/
handler.go
108 lines (88 loc) · 2.88 KB
/
handler.go
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package hrc10
import (
"crypto/sha256"
"fmt"
"strings"
"golang.org/x/crypto/ripemd160"
"github.com/hbtc-chain/bhchain/base58"
sdk "github.com/hbtc-chain/bhchain/types"
"github.com/hbtc-chain/bhchain/x/hrc10/types"
)
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)
default:
errMsg := fmt.Sprintf("Unrecognized hrc10 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)
symbol := calSymbol(ctx)
if keeper.tk.HasToken(ctx, symbol) {
return sdk.ErrAlreadyExitSymbol(fmt.Sprintf("token %s already exist", symbol)).Result()
}
issueFee := sdk.NewCoin(sdk.NativeToken, keeper.GetParams(ctx).IssueTokenFee)
_, flow, err := keeper.trk.SubCoin(ctx, msg.From, issueFee)
if err != nil {
return err.Result()
}
// transfer openFee to communityPool
keeper.dk.AddToFeePool(ctx, sdk.NewDecCoins(sdk.NewCoins(issueFee)))
totalSupply := msg.TotalSupply
ti := &sdk.BaseToken{
Name: msg.Name,
Symbol: symbol,
Chain: sdk.NativeToken,
Issuer: msg.From.String(),
SendEnabled: true,
Decimals: msg.Decimals,
TotalSupply: totalSupply,
}
e := keeper.tk.CreateToken(ctx, ti)
if e != nil {
return sdk.ErrInternal(e.Error()).Result()
}
flows := make([]sdk.Flow, 0, 2)
flows = append(flows, flow)
//set tokeninfo
//minted newCoins
mintedCoin := sdk.NewCoin(ti.Symbol.String(), totalSupply)
_, flow, err = keeper.trk.AddCoin(ctx, msg.To, mintedCoin)
if err != nil {
return err.Result()
}
flows = append(flows, flow)
receipt := keeper.rk.NewReceipt(sdk.CategoryTypeHrc10, flows)
result := sdk.Result{}
keeper.rk.SaveReceiptToResult(receipt, &result)
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeNewToken,
sdk.NewAttribute(types.AttributeKeyName, msg.Name),
sdk.NewAttribute(types.AttributeKeyIssuer, msg.From.String()),
sdk.NewAttribute(types.AttributeKeyRecipient, msg.To.String()),
sdk.NewAttribute(types.AttributeKeySymbol, ti.Symbol.String()),
sdk.NewAttribute(types.AttributeKeyAmount, totalSupply.String()),
sdk.NewAttribute(types.AttributeKeyIssueFee, issueFee.String()),
),
)
result.Events = append(result.Events, ctx.EventManager().Events()...)
return result
}
func calSymbol(ctx sdk.Context) sdk.Symbol {
hasherSHA256 := sha256.New()
hasherSHA256.Write(ctx.TxBytes())
sha := hasherSHA256.Sum(nil)
hasherRIPEMD160 := ripemd160.New()
hasherRIPEMD160.Write(sha)
bz := hasherRIPEMD160.Sum(nil)
sum := base58.Checksum(bz)
bz = append(bz, sum[:]...)
symbol := strings.ToUpper(sdk.NativeToken) + base58.Encode(bz)
return sdk.Symbol(symbol)
}