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handler.go
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handler.go
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package gov
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/okex/exchain/x/common"
"github.com/okex/exchain/x/gov/keeper"
"github.com/okex/exchain/x/gov/types"
)
// NewHandler handle all "gov" type messages.
func NewHandler(keeper Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) (*sdk.Result, error) {
ctx = ctx.WithEventManager(sdk.NewEventManager())
switch msg := msg.(type) {
case MsgDeposit:
return handleMsgDeposit(ctx, keeper, msg)
case MsgSubmitProposal:
return handleMsgSubmitProposal(ctx, keeper, msg)
case MsgVote:
return handleMsgVote(ctx, keeper, msg)
default:
errMsg := fmt.Sprintf("unrecognized gov message type: %T", msg)
return sdk.ErrUnknownRequest(errMsg).Result()
}
}
}
func handleMsgSubmitProposal(ctx sdk.Context, keeper keeper.Keeper, msg MsgSubmitProposal) (*sdk.Result, error) {
err := hasOnlyDefaultBondDenom(msg.InitialDeposit)
if err != nil {
return sdk.EnvelopedErr{err}.Result()
}
// use ctx directly
if !keeper.ProposalHandlerRouter().HasRoute(msg.Content.ProposalRoute()) {
err = keeper.CheckMsgSubmitProposal(ctx, msg)
} else {
proposalHandler := keeper.ProposalHandlerRouter().GetRoute(msg.Content.ProposalRoute())
err = proposalHandler.CheckMsgSubmitProposal(ctx, msg)
}
if err != nil {
return sdk.EnvelopedErr{err}.Result()
}
proposal, err := keeper.SubmitProposal(ctx, msg.Content)
if err != nil {
return sdk.EnvelopedErr{err}.Result()
}
err = keeper.AddDeposit(ctx, proposal.ProposalID, msg.Proposer,
msg.InitialDeposit, types.EventTypeSubmitProposal)
if err != nil {
return sdk.EnvelopedErr{err}.Result()
}
ctx.EventManager().EmitEvent(
sdk.NewEvent(
sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, msg.Proposer.String()),
),
)
return &sdk.Result{
Data: keeper.Cdc().MustMarshalBinaryLengthPrefixed(proposal.ProposalID),
Events: ctx.EventManager().Events(),
}, nil
}
func handleMsgDeposit(ctx sdk.Context, keeper keeper.Keeper, msg MsgDeposit) (*sdk.Result, error) {
if err := hasOnlyDefaultBondDenom(msg.Amount); err != nil {
return sdk.EnvelopedErr{err}.Result()
}
// check depositor has sufficient coins
err := common.HasSufficientCoins(msg.Depositor, keeper.BankKeeper().GetCoins(ctx, msg.Depositor),
msg.Amount)
if err != nil {
return common.ErrInsufficientCoins(DefaultParamspace, err.Error()).Result()
}
sdkErr := keeper.AddDeposit(ctx, msg.ProposalID, msg.Depositor,
msg.Amount, types.EventTypeProposalDeposit)
if sdkErr != nil {
return sdk.EnvelopedErr{sdkErr}.Result()
}
ctx.EventManager().EmitEvent(
sdk.NewEvent(
sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, msg.Depositor.String()),
),
)
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleMsgVote(ctx sdk.Context, k keeper.Keeper, msg MsgVote) (*sdk.Result, error) {
proposal, ok := k.GetProposal(ctx, msg.ProposalID)
if !ok {
return sdk.EnvelopedErr{types.ErrUnknownProposal(msg.ProposalID)}.Result()
}
err, _ := k.AddVote(ctx, msg.ProposalID, msg.Voter, msg.Option)
if err != nil {
return sdk.EnvelopedErr{err}.Result()
}
status, distribute, tallyResults := keeper.Tally(ctx, k, proposal, false)
// update tally results after vote every time
proposal.FinalTallyResult = tallyResults
// this vote makes the votingPeriod end
if status != StatusVotingPeriod {
handleProposalAfterTally(ctx, k, &proposal, distribute, status)
k.RemoveFromActiveProposalQueue(ctx, proposal.ProposalID, proposal.VotingEndTime)
proposal.VotingEndTime = ctx.BlockHeader().Time
k.DeleteVotes(ctx, proposal.ProposalID)
}
k.SetProposal(ctx, proposal)
ctx.EventManager().EmitEvent(
sdk.NewEvent(
sdk.EventTypeMessage,
sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
sdk.NewAttribute(sdk.AttributeKeySender, msg.Voter.String()),
sdk.NewAttribute(types.AttributeKeyProposalStatus, proposal.Status.String()),
),
)
return &sdk.Result{Events: ctx.EventManager().Events()}, nil
}
func handleProposalAfterTally(
ctx sdk.Context, k keeper.Keeper, proposal *types.Proposal, distribute bool, status ProposalStatus,
) (string, string) {
if distribute {
k.DistributeDeposits(ctx, proposal.ProposalID)
} else {
k.RefundDeposits(ctx, proposal.ProposalID)
}
if status == StatusPassed {
handler := k.Router().GetRoute(proposal.ProposalRoute())
cacheCtx, writeCache := ctx.CacheContext()
// The proposal handler may execute state mutating logic depending
// on the proposal content. If the handler fails, no state mutation
// is written and the error message is logged.
err := handler(cacheCtx, proposal)
if err == nil {
proposal.Status = StatusPassed
// write state to the underlying multi-store
writeCache()
return types.AttributeValueProposalPassed, "passed"
}
proposal.Status = StatusFailed
return types.AttributeValueProposalFailed, fmt.Sprintf("passed, but failed on execution: %s",
err.Error())
} else if status == StatusRejected {
if k.ProposalHandlerRouter().HasRoute(proposal.ProposalRoute()) {
k.ProposalHandlerRouter().GetRoute(proposal.ProposalRoute()).RejectedHandler(ctx, proposal.Content)
}
proposal.Status = StatusRejected
return types.AttributeValueProposalRejected, "rejected"
}
return "", ""
}
func hasOnlyDefaultBondDenom(decCoins sdk.SysCoins) sdk.Error {
if len(decCoins) != 1 || decCoins[0].Denom != sdk.DefaultBondDenom || !decCoins.IsValid() {
return types.ErrInvalidCoins()
}
return nil
}