From a735de4adf49cd221636d03968effdfe196db7fc Mon Sep 17 00:00:00 2001
From: MiniFrenchBread <103425574+MiniFrenchBread@users.noreply.github.com>
Date: Tue, 13 Aug 2024 17:01:10 +0800
Subject: [PATCH] feat: add params event

---
 x/dasigners/v1/keeper/keeper.go          | 16 +++++++++++++++-
 x/dasigners/v1/keeper/msg_server_test.go | 16 ++++++++++++++++
 x/dasigners/v1/types/events.go           | 15 +++++++++++----
 3 files changed, 42 insertions(+), 5 deletions(-)

diff --git a/x/dasigners/v1/keeper/keeper.go b/x/dasigners/v1/keeper/keeper.go
index 047d1813..fd0e63b9 100644
--- a/x/dasigners/v1/keeper/keeper.go
+++ b/x/dasigners/v1/keeper/keeper.go
@@ -2,18 +2,21 @@ package keeper
 
 import (
 	"encoding/hex"
+	"fmt"
 	"math/big"
 
 	"cosmossdk.io/math"
 	"github.com/cometbft/cometbft/libs/log"
 	"github.com/cosmos/cosmos-sdk/codec"
 	"github.com/cosmos/cosmos-sdk/store/prefix"
+
 	storetypes "github.com/cosmos/cosmos-sdk/store/types"
+
 	sdk "github.com/cosmos/cosmos-sdk/types"
-	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
 
 	"github.com/0glabs/0g-chain/chaincfg"
 	"github.com/0glabs/0g-chain/x/dasigners/v1/types"
+	stakingtypes "github.com/cosmos/cosmos-sdk/x/staking/types"
 )
 
 var BondedConversionRate = math.NewIntFromBigInt(big.NewInt(0).Exp(big.NewInt(10), big.NewInt(chaincfg.GasDenomUnit), nil))
@@ -57,6 +60,17 @@ func (k Keeper) SetParams(ctx sdk.Context, params types.Params) {
 	store := ctx.KVStore(k.storeKey)
 	bz := k.cdc.MustMarshal(&params)
 	store.Set(types.ParamsKey, bz)
+
+	ctx.EventManager().EmitEvent(
+		sdk.NewEvent(
+			types.EventTypeUpdateParams,
+			sdk.NewAttribute(types.AttributeKeyBlockHeight, fmt.Sprint(ctx.BlockHeader().Height)),
+			sdk.NewAttribute(types.AttributeKeyTokensPerVote, fmt.Sprint(params.TokensPerVote)),
+			sdk.NewAttribute(types.AttributeKeyMaxQuorums, fmt.Sprint(params.MaxQuorums)),
+			sdk.NewAttribute(types.AttributeKeyEpochBlocks, fmt.Sprint(params.EpochBlocks)),
+			sdk.NewAttribute(types.AttributeKeyEncodedSlices, fmt.Sprint(params.EncodedSlices)),
+		),
+	)
 }
 
 func (k Keeper) GetEpochNumber(ctx sdk.Context) (uint64, error) {
diff --git a/x/dasigners/v1/keeper/msg_server_test.go b/x/dasigners/v1/keeper/msg_server_test.go
index d6934ba6..6223620f 100644
--- a/x/dasigners/v1/keeper/msg_server_test.go
+++ b/x/dasigners/v1/keeper/msg_server_test.go
@@ -1,10 +1,12 @@
 package keeper_test
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/0glabs/0g-chain/x/dasigners/v1/testutil"
 	"github.com/0glabs/0g-chain/x/dasigners/v1/types"
+	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/stretchr/testify/suite"
 )
 
@@ -53,6 +55,7 @@ func (suite *MsgServerTestSuite) TestChangeParams() {
 	}
 	for _, tc := range testCases {
 		suite.Run(tc.name, func() {
+			oldEventNum := len(suite.Ctx.EventManager().Events())
 			_, err := suite.Keeper.ChangeParams(suite.Ctx, tc.req)
 			if tc.expectErr {
 				suite.Require().Error(err)
@@ -61,6 +64,19 @@ func (suite *MsgServerTestSuite) TestChangeParams() {
 				suite.Require().NoError(err)
 				params := suite.Keeper.GetParams(suite.Ctx)
 				suite.Require().EqualValues(*tc.req.Params, params)
+				suite.Assert().NoError(err)
+
+				events := suite.Ctx.EventManager().Events()
+				suite.Assert().EqualValues(len(events), oldEventNum+1)
+				suite.Assert().EqualValues(events[len(events)-1], sdk.NewEvent(
+					types.EventTypeUpdateParams,
+					sdk.NewAttribute(types.AttributeKeyBlockHeight, fmt.Sprint(suite.Ctx.BlockHeader().Height)),
+					sdk.NewAttribute(types.AttributeKeyTokensPerVote, fmt.Sprint(params.TokensPerVote)),
+					sdk.NewAttribute(types.AttributeKeyMaxQuorums, fmt.Sprint(params.MaxQuorums)),
+					sdk.NewAttribute(types.AttributeKeyEpochBlocks, fmt.Sprint(params.EpochBlocks)),
+					sdk.NewAttribute(types.AttributeKeyEncodedSlices, fmt.Sprint(params.EncodedSlices)),
+				),
+				)
 			}
 		})
 	}
diff --git a/x/dasigners/v1/types/events.go b/x/dasigners/v1/types/events.go
index 00927dae..6ffb4d71 100644
--- a/x/dasigners/v1/types/events.go
+++ b/x/dasigners/v1/types/events.go
@@ -3,9 +3,16 @@ package types
 // Module event types
 const (
 	EventTypeUpdateSigner = "update_signer"
+	EventTypeUpdateParams = "update_params"
 
-	AttributeKeySigner      = "signer"
-	AttributeKeySocket      = "socket"
-	AttributeKeyPublicKeyG1 = "pubkey_g1"
-	AttributeKeyPublicKeyG2 = "pubkey_g2"
+	AttributeKeySigner            = "signer"
+	AttributeKeySocket            = "socket"
+	AttributeKeyPublicKeyG1       = "pubkey_g1"
+	AttributeKeyPublicKeyG2       = "pubkey_g2"
+	AttributeKeyBlockHeight       = "block_height"
+	AttributeKeyTokensPerVote     = "tokens_per_vote"
+	AttributeKeyMaxVotesPerSigner = "max_votes_per_signer"
+	AttributeKeyMaxQuorums        = "max_quorums"
+	AttributeKeyEpochBlocks       = "epoch_blocks"
+	AttributeKeyEncodedSlices     = "encoded_slices"
 )