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msg_server.go
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msg_server.go
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package keeper
import (
"context"
"fmt"
"strconv"
"cosmossdk.io/errors"
"github.com/duality-labs/duality/x/incentives/types"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
)
var _ types.MsgServer = msgServer{}
// msgServer provides a way to reference keeper pointer in the message server interface.
type msgServer struct {
keeper *Keeper
}
// NewMsgServerImpl returns an instance of MsgServer for the provided keeper.
func NewMsgServerImpl(keeper *Keeper) types.MsgServer {
return &msgServer{
keeper: keeper,
}
}
// CreateGauge creates a gauge and sends coins to the gauge.
// Emits create gauge event and returns the create gauge response.
func (server msgServer) CreateGauge(
goCtx context.Context,
msg *types.MsgCreateGauge,
) (*types.MsgCreateGaugeResponse, error) {
if server.keeper.authority != msg.Owner {
return nil, errors.Wrapf(
types.ErrInvalidSigner,
"invalid authority; expected %s, got %s",
server.keeper.authority,
msg.Owner,
)
}
ctx := sdk.UnwrapSDKContext(goCtx)
owner, err := sdk.AccAddressFromBech32(msg.Owner)
if err != nil {
return nil, err
}
gauge, err := server.keeper.CreateGauge(
ctx,
msg.IsPerpetual,
owner,
msg.Coins,
msg.DistributeTo,
msg.StartTime,
msg.NumEpochsPaidOver,
msg.PricingTick,
)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, err.Error())
}
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(
types.TypeEvtCreateGauge,
sdk.NewAttribute(types.AttributeGaugeID, strconv.FormatUint(gauge.Id, 10)),
),
})
return &types.MsgCreateGaugeResponse{}, nil
}
// AddToGauge adds coins to gauge.
// Emits add to gauge event and returns the add to gauge response.
func (server msgServer) AddToGauge(
goCtx context.Context,
msg *types.MsgAddToGauge,
) (*types.MsgAddToGaugeResponse, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
owner, err := sdk.AccAddressFromBech32(msg.Owner)
if err != nil {
return nil, err
}
err = server.keeper.AddToGaugeRewards(ctx, owner, msg.Rewards, msg.GaugeId)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, err.Error())
}
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(
types.TypeEvtAddToGauge,
sdk.NewAttribute(types.AttributeGaugeID, strconv.FormatUint(msg.GaugeId, 10)),
),
})
return &types.MsgAddToGaugeResponse{}, nil
}
// StakeTokens stakes tokens in either two ways.
// 1. Add to an existing stake if a stake with the same owner and same duration exists.
// 2. Create a new stake if not.
// A sanity check to ensure given tokens is a single token is done in ValidateBaic.
// That is, a stake with multiple tokens cannot be created.
func (server msgServer) Stake(
goCtx context.Context,
msg *types.MsgStake,
) (*types.MsgStakeResponse, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
owner, err := sdk.AccAddressFromBech32(msg.Owner)
if err != nil {
return nil, err
}
params := server.keeper.GetParams(ctx)
startDistEpoch := server.keeper.ek.GetEpochInfo(ctx, params.DistrEpochIdentifier).CurrentEpoch
// if the owner + duration combination is new, create a new stake.
stake, err := server.keeper.CreateStake(ctx, owner, msg.Coins, ctx.BlockTime(), startDistEpoch)
if err != nil {
return nil, err
}
ctx.EventManager().EmitEvents(sdk.Events{
sdk.NewEvent(
types.TypeEvtStake,
sdk.NewAttribute(types.AttributeStakeID, strconv.FormatUint(stake.ID, 10)),
sdk.NewAttribute(types.AttributeStakeOwner, stake.Owner),
sdk.NewAttribute(types.AttributeStakeAmount, stake.Coins.String()),
),
})
return &types.MsgStakeResponse{ID: stake.ID}, nil
}
// BeginUnstaking begins unstaking of the specified stake.
// The stake would enter the unstaking queue, with the endtime of the stake set as block time + duration.
func (server msgServer) Unstake(
goCtx context.Context,
msg *types.MsgUnstake,
) (*types.MsgUnstakeResponse, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
unstakes := msg.Unstakes
if len(msg.Unstakes) == 0 {
stakes := server.keeper.GetStakesByAccount(ctx, sdk.AccAddress(msg.Owner))
unstakes = make([]*types.MsgUnstake_UnstakeDescriptor, len(stakes))
for i, stake := range stakes {
unstakes[i] = &types.MsgUnstake_UnstakeDescriptor{
ID: stake.ID,
Coins: sdk.NewCoins(),
}
}
}
for _, unstake := range unstakes {
stake, err := server.keeper.GetStakeByID(ctx, unstake.ID)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, err.Error())
}
if msg.Owner != stake.Owner {
return nil, sdkerrors.Wrap(
types.ErrNotStakeOwner,
fmt.Sprintf(
"msg sender (%s) and stake owner (%s) does not match",
msg.Owner,
stake.Owner,
),
)
}
_, err = server.keeper.Unstake(ctx, stake, unstake.Coins)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrInvalidRequest, err.Error())
}
}
// N.B. begin unstake event is emitted downstream in the keeper method.
return &types.MsgUnstakeResponse{}, nil
}