cosmos · sunnya97 · Feb 12, 2021 · Oct 27, 2020 · Oct 27, 2020 · Oct 28, 2020
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -72,6 +72,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+* (x/gov) [\#7733](https://github.com/cosmos/cosmos-sdk/pull/7733) ADR 037 Implementation: Governance Split Votes
 * (x/bank) [\#8302](https://github.com/cosmos/cosmos-sdk/issues/8302) Add gRPC and CLI queries for client denomination metadata.
 * (tendermint) Bump Tendermint version to [v0.34.3](https://github.com/tendermint/tendermint/releases/tag/v0.34.3).
 

diff --git a/docs/architecture/adr-037-gov-split-vote.md b/docs/architecture/adr-037-gov-split-vote.md
@@ -6,7 +6,7 @@
 
 ## Status
 
-Proposed
+Accepted
 
 ## Abstract
 
@@ -35,22 +35,22 @@ type Vote struct {
 }
 ```
 
-And for backwards compatibility, we introduce `MsgWeightedVote` while keeping `MsgVote`.
+And for backwards compatibility, we introduce `MsgVoteWeighted` while keeping `MsgVote`.
 ```
 type MsgVote struct {
   ProposalID int64
   Voter      sdk.Address
   Option     Option
 }
 
-type MsgWeightedVote struct {
+type MsgVoteWeighted struct {
   ProposalID int64
   Voter      sdk.Address
   Options    []WeightedVoteOption
 }
 ```
 
-The `ValidateBasic` of a `MsgWeightedVote` struct would require that
+The `ValidateBasic` of a `MsgVoteWeighted` struct would require that
 1. The sum of all the Rates is equal to 1.0
 2. No Option is repeated
 

diff --git a/docs/core/proto-docs.md b/docs/core/proto-docs.md
@@ -302,6 +302,7 @@
     - [TextProposal](#cosmos.gov.v1beta1.TextProposal)
     - [Vote](#cosmos.gov.v1beta1.Vote)
     - [VotingParams](#cosmos.gov.v1beta1.VotingParams)
+    - [WeightedVoteOption](#cosmos.gov.v1beta1.WeightedVoteOption)
 
     - [ProposalStatus](#cosmos.gov.v1beta1.ProposalStatus)
     - [VoteOption](#cosmos.gov.v1beta1.VoteOption)
@@ -336,6 +337,8 @@
     - [MsgSubmitProposalResponse](#cosmos.gov.v1beta1.MsgSubmitProposalResponse)
     - [MsgVote](#cosmos.gov.v1beta1.MsgVote)
     - [MsgVoteResponse](#cosmos.gov.v1beta1.MsgVoteResponse)
+    - [MsgVoteWeighted](#cosmos.gov.v1beta1.MsgVoteWeighted)
+    - [MsgVoteWeightedResponse](#cosmos.gov.v1beta1.MsgVoteWeightedResponse)
 
     - [Msg](#cosmos.gov.v1beta1.Msg)
 
@@ -4587,7 +4590,7 @@ A Vote consists of a proposal ID, the voter, and the vote option.
 | ----- | ---- | ----- | ----------- |
 | `proposal_id` | [uint64](#uint64) |  |  |
 | `voter` | [string](#string) |  |  |
-| `option` | [VoteOption](#cosmos.gov.v1beta1.VoteOption) |  |  |
+| `options` | [WeightedVoteOption](#cosmos.gov.v1beta1.WeightedVoteOption) | repeated |  |
 
 
 
@@ -4608,6 +4611,22 @@ VotingParams defines the params for voting on governance proposals.
 
 
 
+
+<a name="cosmos.gov.v1beta1.WeightedVoteOption"></a>
+
+### WeightedVoteOption
+WeightedVoteOption defines a unit of vote for vote split.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `option` | [VoteOption](#cosmos.gov.v1beta1.VoteOption) |  |  |
+| `weight` | [string](#string) |  |  |
+
+
+
+
+
  <!-- end messages -->
 
 
@@ -5065,6 +5084,33 @@ MsgVoteResponse defines the Msg/Vote response type.
 
 
 
+
+<a name="cosmos.gov.v1beta1.MsgVoteWeighted"></a>
+
+### MsgVoteWeighted
+MsgVote defines a message to cast a vote.
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `proposal_id` | [uint64](#uint64) |  |  |
+| `voter` | [string](#string) |  |  |
+| `options` | [WeightedVoteOption](#cosmos.gov.v1beta1.WeightedVoteOption) | repeated |  |
+
+
+
+
+
+
+<a name="cosmos.gov.v1beta1.MsgVoteWeightedResponse"></a>
+
+### MsgVoteWeightedResponse
+MsgVoteWeightedResponse defines the MsgVoteWeighted response type.
+
+
+
+
+
  <!-- end messages -->
 
  <!-- end enums -->
@@ -5081,6 +5127,7 @@ Msg defines the bank Msg service.
 | ----------- | ------------ | ------------- | ------------| ------- | -------- |
 | `SubmitProposal` | [MsgSubmitProposal](#cosmos.gov.v1beta1.MsgSubmitProposal) | [MsgSubmitProposalResponse](#cosmos.gov.v1beta1.MsgSubmitProposalResponse) | SubmitProposal defines a method to create new proposal given a content. | |
 | `Vote` | [MsgVote](#cosmos.gov.v1beta1.MsgVote) | [MsgVoteResponse](#cosmos.gov.v1beta1.MsgVoteResponse) | Vote defines a method to add a vote on a specific proposal. | |
+| `VoteWeighted` | [MsgVoteWeighted](#cosmos.gov.v1beta1.MsgVoteWeighted) | [MsgVoteWeightedResponse](#cosmos.gov.v1beta1.MsgVoteWeightedResponse) | WeightedVote defines a method to add a weighted vote on a specific proposal. | |
