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msg_server.go
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/
msg_server.go
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package keeper
import (
"context"
"math/big"
errorsmod "cosmossdk.io/errors"
"github.com/armon/go-metrics"
"github.com/cosmos/cosmos-sdk/telemetry"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/cosmos/cosmos-sdk/x/bank/types"
govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/crypto"
"github.com/haqq-network/haqq/contracts"
erc20types "github.com/haqq-network/haqq/x/erc20/types"
evmtypes "github.com/haqq-network/haqq/x/evm/types"
)
type msgServer struct {
WrappedBaseKeeper
}
// NewMsgServerImpl returns an implementation of the bank MsgServer interface
// for the provided Keeper.
func NewMsgServerImpl(keeper WrappedBaseKeeper) types.MsgServer {
return &msgServer{WrappedBaseKeeper: keeper}
}
var _ types.MsgServer = msgServer{}
func (k msgServer) Send(goCtx context.Context, msg *types.MsgSend) (*types.MsgSendResponse, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
if err := k.IsSendEnabledCoins(ctx, msg.Amount...); err != nil {
return nil, err
}
from, err := sdk.AccAddressFromBech32(msg.FromAddress)
if err != nil {
return nil, err
}
to, err := sdk.AccAddressFromBech32(msg.ToAddress)
if err != nil {
return nil, err
}
if k.BlockedAddr(to) {
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnauthorized, "%s is not allowed to receive funds", msg.ToAddress)
}
if err := k.sendCoinsWithERC20(ctx, from, to, msg.Amount); err != nil {
return nil, err
}
defer func() {
for _, a := range msg.Amount {
if a.Amount.IsInt64() {
telemetry.SetGaugeWithLabels(
[]string{"tx", "msg", "send"},
float32(a.Amount.Int64()),
[]metrics.Label{telemetry.NewLabel("denom", a.Denom)},
)
}
}
}()
return &types.MsgSendResponse{}, nil
}
// MultiSend copy of original method. TODO Add ERC20 support
func (k msgServer) MultiSend(goCtx context.Context, msg *types.MsgMultiSend) (*types.MsgMultiSendResponse, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
// NOTE: totalIn == totalOut should already have been checked
for _, in := range msg.Inputs {
if err := k.IsSendEnabledCoins(ctx, in.Coins...); err != nil {
return nil, err
}
}
for _, out := range msg.Outputs {
accAddr := sdk.MustAccAddressFromBech32(out.Address)
if k.BlockedAddr(accAddr) {
return nil, sdkerrors.Wrapf(sdkerrors.ErrUnauthorized, "%s is not allowed to receive transactions", out.Address)
}
}
err := k.InputOutputCoins(ctx, msg.Inputs, msg.Outputs)
if err != nil {
return nil, err
}
return &types.MsgMultiSendResponse{}, nil
}
func (k msgServer) UpdateParams(goCtx context.Context, req *types.MsgUpdateParams) (*types.MsgUpdateParamsResponse, error) {
if k.GetAuthority() != req.Authority {
return nil, sdkerrors.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.GetAuthority(), req.Authority)
}
ctx := sdk.UnwrapSDKContext(goCtx)
if err := k.SetParams(ctx, req.Params); err != nil {
return nil, err
}
return &types.MsgUpdateParamsResponse{}, nil
}
func (k msgServer) SetSendEnabled(goCtx context.Context, msg *types.MsgSetSendEnabled) (*types.MsgSetSendEnabledResponse, error) {
if k.GetAuthority() != msg.Authority {
return nil, sdkerrors.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.GetAuthority(), msg.Authority)
}
ctx := sdk.UnwrapSDKContext(goCtx)
if len(msg.SendEnabled) > 0 {
k.SetAllSendEnabled(ctx, msg.SendEnabled)
}
if len(msg.UseDefaultFor) > 0 {
k.DeleteSendEnabled(ctx, msg.UseDefaultFor...)
}
return &types.MsgSetSendEnabledResponse{}, nil
}
func (k msgServer) sendCoinsWithERC20(ctx sdk.Context, from sdk.AccAddress, to sdk.AccAddress, amt sdk.Coins) error {
// Use original SendCoins method is ERC20 is disabled
if !k.ek.IsERC20Enabled(ctx) {
return k.SendCoins(ctx, from, to, amt)
}
nativeCoins := sdk.NewCoins()
sdkCtx := sdk.UnwrapSDKContext(ctx)
// Convert and transfer registered ERC20 tokens
for _, coin := range amt {
tokenPairID := k.ek.GetTokenPairID(sdkCtx, coin.Denom)
if len(tokenPairID) == 0 {
// If no such pair registered for the given denom, try to send as a native coin
nativeCoins = append(nativeCoins, coin)
continue
}
tokenPair, found := k.ek.GetTokenPair(sdkCtx, tokenPairID)
if !found || !tokenPair.Enabled {
// if tokenPair is Disabled or not found, try to transfer on Cosmos layer without conversion
nativeCoins = append(nativeCoins, coin)
continue
}
if err := k.subUnlockedERC20Tokens(ctx, tokenPair, from, to, coin); err != nil {
return err
}
// Create account if recipient does not exist.
