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msg_server.go
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/
msg_server.go
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package keeper
import (
"context"
"fmt"
"strings"
errorsmod "cosmossdk.io/errors"
sdkmath "cosmossdk.io/math"
"github.com/armon/go-metrics"
"github.com/cosmos/cosmos-sdk/telemetry"
sdk "github.com/cosmos/cosmos-sdk/types"
errortypes "github.com/cosmos/cosmos-sdk/types/errors"
banktypes "github.com/cosmos/cosmos-sdk/x/bank/types"
govtypes "github.com/cosmos/cosmos-sdk/x/gov/types"
ibctransfertypes "github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
"github.com/ethereum/go-ethereum/common"
fxtypes "github.com/functionx/fx-core/v4/types"
"github.com/functionx/fx-core/v4/x/erc20/types"
)
var _ types.MsgServer = &Keeper{}
// ConvertCoin converts Cosmos-native Coins into ERC20 tokens for both
// Cosmos-native and ERC20 TokenPair Owners
func (k Keeper) ConvertCoin(goCtx context.Context, msg *types.MsgConvertCoin) (*types.MsgConvertCoinResponse, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
sender := sdk.MustAccAddressFromBech32(msg.Sender)
receiver := common.HexToAddress(msg.Receiver)
pair, err := k.MintingEnabled(ctx, receiver.Bytes(), msg.Coin.Denom)
if err != nil {
return nil, err
}
// Remove token pair if contract is suicided
if acc := k.evmKeeper.GetAccountWithoutBalance(ctx, pair.GetERC20Contract()); acc == nil || !acc.IsContract() {
k.RemoveTokenPair(ctx, pair)
k.Logger(ctx).Debug("deleting selfdestructed token pair from state", "contract", pair.Erc20Address)
// NOTE: return nil error to persist the changes from the deletion
return &types.MsgConvertCoinResponse{}, nil
}
// Check ownership and execute conversion
switch {
case pair.IsNativeCoin():
err = k.ConvertCoinNativeCoin(ctx, pair, sender, receiver, msg.Coin)
case pair.IsNativeERC20():
err = k.ConvertCoinNativeERC20(ctx, pair, sender, receiver, msg.Coin)
default:
return nil, types.ErrUndefinedOwner
}
if err != nil {
return nil, err
}
defer func() {
telemetry.IncrCounterWithLabels(
[]string{"tx", "msg", "convert", "coin", "total"},
1,
[]metrics.Label{
telemetry.NewLabel("denom", pair.Denom),
telemetry.NewLabel("erc20", pair.Erc20Address),
},
)
}()
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeConvertCoin,
sdk.NewAttribute(sdk.AttributeKeySender, msg.Sender),
sdk.NewAttribute(types.AttributeKeyReceiver, msg.Receiver),
sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Coin.Amount.String()),
sdk.NewAttribute(types.AttributeKeyDenom, msg.Coin.Denom),
sdk.NewAttribute(types.AttributeKeyTokenAddress, pair.Erc20Address),
))
return &types.MsgConvertCoinResponse{}, nil
}
// ConvertERC20 converts ERC20 tokens into Cosmos-native Coins for both
// Cosmos-native and ERC20 TokenPair Owners
func (k Keeper) ConvertERC20(goCtx context.Context, msg *types.MsgConvertERC20) (*types.MsgConvertERC20Response, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
sender := common.HexToAddress(msg.Sender)
receiver := sdk.MustAccAddressFromBech32(msg.Receiver)
pair, err := k.MintingEnabled(ctx, receiver, msg.ContractAddress)
if err != nil {
return nil, err
}
// Remove token pair if contract is suicided
if acc := k.evmKeeper.GetAccountWithoutBalance(ctx, pair.GetERC20Contract()); acc == nil || !acc.IsContract() {
k.RemoveTokenPair(ctx, pair)
k.Logger(ctx).Debug("deleting selfdestructed token pair from state", "contract", pair.Erc20Address)
// NOTE: return nil error to persist the changes from the deletion
return &types.MsgConvertERC20Response{}, nil
}
// Check ownership and execute conversion
switch {
case pair.IsNativeCoin():
err = k.ConvertERC20NativeCoin(ctx, pair, sender, receiver, msg.Amount)
case pair.IsNativeERC20():
err = k.ConvertERC20NativeToken(ctx, pair, sender, receiver, msg.Amount)
default:
return nil, types.ErrUndefinedOwner
}
if err != nil {
return nil, err
}
defer func() {
telemetry.IncrCounterWithLabels(
[]string{"tx", "msg", "convert", "erc20", "total"},
1,
[]metrics.Label{
telemetry.NewLabel("denom", pair.Denom),
telemetry.NewLabel("erc20", pair.Erc20Address),
},
)
}()
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeConvertERC20,
sdk.NewAttribute(sdk.AttributeKeySender, msg.Sender),
sdk.NewAttribute(types.AttributeKeyReceiver, msg.Receiver),
sdk.NewAttribute(sdk.AttributeKeyAmount, msg.Amount.String()),
sdk.NewAttribute(types.AttributeKeyDenom, pair.Denom),
sdk.NewAttribute(types.AttributeKeyTokenAddress, msg.ContractAddress),
