Fund Community Pool -- Part II

simapp/params/weights.go

@@ -7,6 +7,7 @@ const (
 	DefaultWeightMsgSetWithdrawAddress          int = 50
 	DefaultWeightMsgWithdrawDelegationReward    int = 50
 	DefaultWeightMsgWithdrawValidatorCommission int = 50
+	DefaultWeightMsgFundCommunityPool           int = 50
 	DefaultWeightMsgDeposit                     int = 100
 	DefaultWeightMsgVote                        int = 67
 	DefaultWeightMsgUnjail                      int = 100

x/distribution/alias.go

@@ -37,6 +37,7 @@ const (
 	ParamBaseProposerReward          = types.ParamBaseProposerReward
 	ParamBonusProposerReward         = types.ParamBonusProposerReward
 	ParamWithdrawAddrEnabled         = types.ParamWithdrawAddrEnabled
+	TypeMsgFundCommunityPool         = types.TypeMsgFundCommunityPool
 )
 
 var (
@@ -90,6 +91,7 @@ var (
 	NewMsgSetWithdrawAddress                   = types.NewMsgSetWithdrawAddress
 	NewMsgWithdrawDelegatorReward              = types.NewMsgWithdrawDelegatorReward
 	NewMsgWithdrawValidatorCommission          = types.NewMsgWithdrawValidatorCommission
+	MsgFundCommunityPool                       = types.NewMsgFundCommunityPool
 	NewCommunityPoolSpendProposal              = types.NewCommunityPoolSpendProposal
 	NewQueryValidatorOutstandingRewardsParams  = types.NewQueryValidatorOutstandingRewardsParams
 	NewQueryValidatorCommissionParams          = types.NewQueryValidatorCommissionParams

x/distribution/client/cli/tx.go

@@ -261,12 +261,13 @@ Where proposal.json contains:
 	return cmd
 }
 
-// command to fund the community pool
+// GetCmdFundCommunityPool returns a command implementation that supports directly
+// funding the community pool.
 func GetCmdFundCommunityPool(cdc *codec.Codec) *cobra.Command {
 	return &cobra.Command{
 		Use:   "fund-community-pool [amount]",
 		Args:  cobra.ExactArgs(1),
-		Short: "funds the community pool with the specified amount",
+		Short: "Funds the community pool with the specified amount",
 		Long: strings.TrimSpace(
 			fmt.Sprintf(`Funds the community pool with the specified amount
 
@@ -287,7 +288,11 @@ $ %s tx fund-community-pool 100uatom --from mykey
 				return err
 			}
 
-			msg := types.NewMsgDepositIntoCommunityPool(amount, depositorAddr)
+			msg := types.NewMsgFundCommunityPool(amount, depositorAddr)
+			if err := msg.ValidateBasic(); err != nil {
+				return err
+			}
+
 			return utils.GenerateOrBroadcastMsgs(cliCtx, txBldr, []sdk.Msg{msg})
 		},
 	}

x/distribution/client/rest/tx.go

@@ -188,7 +188,6 @@ func withdrawValidatorRewardsHandlerFn(cliCtx context.CLIContext) http.HandlerFu
 	}
 }
 
-// Fund the community pool
 func fundCommunityPoolHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		var req fundCommunityPoolReq
@@ -207,7 +206,12 @@ func fundCommunityPoolHandlerFn(cliCtx context.CLIContext) http.HandlerFunc {
 			return
 		}
 
-		msg := types.NewMsgDepositIntoCommunityPool(req.Amount, fromAddr)
+		msg := types.NewMsgFundCommunityPool(req.Amount, fromAddr)
+		if err := msg.ValidateBasic(); err != nil {
+			rest.WriteErrorResponse(w, http.StatusBadRequest, err.Error())
+			return
+		}
+
 		utils.WriteGenerateStdTxResponse(w, cliCtx, req.BaseReq, []sdk.Msg{msg})
 	}
 }

x/distribution/handler.go

@@ -23,8 +23,8 @@ func NewHandler(k keeper.Keeper) sdk.Handler {
 		case types.MsgWithdrawValidatorCommission:
 			return handleMsgWithdrawValidatorCommission(ctx, msg, k)
 
-		case types.MsgDepositIntoCommunityPool:
-			return handleMsgDepositIntoCommunityPool(ctx, msg, k)
+		case types.MsgFundCommunityPool:
+			return handleMsgFundCommunityPool(ctx, msg, k)
 
 		default:
 			errMsg := fmt.Sprintf("unrecognized distribution message type: %T", msg)
@@ -86,8 +86,8 @@ func handleMsgWithdrawValidatorCommission(ctx sdk.Context, msg types.MsgWithdraw
 	return sdk.Result{Events: ctx.EventManager().Events()}
 }
 
