/
handler.go
171 lines (141 loc) · 5.43 KB
/
handler.go
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package token
import (
"fmt"
sdk "github.com/pocblockchain/pocc/types"
"github.com/pocblockchain/pocc/x/token/types"
)
//NewHandler create a token message handler
func NewHandler(keeper Keeper) sdk.Handler {
return func(ctx sdk.Context, msg sdk.Msg) sdk.Result {
ctx = ctx.WithEventManager(sdk.NewEventManager())
switch msg := msg.(type) {
case types.MsgNewToken:
return handleMsgNewToken(ctx, keeper, msg)
case types.MsgInflateToken:
return handleMsgInflateToken(ctx, keeper, msg)
case types.MsgBurnToken:
return handleMsgBurnToken(ctx, keeper, msg)
default:
errMsg := fmt.Sprintf("Unrecognized token Msg type: %v", msg.Type())
return sdk.ErrUnknownRequest(errMsg).Result()
}
}
}
func handleMsgNewToken(ctx sdk.Context, keeper Keeper, msg types.MsgNewToken) sdk.Result {
ctx.Logger().Info("handleMsgNewToken", "msg", msg)
if ti := keeper.GetTokenInfoWithoutSupply(ctx, msg.Symbol); ti != nil {
return sdk.ErrAlreadyExitSymbol(fmt.Sprintf("token %s already exist", msg.Symbol)).Result()
}
reserved := keeper.GetParams(ctx).ReservedSymbols
for _, r := range reserved {
if r == msg.Symbol.String() {
return types.ErrSymbolReserved(fmt.Sprintf("%v is reserved", msg.Symbol)).Result()
}
}
issueFee := sdk.NewCoins(sdk.NewCoin(sdk.NativeToken, keeper.GetParams(ctx).NewTokenFee))
//transfer openFee to communityPool
err := keeper.dk.AddCoinsFromAccountToFeePool(ctx, msg.From, issueFee)
if err != nil {
return err.Result()
}
//Set TokenInfo
totalSupply := msg.TotalSupply
keeper.SetTokenInfoWithoutSupply(ctx, &sdk.TokenInfoWithoutSupply{
Symbol: msg.Symbol,
Issuer: msg.From.String(),
IsSendEnabled: true,
Decimals: msg.Decimals,
})
//minted newCoins
mintedCoins := sdk.NewCoins(sdk.NewCoin(msg.Symbol.String(), msg.TotalSupply))
err = keeper.sk.MintCoins(ctx, types.ModuleName, mintedCoins)
if err != nil {
return err.Result()
}
err = keeper.sk.SendCoinsFromModuleToAccount(ctx, types.ModuleName, msg.To, mintedCoins)
if err != nil {
return err.Result()
}
//ignore events in SendCoinsFromAccountToModule and SendCoinsFromModuleToAccount
ctx = ctx.WithEventManager(sdk.NewEventManager())
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeNewToken,
sdk.NewAttribute(types.AttributeKeyIssuer, msg.From.String()),
sdk.NewAttribute(types.AttributeKeyRecipient, msg.To.String()),
sdk.NewAttribute(types.AttributeKeySymbol, msg.Symbol.String()),
sdk.NewAttribute(types.AttributeKeyAmount, totalSupply.String()),
sdk.NewAttribute(types.AttributeKeyIssueFee, issueFee.String()),
),
)
return sdk.Result{Events: ctx.EventManager().Events()}
}
func handleMsgInflateToken(ctx sdk.Context, keeper Keeper, msg types.MsgInflateToken) sdk.Result {
ctx.Logger().Info("handleMsgInflateToken", "msg", msg)
symbol := sdk.Symbol(msg.Amount[0].Denom)
if !keeper.IsSendEnabled(ctx, symbol) {
return sdk.ErrTransactionIsNotEnabled(fmt.Sprintf("%v is not sendenable", symbol)).Result()
}
//Only token owner can inflate token
if msg.From.String() != keeper.GetIssuer(ctx, symbol) {
return sdk.ErrInvalidAccount(fmt.Sprintf("%s is not allowed to inflate %v", msg.From, symbol)).Result()
}
//transfer openFee to communityPool
//since issuer have pay when new token, do not charge again when inflate token
//issueFee := sdk.NewCoins(sdk.NewCoin(sdk.NativeToken, keeper.GetParams(ctx).NewTokenFee))
//err := keeper.dk.AddCoinsFromAccountToFeePool(ctx, msg.From, issueFee)
//if err != nil {
// return err.Result()
//}
//minted inflatedCoins
inflatedCoins := sdk.NewCoins(msg.Amount[0])
err := keeper.sk.MintCoins(ctx, types.ModuleName, inflatedCoins)
if err != nil {
return err.Result()
}
err = keeper.sk.SendCoinsFromModuleToAccount(ctx, types.ModuleName, msg.To, inflatedCoins)
if err != nil {
return err.Result()
}
//ignore events in SendCoinsFromAccountToModule and SendCoinsFromModuleToAccount
ctx = ctx.WithEventManager(sdk.NewEventManager())
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeInflateToken,
sdk.NewAttribute(types.AttributeKeyIssuer, msg.From.String()),
sdk.NewAttribute(types.AttributeKeyRecipient, msg.To.String()),
sdk.NewAttribute(types.AttributeKeySymbol, symbol.String()),
sdk.NewAttribute(types.AttributeKeyAmount, msg.Amount[0].Amount.String()),
// sdk.NewAttribute(types.AttributeKeyIssueFee, issueFee.String()),
),
)
return sdk.Result{Events: ctx.EventManager().Events()}
}
func handleMsgBurnToken(ctx sdk.Context, keeper Keeper, msg types.MsgBurnToken) sdk.Result {
ctx.Logger().Info("handleMsgBurnToken", "msg", msg)
for _, coin := range msg.Amount {
if !keeper.IsSendEnabled(ctx, sdk.Symbol(coin.Denom)) {
return sdk.ErrTransactionIsNotEnabled(fmt.Sprintf("%v is not sendenable", coin.Denom)).Result()
}
}
//send the burned coins to token module
err := keeper.sk.SendCoinsFromAccountToModule(ctx, msg.From, types.ModuleName, msg.Amount)
if err != nil {
return err.Result()
}
//burn from token module
err = keeper.sk.BurnCoins(ctx, types.ModuleName, msg.Amount)
if err != nil {
return err.Result()
}
//ignore events in SendCoinsFromAccountToModule and SendCoinsFromModuleToAccount
ctx = ctx.WithEventManager(sdk.NewEventManager())
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeBurnToken,
sdk.NewAttribute(types.AttributeKeyBurner, msg.From.String()),
sdk.NewAttribute(types.AttributeKeyAmount, msg.Amount.String()),
),
)
return sdk.Result{Events: ctx.EventManager().Events()}
}