))
return &types.MsgConvertERC20Response{}, nil
}
// ConvertDenom converts coin into other coin, use for multiple chains in the same currency
func (k Keeper) ConvertDenom(goCtx context.Context, msg *types.MsgConvertDenom) (*types.MsgConvertDenomResponse, error) {
ctx := sdk.UnwrapSDKContext(goCtx)
// Error checked during msg validation
sender := sdk.MustAccAddressFromBech32(msg.Sender)
receiver := sdk.MustAccAddressFromBech32(msg.Receiver)
fxTarget := fxtypes.ParseFxTarget(msg.Target)
targetCoin, err := k.ConvertDenomToTarget(ctx, sender, msg.Coin, fxTarget)
if err != nil {
return nil, err
}
if targetCoin.Denom == msg.Coin.Denom {
return nil, errorsmod.Wrapf(types.ErrInvalidDenom, "convert to source denom: %s", msg.Coin.Denom)
}
if !sender.Equals(receiver) {
if err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, sender, types.ModuleName, sdk.NewCoins(targetCoin)); err != nil {
return nil, err
}
if err := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, receiver, sdk.NewCoins(targetCoin)); err != nil {
return nil, err
}
}
defer func() {
telemetry.IncrCounterWithLabels(
[]string{"tx", "msg", "convert", "denom", "total"},
1,
[]metrics.Label{
telemetry.NewLabel("denom", msg.Coin.Denom),
telemetry.NewLabel("target", msg.Target),
},
)
}()
return &types.MsgConvertDenomResponse{}, nil
}
// ConvertCoinNativeCoin handles the Coin conversion flow for a native coin
// token pair:
// - Escrow Coins on module account (Coins are not burned)
// - Mint Tokens and send to receiver
// - Check if token balance increased by amount
func (k Keeper) ConvertCoinNativeCoin(ctx sdk.Context, pair types.TokenPair, sender sdk.AccAddress, receiver common.Address, coin sdk.Coin) error {
// NOTE: ignore validation from NewCoin constructor
coins := sdk.Coins{coin}
// Escrow Coins on module account
if err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, sender, types.ModuleName, coins); err != nil {
return errorsmod.Wrap(err, "failed to escrow coins")
}
erc20 := fxtypes.GetFIP20().ABI
contract := pair.GetERC20Contract()
// Mint Tokens and send to receiver
_, err := k.evmKeeper.ApplyContract(ctx, k.moduleAddress, contract, erc20, "mint", receiver, coin.Amount.BigInt())
if err != nil {
return err
}
if pair.Denom == fxtypes.DefaultDenom {
if err := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, contract.Bytes(), coins); err != nil {
return errorsmod.Wrap(err, "failed to transfer escrow coins to origin denom")
}
}
return nil
}
// ConvertERC20NativeCoin handles the erc20 conversion flow for a native coin token pair:
// - Burn escrowed tokens
// - Unescrow coins that have been previously escrowed with ConvertCoin
// - Check if coin balance increased by amount
// - Check if token balance decreased by amount
func (k Keeper) ConvertERC20NativeCoin(ctx sdk.Context, pair types.TokenPair, sender common.Address, receiver sdk.AccAddress, amount sdkmath.Int) error {
erc20 := fxtypes.GetFIP20().ABI
contract := pair.GetERC20Contract()
// Burn escrowed tokens
_, err := k.evmKeeper.ApplyContract(ctx, k.moduleAddress, contract, erc20, "burn", sender, amount.BigInt())
if err != nil {
return err
}
// NOTE: coin fields already validated
coins := sdk.Coins{sdk.Coin{Denom: pair.Denom, Amount: amount}}
// Transfer origin denom to module
if pair.Denom == fxtypes.DefaultDenom {
if err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, contract.Bytes(), types.ModuleName, coins); err != nil {
return errorsmod.Wrap(err, "failed to transfer origin denom to module")
}
}
// Unescrow Coins and send to receiver
if err := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, receiver, coins); err != nil {
return err
}
return nil
}
// ConvertERC20NativeToken handles the erc20 conversion flow for a native erc20 token pair:
// - Escrow tokens on module account (Don't burn as module is not contract owner)
// - Mint coins on module
// - Send minted coins to the receiver
// - Check if coin balance increased by amount
// - Check if token balance decreased by amount
// - Check for unexpected `approve` event in logs
func (k Keeper) ConvertERC20NativeToken(ctx sdk.Context, pair types.TokenPair, sender common.Address, receiver sdk.AccAddress, amount sdkmath.Int) error {
erc20 := fxtypes.GetFIP20().ABI
// Escrow tokens on module account
contract := pair.GetERC20Contract()
res, err := k.evmKeeper.ApplyContract(ctx, sender, contract, erc20, "transfer", k.moduleAddress, amount.BigInt())