 | `Deposit` | [MsgDeposit](#cosmos.gov.v1beta1.MsgDeposit) | [MsgDepositResponse](#cosmos.gov.v1beta1.MsgDepositResponse) | Deposit defines a method to add deposit on a specific proposal. | |
 
  <!-- end services -->

diff --git a/proto/cosmos/gov/v1beta1/gov.proto b/proto/cosmos/gov/v1beta1/gov.proto
@@ -29,6 +29,16 @@ enum VoteOption {
   VOTE_OPTION_NO_WITH_VETO = 4 [(gogoproto.enumvalue_customname) = "OptionNoWithVeto"];
 }
 
+// WeightedVoteOption defines a unit of vote for vote split.
+message WeightedVoteOption {
+  VoteOption option = 1;
+  string     weight = 2 [
+    (gogoproto.customtype) = "github.com/cosmos/cosmos-sdk/types.Dec",
+    (gogoproto.nullable)   = false,
+    (gogoproto.moretags)   = "yaml:\"weight\""
+  ];
+}
+
 // TextProposal defines a standard text proposal whose changes need to be
 // manually updated in case of approval.
 message TextProposal {
@@ -119,9 +129,11 @@ message Vote {
   option (gogoproto.goproto_stringer) = false;
   option (gogoproto.equal)            = false;
 
-  uint64     proposal_id = 1 [(gogoproto.moretags) = "yaml:\"proposal_id\""];
-  string     voter       = 2;
-  VoteOption option      = 3;
+  uint64 proposal_id = 1 [(gogoproto.moretags) = "yaml:\"proposal_id\""];
+  string voter       = 2;
+  reserved 3;
+  reserved "option";
+  repeated WeightedVoteOption options = 4 [(gogoproto.nullable) = false];
 }
 
 // DepositParams defines the params for deposits on governance proposals.

diff --git a/proto/cosmos/gov/v1beta1/tx.proto b/proto/cosmos/gov/v1beta1/tx.proto
@@ -17,6 +17,9 @@ service Msg {
   // Vote defines a method to add a vote on a specific proposal.
   rpc Vote(MsgVote) returns (MsgVoteResponse);
 
+  // WeightedVote defines a method to add a weighted vote on a specific proposal.
+  rpc VoteWeighted(MsgVoteWeighted) returns (MsgVoteWeightedResponse);
+
   // Deposit defines a method to add deposit on a specific proposal.
   rpc Deposit(MsgDeposit) returns (MsgDepositResponse);
 }
@@ -55,9 +58,24 @@ message MsgVote {
   VoteOption option      = 3;
 }
 
+// MsgVote defines a message to cast a vote.
+message MsgVoteWeighted {
+  option (gogoproto.equal)            = false;
+  option (gogoproto.goproto_stringer) = false;
+  option (gogoproto.stringer)         = false;
+  option (gogoproto.goproto_getters)  = false;
+
+  uint64 proposal_id = 1 [(gogoproto.jsontag) = "proposal_id", (gogoproto.moretags) = "yaml:\"proposal_id\""];
+  string voter       = 2;
+  repeated WeightedVoteOption options = 3 [(gogoproto.nullable) = false];
+}
+
 // MsgVoteResponse defines the Msg/Vote response type.
 message MsgVoteResponse {}
 
+// MsgVoteWeightedResponse defines the MsgVoteWeighted response type.
+message MsgVoteWeightedResponse {}
+
 // MsgDeposit defines a message to submit a deposit to an existing proposal.
 message MsgDeposit {
   option (gogoproto.equal)            = false;

diff --git a/simapp/params/weights.go b/simapp/params/weights.go
@@ -10,6 +10,7 @@ const (
 	DefaultWeightMsgFundCommunityPool           int = 50
 	DefaultWeightMsgDeposit                     int = 100
 	DefaultWeightMsgVote                        int = 67
+	DefaultWeightMsgVoteWeighted                int = 33
 	DefaultWeightMsgUnjail                      int = 100
 	DefaultWeightMsgCreateValidator             int = 100
 	DefaultWeightMsgEditValidator               int = 5

diff --git a/x/gov/abci_test.go b/x/gov/abci_test.go
@@ -307,7 +307,7 @@ func TestProposalPassedEndblocker(t *testing.T) {
 	deposits := initialModuleAccCoins.Add(proposal.TotalDeposit...).Add(proposalCoins...)
 	require.True(t, moduleAccCoins.IsEqual(deposits))
 
-	err = app.GovKeeper.AddVote(ctx, proposal.ProposalId, addrs[0], types.OptionYes)
+	err = app.GovKeeper.AddVote(ctx, proposal.ProposalId, addrs[0], types.NewNonSplitVoteOption(types.OptionYes))
 	require.NoError(t, err)
 
 	newHeader := ctx.BlockHeader()
@@ -348,7 +348,7 @@ func TestEndBlockerProposalHandlerFailed(t *testing.T) {
 
 	handleAndCheck(t, gov.NewHandler(app.GovKeeper), ctx, newDepositMsg)
 
-	err = app.GovKeeper.AddVote(ctx, proposal.ProposalId, addrs[0], types.OptionYes)
+	err = app.GovKeeper.AddVote(ctx, proposal.ProposalId, addrs[0], types.NewNonSplitVoteOption(types.OptionYes))
 	require.NoError(t, err)
 
 	newHeader := ctx.BlockHeader()