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keeper.go
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keeper.go
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package keeper
import (
"errors"
"fmt"
oracletypes "github.com/Sifchain/sifnode/x/oracle/types"
"github.com/tendermint/tendermint/libs/log"
"github.com/cosmos/cosmos-sdk/codec"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/Sifchain/sifnode/x/ethbridge/types"
)
const errorMessageKey = "errorMessageKey"
// Keeper maintains the link to data storage and
// exposes getter/setter methods for the various parts of the state machine
type Keeper struct {
cdc codec.BinaryCodec // The wire codec for binary encoding/decoding.
accountKeeper types.AccountKeeper
bankKeeper types.BankKeeper
oracleKeeper types.OracleKeeper
adminKeeper types.AdminKeeper
storeKey sdk.StoreKey
}
// NewKeeper creates new instances of the oracle Keeper
func NewKeeper(cdc codec.BinaryCodec, bankKeeper types.BankKeeper, oracleKeeper types.OracleKeeper, accountKeeper types.AccountKeeper, adminKeeper types.AdminKeeper, storeKey sdk.StoreKey) Keeper {
return Keeper{
cdc: cdc,
accountKeeper: accountKeeper,
bankKeeper: bankKeeper,
oracleKeeper: oracleKeeper,
adminKeeper: adminKeeper,
storeKey: storeKey,
}
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", fmt.Sprintf("x/%s", types.ModuleName))
}
// ProcessClaim processes a new claim coming in from a validator
func (k Keeper) ProcessClaim(ctx sdk.Context, claim *types.EthBridgeClaim) (oracletypes.Status, error) {
logger := k.Logger(ctx)
oracleClaim, err := types.CreateOracleClaimFromEthClaim(claim)
if err != nil {
logger.Error("failed to create oracle claim from eth claim.",
errorMessageKey, err.Error())
return oracletypes.Status{}, err
}
return k.oracleKeeper.ProcessClaim(ctx, oracleClaim)
}
// ProcessSuccessfulClaim processes a claim that has just completed successfully with consensus
func (k Keeper) ProcessSuccessfulClaim(ctx sdk.Context, claim string) error {
logger := k.Logger(ctx)
oracleClaim, err := types.CreateOracleClaimFromOracleString(claim)
if err != nil {
logger.Error("failed to create oracle claim from oracle string.",
errorMessageKey, err.Error())
return err
}
receiverAddress := oracleClaim.CosmosReceiver
var coins sdk.Coins
switch oracleClaim.ClaimType {
case types.ClaimType_CLAIM_TYPE_LOCK:
symbol := fmt.Sprintf("%v%v", types.PeggedCoinPrefix, oracleClaim.Symbol)
k.AddPeggyToken(ctx, symbol)
coins = sdk.NewCoins(sdk.NewCoin(symbol, oracleClaim.Amount))
err = k.bankKeeper.MintCoins(ctx, types.ModuleName, coins)
case types.ClaimType_CLAIM_TYPE_BURN:
coins = sdk.NewCoins(sdk.NewCoin(oracleClaim.Symbol, oracleClaim.Amount))
err = k.bankKeeper.MintCoins(ctx, types.ModuleName, coins)
default:
err = types.ErrInvalidClaimType
}
if err != nil {
logger.Error("failed to process successful claim.",
errorMessageKey, err.Error())
return err
}
if err := k.bankKeeper.SendCoinsFromModuleToAccount(
ctx, types.ModuleName, receiverAddress, coins,
); err != nil {
panic(err)
}
return nil
}
// ProcessBurn processes the burn of bridged coins from the given sender
func (k Keeper) ProcessBurn(ctx sdk.Context, cosmosSender sdk.AccAddress, msg *types.MsgBurn) error {
logger := k.Logger(ctx)
var coins sdk.Coins
if k.IsBlacklisted(ctx, msg.EthereumReceiver) {
return types.ErrInvalidEthAddress
}
if k.IsCethReceiverAccountSet(ctx) {
coins = sdk.NewCoins(sdk.NewCoin(types.CethSymbol, msg.CethAmount))
err := k.bankKeeper.SendCoins(ctx, cosmosSender, k.GetCethReceiverAccount(ctx), coins)
if err != nil {
logger.Error("failed to send ceth from account to account.",
errorMessageKey, err.Error())
return err
}
coins = sdk.NewCoins(sdk.NewCoin(msg.Symbol, msg.Amount))
} else {
if msg.Symbol == types.CethSymbol {
