.funders.v1beta1;
 
+import "cosmos_proto/cosmos.proto";
+
 option go_package = "github.com/KYVENetwork/chain/x/funders/types";
 
 // Msg defines the Msg service.
@@ -14,6 +16,10 @@ service Msg {
   rpc FundPool(MsgFundPool) returns (MsgFundPoolResponse);
   // DefundPool ...
   rpc DefundPool(MsgDefundPool) returns (MsgDefundPoolResponse);
+
+  // UpdateParams defines a governance operation for updating the x/delegation module
+  // parameters. The authority is hard-coded to the x/gov module account.
+  rpc UpdateParams(MsgUpdateParams) returns (MsgUpdateParamsResponse);
 }
 
 // MsgCreateFunder defines a SDK message for creating a funder.
@@ -81,3 +87,15 @@ message MsgDefundPool {
 
 // MsgDefundPoolResponse defines the Msg/DefundPool response type.
 message MsgDefundPoolResponse {}
+
+// MsgUpdateParams defines a SDK message for updating the module parameters.
+message MsgUpdateParams {
+  // authority is the address of the governance account.
+  string authority = 1 [(cosmos_proto.scalar) = "cosmos.AddressString"];
+
+  // payload defines the x/delegation parameters to update.
+  string payload = 2;
+}
+
+// MsgUpdateParamsResponse defines the Msg/UpdateParams response type.
+message MsgUpdateParamsResponse {}

x/funders/keeper/msg_server_update_params.go

@@ -0,0 +1,35 @@
+package keeper
+
+import (
+	"context"
+	"encoding/json"
+
+	"cosmossdk.io/errors"
+	sdk "github.com/cosmos/cosmos-sdk/types"
+
+	// Delegation
+	"github.com/KYVENetwork/chain/x/funders/types"
+	// Gov
+	govTypes "github.com/cosmos/cosmos-sdk/x/gov/types"
+)
+
+func (k msgServer) UpdateParams(goCtx context.Context, msg *types.MsgUpdateParams) (*types.MsgUpdateParamsResponse, error) {
+	if k.authority != msg.Authority {
+		return nil, errors.Wrapf(govTypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.authority, msg.Authority)
+	}
+
+	ctx := sdk.UnwrapSDKContext(goCtx)
+	oldParams := k.GetParams(ctx)
+
+	newParams := oldParams
+	_ = json.Unmarshal([]byte(msg.Payload), &newParams)
+	k.SetParams(ctx, newParams)
+
+	_ = ctx.EventManager().EmitTypedEvent(&types.EventUpdateParams{
+		OldParams: oldParams,
+		NewParams: newParams,
+		Payload:   msg.Payload,
+	})
+
+	return &types.MsgUpdateParamsResponse{}, nil
+}