//
// NOTE: This should ultimately be removed in favor a more flexible approach
// such as delegated fee messages.
accExists := k.ak.HasAccount(ctx, to)
if !accExists {
defer telemetry.IncrCounter(1, "new", "account")
k.ak.SetAccount(ctx, k.ak.NewAccountWithAddress(ctx, to))
}
}
// Send native the rest native coins
return k.SendCoins(ctx, from, to, nativeCoins)
}
func (k msgServer) subUnlockedERC20Tokens(ctx sdk.Context, tokenPair erc20types.TokenPair, fromAddr sdk.AccAddress, toAddr sdk.AccAddress, amt sdk.Coin) error {
if !amt.IsValid() {
return sdkerrors.Wrap(sdkerrors.ErrInvalidCoins, amt.String())
}
lockedCoins := k.LockedCoins(ctx, fromAddr)
balance := k.GetBalance(ctx, fromAddr, amt.Denom)
locked := sdk.NewCoin(amt.Denom, lockedCoins.AmountOf(amt.Denom))
spendable := balance.Sub(locked)
sdkCtx := sdk.UnwrapSDKContext(ctx)
erc20 := contracts.ERC20MinterBurnerDecimalsContract.ABI
contract := tokenPair.GetERC20Contract()
evmFromAddr := common.BytesToAddress(fromAddr.Bytes())
evmFromBalanceToken := k.ek.BalanceOf(sdkCtx, erc20, contract, evmFromAddr)
if evmFromBalanceToken == nil {
return errorsmod.Wrap(erc20types.ErrEVMCall, "failed to retrieve sender's balance")
}
evmBalance := sdk.NewCoin(tokenPair.Denom, sdk.NewIntFromBigInt(evmFromBalanceToken))
_, hasNeg := sdk.Coins{spendable.Add(evmBalance)}.SafeSub(amt)
if hasNeg {
return sdkerrors.Wrapf(sdkerrors.ErrInsufficientFunds, "%s is smaller than %s", spendable, amt)
}
if !spendable.IsZero() {
// Build MsgConvertCoin, from recipient to recipient since IBC transfer already occurred
msg := erc20types.NewMsgConvertCoin(spendable, evmFromAddr, fromAddr)
if _, err := k.ek.ConvertCoin(sdk.WrapSDKContext(ctx), msg); err != nil {
return errorsmod.Wrap(err, "failed to convert coins")
}
}
evmToAddr := common.BytesToAddress(toAddr.Bytes())
evmToBalanceTokenBefore := k.ek.BalanceOf(sdkCtx, erc20, contract, evmToAddr)
if evmToBalanceTokenBefore == nil {
return errorsmod.Wrap(erc20types.ErrEVMCall, "failed to retrieve receiver's balance")
}
// Transfer Tokens to receiver
res, err := k.ek.CallEVM(ctx, erc20, evmFromAddr, contract, true, "transfer", evmToAddr, amt.Amount.BigInt())
if err != nil {
return errorsmod.Wrap(err, "failed to transfer erc20 tokens: call evm")
}
// Check unpackedRet execution
var unpackedRet erc20types.ERC20BoolResponse
if err := erc20.UnpackIntoInterface(&unpackedRet, "transfer", res.Ret); err != nil {
return errorsmod.Wrap(err, "failed to transfer erc20 tokens: unpack")
}
if !unpackedRet.Value {
return errorsmod.Wrap(err, "failed to transfer erc20 tokens")
}
// Check expected balance after transfer execution
evmToBalanceTokenAfter := k.ek.BalanceOf(sdkCtx, erc20, contract, evmToAddr)
if evmToBalanceTokenAfter == nil {
return errorsmod.Wrap(erc20types.ErrEVMCall, "failed to retrieve receiver's balance")
}
expToken := big.NewInt(0).Add(evmToBalanceTokenBefore, amt.Amount.BigInt())
if r := evmToBalanceTokenAfter.Cmp(expToken); r != 0 {
return errorsmod.Wrapf(
erc20types.ErrBalanceInvariance,
"invalid token balance - expected: %v, actual: %v",
expToken, evmToBalanceTokenAfter,
)
}
// Check for unexpected `Approval` event in logs
if err := k.monitorApprovalEvent(res); err != nil {
return err
}
// No events to be sent, all necessary events have been emitted by ConvertCoin method, other logic is on EVM layer
return nil
}
// monitorApprovalEvent returns an error if the given transactions logs include
// an unexpected `Approval` event
// NOTE: copy from ERC20Keeper
func (k msgServer) monitorApprovalEvent(res *evmtypes.MsgEthereumTxResponse) error {
if res == nil || len(res.Logs) == 0 {
return nil
}
logApprovalSig := []byte("Approval(address,address,uint256)")
logApprovalSigHash := crypto.Keccak256Hash(logApprovalSig)
for _, log := range res.Logs {
if log.Topics[0] == logApprovalSigHash.Hex() {
return errorsmod.Wrapf(
erc20types.ErrUnexpectedEvent, "unexpected Approval event",
)
}
}
return nil
}