From 7af9e9d496c67e5eede9f0bf8d7943c478e93c87 Mon Sep 17 00:00:00 2001
From: Prathamesh Musale <prathamesh.musale0@gmail.com>
Date: Wed, 14 May 2025 06:24:55 +0000
Subject: [PATCH] Add evidence module (#71)

Part of https://www.notion.so/Add-evidence-module-for-double-signing-slashing-1f2a6b22d472805b8609e2122c5b0328

Reviewed-on: https://git.vdb.to/cerc-io/laconicd/pulls/71
Co-authored-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
Co-committed-by: Prathamesh Musale <prathamesh.musale0@gmail.com>
---
 app/app.go   | 4 ++++
 app/app.yaml | 7 +++++--
 go.mod       | 1 +
 go.sum       | 2 ++
 4 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/app/app.go b/app/app.go
index 08d39552..8669716c 100644
--- a/app/app.go
+++ b/app/app.go
@@ -12,6 +12,7 @@ import (
 	"cosmossdk.io/depinject"
 	"cosmossdk.io/log"
 	storetypes "cosmossdk.io/store/types"
+	evidencekeeper "cosmossdk.io/x/evidence/keeper"
 
 	auctionkeeper "git.vdb.to/cerc-io/laconicd/x/auction/keeper"
 	bondkeeper "git.vdb.to/cerc-io/laconicd/x/bond/keeper"
@@ -44,6 +45,7 @@ import (
 	stakingkeeper "github.com/cosmos/cosmos-sdk/x/staking/keeper"
 
 	_ "cosmossdk.io/api/cosmos/tx/config/v1"            // import for side-effects
+	_ "cosmossdk.io/x/evidence"                         // import for side-effects
 	_ "git.vdb.to/cerc-io/laconicd/x/auction/module"    // import for side-effects
 	_ "git.vdb.to/cerc-io/laconicd/x/bond/module"       // import for side-effects
 	_ "git.vdb.to/cerc-io/laconicd/x/onboarding/module" // import for side-effects
@@ -89,6 +91,7 @@ type LaconicApp struct {
 	GovKeeper             *govkeeper.Keeper
 	CrisisKeeper          *crisiskeeper.Keeper
 	ConsensusParamsKeeper consensuskeeper.Keeper
+	EvidenceKeeper        evidencekeeper.Keeper
 
 	// laconic keepers
 	AuctionKeeper    *auctionkeeper.Keeper // (Use * as per ProvideModule implementation)
@@ -162,6 +165,7 @@ func NewLaconicApp(
 		&app.GovKeeper,
 		&app.CrisisKeeper,
 		&app.ConsensusParamsKeeper,
+		&app.EvidenceKeeper,
 		&app.AuctionKeeper,
 		&app.BondKeeper,
 		&app.RegistryKeeper,
diff --git a/app/app.yaml b/app/app.yaml
index 75fae7f0..78b27298 100644
--- a/app/app.yaml
+++ b/app/app.yaml
@@ -6,11 +6,11 @@ modules:
       # During begin block slashing happens after distr.BeginBlocker so that
       # there is nothing left over in the validator fee pool, so as to keep the CanWithdrawInvariant invariant.
       # NOTE: staking module is required if HistoricalEntries param > 0
-      begin_blockers: [distribution, slashing, staking]
+      begin_blockers: [distribution, slashing, evidence, staking]
       end_blockers: [crisis, gov, staking, auction, registry]
       # NOTE: The genutils module must occur after staking so that pools are properly initialized with tokens from genesis accounts.
       # NOTE: The genutils module must also occur after auth so that it can access the params from auth.
-      init_genesis: [auth, bank, distribution, staking, slashing, gov, crisis, genutil, auction, bond, registry, onboarding]
+      init_genesis: [auth, bank, distribution, staking, slashing, gov, crisis, genutil, evidence, auction, bond, registry, onboarding]
       override_store_keys:
         - module_name: auth
           kv_store_key: acc
@@ -62,6 +62,9 @@ modules:
   - name: crisis
     config:
       "@type": cosmos.crisis.module.v1.Module
+  - name: evidence
+    config:
+      "@type": cosmos.evidence.module.v1.Module
   - name: bond
     config:
       "@type": cerc.bond.module.v1.Module
diff --git a/go.mod b/go.mod
index 37664171..d1c5352d 100644
--- a/go.mod
+++ b/go.mod
@@ -23,6 +23,7 @@ require (
 	cosmossdk.io/math v1.3.0
 	cosmossdk.io/store v1.1.1
 	cosmossdk.io/tools/confix v0.1.0
+	cosmossdk.io/x/evidence v0.1.1
 	github.com/99designs/gqlgen v0.17.22
 	github.com/cometbft/cometbft v0.38.12
 	github.com/cosmos/cosmos-db v1.0.2
diff --git a/go.sum b/go.sum
index f21bdf80..a572e5a6 100644
--- a/go.sum
+++ b/go.sum
@@ -20,6 +20,8 @@ cosmossdk.io/store v1.1.1 h1:NA3PioJtWDVU7cHHeyvdva5J/ggyLDkyH0hGHl2804Y=
 cosmossdk.io/store v1.1.1/go.mod h1:8DwVTz83/2PSI366FERGbWSH7hL6sB7HbYp8bqksNwM=
 cosmossdk.io/tools/confix v0.1.0 h1:2OOZTtQsDT5e7P3FM5xqM0bPfluAxZlAwxqaDmYBE+E=
 cosmossdk.io/tools/confix v0.1.0/go.mod h1:TdXKVYs4gEayav5wM+JHT+kTU2J7fozFNqoVaN+8CdY=
+cosmossdk.io/x/evidence v0.1.1 h1:Ks+BLTa3uftFpElLTDp9L76t2b58htjVbSZ86aoK/E4=
+cosmossdk.io/x/evidence v0.1.1/go.mod h1:OoDsWlbtuyqS70LY51aX8FBTvguQqvFrt78qL7UzeNc=
 cosmossdk.io/x/tx v0.13.5 h1:FdnU+MdmFWn1pTsbfU0OCf2u6mJ8cqc1H4OMG418MLw=
 cosmossdk.io/x/tx v0.13.5/go.mod h1:V6DImnwJMTq5qFjeGWpXNiT/fjgE4HtmclRmTqRVM3w=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=