-func handleMsgDepositIntoCommunityPool(ctx sdk.Context, msg types.MsgDepositIntoCommunityPool, k keeper.Keeper) sdk.Result {
-	if err := k.DepositCommunityPoolFunds(ctx, msg.Amount, msg.Depositor); err != nil {
+func handleMsgFundCommunityPool(ctx sdk.Context, msg types.MsgFundCommunityPool, k keeper.Keeper) sdk.Result {
+	if err := k.FundCommunityPool(ctx, msg.Amount, msg.Depositor); err != nil {
 		return sdk.ResultFromError(err)
 	}
 

x/distribution/keeper/keeper.go

@@ -150,8 +150,11 @@ func (k Keeper) GetTotalRewards(ctx sdk.Context) (totalRewards sdk.DecCoins) {
 	return totalRewards
 }
 
-// DepositCommunityPoolFunds allows to transfer the specified amount from the sender into the community pool
-func (k Keeper) DepositCommunityPoolFunds(ctx sdk.Context, amount sdk.Coins, sender sdk.AccAddress) error {
+// FundCommunityPool allows an account to directly fund the community fund pool.
+// The amount is first added to the distribution module account and then directly
+// added to the pool. An error is returned if the amount cannot be sent to the
+// module account.
+func (k Keeper) FundCommunityPool(ctx sdk.Context, amount sdk.Coins, sender sdk.AccAddress) error {
 	if err := k.supplyKeeper.SendCoinsFromAccountToModule(ctx, sender, types.ModuleName, amount); err != nil {
 		return err
 	}

x/distribution/simulation/operations.go

@@ -21,6 +21,7 @@ const (
 	OpWeightMsgSetWithdrawAddress          = "op_weight_msg_set_withdraw_address"
 	OpWeightMsgWithdrawDelegationReward    = "op_weight_msg_withdraw_delegation_reward"
 	OpWeightMsgWithdrawValidatorCommission = "op_weight_msg_withdraw_validator_commission"
+	OpWeightMsgFundCommunityPool           = "op_weight_msg_fund_community_pool"
 )
 
 // WeightedOperations returns all the operations from the module with their respective weights
@@ -50,6 +51,13 @@ func WeightedOperations(
 		},
 	)
 
+	var weightMsgFundCommunityPool int
+	appParams.GetOrGenerate(cdc, OpWeightMsgFundCommunityPool, &weightMsgFundCommunityPool, nil,
+		func(_ *rand.Rand) {
+			weightMsgFundCommunityPool = simappparams.DefaultWeightMsgFundCommunityPool
+		},
+	)
+
 	return simulation.WeightedOperations{
 		simulation.NewWeightedOperation(
 			weightMsgSetWithdrawAddress,
@@ -63,6 +71,10 @@ func WeightedOperations(
 			weightMsgWithdrawValidatorCommission,
 			SimulateMsgWithdrawValidatorCommission(ak, k, sk),
 		),
+		simulation.NewWeightedOperation(
+			weightMsgFundCommunityPool,
+			SimulateMsgFundCommunityPool(ak, k, sk),
+		),
 	}
 }
 
@@ -197,3 +209,52 @@ func SimulateMsgWithdrawValidatorCommission(ak types.AccountKeeper, k keeper.Kee
 		return simulation.NewOperationMsg(msg, true, ""), nil, nil
 	}
 }
+
+// SimulateMsgFundCommunityPool simulates MsgFundCommunityPool execution where
+// a random account sends a random amount of its funds to the community pool.
+func SimulateMsgFundCommunityPool(ak types.AccountKeeper, k keeper.Keeper, sk stakingkeeper.Keeper) simulation.Operation {
+	return func(
+		r *rand.Rand, app *baseapp.BaseApp, ctx sdk.Context, accs []simulation.Account, chainID string,
+	) (simulation.OperationMsg, []simulation.FutureOperation, error) {
+
+		funder, _ := simulation.RandomAcc(r, accs)
+
+		account := ak.GetAccount(ctx, funder.Address)
+		coins := account.SpendableCoins(ctx.BlockTime())
+
+		fundAmount := simulation.RandSubsetCoins(r, coins)
+		if fundAmount.Empty() {
+			return simulation.NoOpMsg(types.ModuleName), nil, nil
+		}
+
+		var (
+			fees sdk.Coins
+			err  error
+		)
+
+		coins, hasNeg := coins.SafeSub(fundAmount)
+		if !hasNeg {
+			fees, err = simulation.RandomFees(r, ctx, coins)
+			if err != nil {
+				return simulation.NoOpMsg(types.ModuleName), nil, err
+			}
+		}
+
+		msg := types.NewMsgFundCommunityPool(fundAmount, funder.Address)
+		tx := helpers.GenTx(
+			[]sdk.Msg{msg},
+			fees,
+			chainID,
+			[]uint64{account.GetAccountNumber()},
+			[]uint64{account.GetSequence()},
+			funder.PrivKey,
+		)
+
+		res := app.Deliver(tx)
+		if !res.IsOK() {
+			return simulation.NoOpMsg(types.ModuleName), nil, errors.New(res.Log)
+		}
+
+		return simulation.NewOperationMsg(msg, true, ""), nil, nil
+	}
+}