coins = sdk.NewCoins(sdk.NewCoin(types.CethSymbol, msg.CethAmount.Add(msg.Amount)))
} else {
coins = sdk.NewCoins(sdk.NewCoin(msg.Symbol, msg.Amount), sdk.NewCoin(types.CethSymbol, msg.CethAmount))
}
}
err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, cosmosSender, types.ModuleName, coins)
if err != nil {
logger.Error("failed to send ceth from module to account.",
errorMessageKey, err.Error())
return err
}
coins = sdk.NewCoins(sdk.NewCoin(msg.Symbol, msg.Amount))
err = k.bankKeeper.BurnCoins(ctx, types.ModuleName, coins)
if err != nil {
logger.Error("failed to burn locked coin.",
errorMessageKey, err.Error())
return err
}
return nil
}
// ProcessLock processes the lockup of cosmos coins from the given sender
func (k Keeper) ProcessLock(ctx sdk.Context, cosmosSender sdk.AccAddress, msg *types.MsgLock) error {
logger := k.Logger(ctx)
if k.IsBlacklisted(ctx, msg.EthereumReceiver) {
return types.ErrInvalidEthAddress
}
var coins sdk.Coins
if k.IsCethReceiverAccountSet(ctx) {
coins = sdk.NewCoins(sdk.NewCoin(types.CethSymbol, msg.CethAmount))
err := k.bankKeeper.SendCoins(ctx, cosmosSender, k.GetCethReceiverAccount(ctx), coins)
if err != nil {
logger.Error("failed to send ceth from account to account.",
errorMessageKey, err.Error())
return err
}
coins = sdk.NewCoins(sdk.NewCoin(msg.Symbol, msg.Amount))
} else {
coins = sdk.NewCoins(sdk.NewCoin(msg.Symbol, msg.Amount), sdk.NewCoin(types.CethSymbol, msg.CethAmount))
}
err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, cosmosSender, types.ModuleName, coins)
if err != nil {
logger.Error("failed to transfer coin from account to module.", errorMessageKey, err.Error())
return err
}
coins = sdk.NewCoins(sdk.NewCoin(msg.Symbol, msg.Amount))
err = k.bankKeeper.BurnCoins(ctx, types.ModuleName, coins)
if err != nil {
logger.Error("failed to burn burned coin.", errorMessageKey, err.Error())
return err
}
return nil
}
// ProcessUpdateWhiteListValidator processes the update whitelist validator from admin
func (k Keeper) ProcessUpdateWhiteListValidator(ctx sdk.Context, cosmosSender sdk.AccAddress, validator sdk.ValAddress, operationtype string) error {
return k.oracleKeeper.ProcessUpdateWhiteListValidator(ctx, cosmosSender, validator, operationtype)
}
// ProcessUpdateCethReceiverAccount processes the update whitelist validator from admin
func (k Keeper) ProcessUpdateCethReceiverAccount(ctx sdk.Context, cosmosSender sdk.AccAddress, cethReceiverAccount sdk.AccAddress) error {
logger := k.Logger(ctx)
if !k.oracleKeeper.IsAdminAccount(ctx, cosmosSender) {
logger.Error("cosmos sender is not admin account.")
return errors.New("only admin account can update ceth receiver account")
}
k.SetCethReceiverAccount(ctx, cethReceiverAccount)
return nil
}
// ProcessRescueCeth transfer ceth from ethbridge module to an account
func (k Keeper) ProcessRescueCeth(ctx sdk.Context, msg *types.MsgRescueCeth) error {
logger := k.Logger(ctx)
cosmosSender, err := sdk.AccAddressFromBech32(msg.CosmosSender)
if err != nil {
return err
}
cosmosReceiver, err := sdk.AccAddressFromBech32(msg.CosmosReceiver)
if err != nil {
return err
}
if !k.oracleKeeper.IsAdminAccount(ctx, cosmosSender) {
logger.Error("cosmos sender is not admin account.")
return errors.New("only admin account can call rescue ceth")
}
coins := sdk.NewCoins(sdk.NewCoin(types.CethSymbol, msg.CethAmount))
err = k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, cosmosReceiver, coins)
if err != nil {
logger.Error("failed to transfer coin from module to account.",
errorMessageKey, err.Error())
return err
}
return nil
}
// Exists chec if the key existed in db.
func (k Keeper) Exists(ctx sdk.Context, key []byte) bool {
store := ctx.KVStore(k.storeKey)
return store.Has(key)
}