x/distribution/types/msg.go

@@ -117,40 +117,51 @@ func (msg MsgWithdrawValidatorCommission) ValidateBasic() sdk.Error {
 	return nil
 }
 
-// msg struct for delegation withdraw from a single validator
-type MsgDepositIntoCommunityPool struct {
+const TypeMsgFundCommunityPool = "fund_community_pool"
+
+// MsgFundCommunityPool defines a Msg type that allows an account to directly
+// fund the community pool.
+type MsgFundCommunityPool struct {
 	Amount    sdk.Coins      `json:"amount" yaml:"amount"`
 	Depositor sdk.AccAddress `json:"depositor" yaml:"depositor"`
 }
 
-func NewMsgDepositIntoCommunityPool(amount sdk.Coins, depositor sdk.AccAddress) MsgDepositIntoCommunityPool {
-	return MsgDepositIntoCommunityPool{
+// NewMsgFundCommunityPool returns a new MsgFundCommunityPool with a sender and
+// a funding amount.
+func NewMsgFundCommunityPool(amount sdk.Coins, depositor sdk.AccAddress) MsgFundCommunityPool {
+	return MsgFundCommunityPool{
 		Amount:    amount,
 		Depositor: depositor,
 	}
 }
 
-func (msg MsgDepositIntoCommunityPool) Route() string { return ModuleName }
-func (msg MsgDepositIntoCommunityPool) Type() string  { return "deposit_into_community_pool" }
+// Route returns the MsgFundCommunityPool message route.
+func (msg MsgFundCommunityPool) Route() string { return ModuleName }
 
-// Return address that must sign over msg.GetSignBytes()
-func (msg MsgDepositIntoCommunityPool) GetSigners() []sdk.AccAddress {
+// Type returns the MsgFundCommunityPool message type.
+func (msg MsgFundCommunityPool) Type() string { return TypeMsgFundCommunityPool }
+
+// GetSigners returns the signer addresses that are expected to sign the result
+// of GetSignBytes.
+func (msg MsgFundCommunityPool) GetSigners() []sdk.AccAddress {
 	return []sdk.AccAddress{msg.Depositor}
 }
 
-// get the bytes for the message signer to sign on
-func (msg MsgDepositIntoCommunityPool) GetSignBytes() []byte {
+// GetSignBytes returns the raw bytes for a MsgFundCommunityPool message that
+// the expected signer needs to sign.
+func (msg MsgFundCommunityPool) GetSignBytes() []byte {
 	bz := ModuleCdc.MustMarshalJSON(msg)
 	return sdk.MustSortJSON(bz)
 }
 
-// quick validity check
-func (msg MsgDepositIntoCommunityPool) ValidateBasic() sdk.Error {
+// ValidateBasic performs basic MsgFundCommunityPool message validation.
+func (msg MsgFundCommunityPool) ValidateBasic() sdk.Error {
 	if !msg.Amount.IsValid() {
 		return sdk.ErrInvalidCoins(msg.Amount.String())
 	}
 	if msg.Depositor.Empty() {
 		return sdk.ErrInvalidAddress(msg.Depositor.String())
 	}
+
 	return nil
 }

x/distribution/types/msg_test.go

@@ -85,7 +85,7 @@ func TestMsgDepositIntoCommunityPool(t *testing.T) {
 		{sdk.NewCoins(sdk.NewInt64Coin("uatom", 1000)), delAddr1, true},
 	}
 	for i, tc := range tests {
-		msg := NewMsgDepositIntoCommunityPool(tc.amount, tc.depositor)
+		msg := NewMsgFundCommunityPool(tc.amount, tc.depositor)
 		if tc.expectPass {
 			require.Nil(t, msg.ValidateBasic(), "test index: %v", i)
 		} else {