if err != nil {
return err
}
// Check unpackedRet execution
var unpackedRet struct{ Value bool }
if err := erc20.UnpackIntoInterface(&unpackedRet, "transfer", res.Ret); err != nil {
return errorsmod.Wrapf(types.ErrABIUnpack, "failed to unpack transfer: %s", err.Error())
}
if !unpackedRet.Value {
return errorsmod.Wrap(errortypes.ErrLogic, "failed to execute transfer")
}
// Mint coins
// NOTE: coin fields already validated
coins := sdk.Coins{sdk.Coin{Denom: pair.Denom, Amount: amount}}
if err := k.bankKeeper.MintCoins(ctx, types.ModuleName, coins); err != nil {
return err
}
// Send minted coins to the receiver
if err := k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, receiver, coins); err != nil {
return err
}
// Check for unexpected `approve` event in logs
if err = k.monitorApprovalEvent(res); err != nil {
return err
}
return nil
}
// ConvertCoinNativeERC20 handles the Coin conversion flow for a native ERC20
// token pair:
// - Escrow Coins on module account
// - Unescrow Tokens that have been previously escrowed with ConvertERC20 and send to receiver
// - Burn escrowed Coins
// - Check if token balance increased by amount
// - Check for unexpected `approve` event in logs
func (k Keeper) ConvertCoinNativeERC20(ctx sdk.Context, pair types.TokenPair, sender sdk.AccAddress, receiver common.Address, coin sdk.Coin) error {
// NOTE: ignore validation from NewCoin constructor
coins := sdk.Coins{coin}
// Escrow Coins on module account
if err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, sender, types.ModuleName, coins); err != nil {
return errorsmod.Wrap(err, "failed to escrow coins")
}
erc20 := fxtypes.GetFIP20().ABI
contract := pair.GetERC20Contract()
// Unescrow Tokens and send to receiver
res, err := k.evmKeeper.ApplyContract(ctx, k.moduleAddress, contract, erc20, "transfer", receiver, coin.Amount.BigInt())
if err != nil {
return err
}
// Check unpackedRet execution
var unpackedRet struct{ Value bool }
if err := erc20.UnpackIntoInterface(&unpackedRet, "transfer", res.Ret); err != nil {
return errorsmod.Wrapf(types.ErrABIUnpack, "failed to unpack transfer: %s", err.Error())
}
if !unpackedRet.Value {
return errorsmod.Wrap(errortypes.ErrLogic, "failed to execute unescrow tokens from user")
}
// Burn escrowed Coins
if err = k.bankKeeper.BurnCoins(ctx, types.ModuleName, coins); err != nil {
return errorsmod.Wrap(err, "failed to burn coins")
}
// Check for unexpected `approve` event in logs
if err = k.monitorApprovalEvent(res); err != nil {
return err
}
return nil
}
func (k Keeper) ConvertDenomToTarget(ctx sdk.Context, from sdk.AccAddress, coin sdk.Coin, fxTarget fxtypes.FxTarget) (sdk.Coin, error) {
if coin.Denom == fxtypes.DefaultDenom {
return coin, nil
}
var metadata banktypes.Metadata
if k.IsDenomRegistered(ctx, coin.Denom) {
// is base denom
var found bool
metadata, found = k.HasDenomAlias(ctx, coin.Denom)
if !found { // no convert required
return coin, nil
}
} else {
// is alias denom
denom, found := k.GetAliasDenom(ctx, coin.Denom)
if !found { // no convert required
return coin, nil
}
// NOTE: metadata must exist, and alias must exist
metadata, found = k.HasDenomAlias(ctx, denom)
if !found { // no convert required
return coin, nil
}
}
targetDenom := k.ToTargetDenom(ctx, coin.Denom, metadata.Base, metadata.DenomUnits[0].Aliases, fxTarget)
if coin.Denom == targetDenom {
return coin, nil
}
targetCoin := sdk.NewCoin(targetDenom, coin.Amount)
// send denom to module
err := k.bankKeeper.SendCoinsFromAccountToModule(ctx, from, types.ModuleName, sdk.NewCoins(coin))
if err != nil {
return sdk.Coin{}, err
}
if err := k.convertDenomToContractOwner(ctx, targetCoin, coin, metadata); err != nil {
return sdk.Coin{}, err
}
// send alias denom to from addr
if err = k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, from, sdk.NewCoins(targetCoin)); err != nil {
return sdk.Coin{}, err
}
ctx.EventManager().EmitEvent(sdk.NewEvent(
types.EventTypeConvertDenom,
sdk.NewAttribute(types.AttributeKeyFrom, from.String()),
sdk.NewAttribute(sdk.AttributeKeyAmount, coin.Amount.String()),
sdk.NewAttribute(types.AttributeKeyDenom, coin.Denom),
sdk.NewAttribute(types.AttributeKeyTargetDenom, targetCoin.Denom),
))
return targetCoin, nil
}
func (k Keeper) convertDenomToContractOwner(ctx sdk.Context, targetCoin, coin sdk.Coin, metadata banktypes.Metadata) error {
pair, found := k.GetTokenPair(ctx, metadata.Base)
if !found {
return errorsmod.Wrapf(types.ErrTokenPairNotFound, "convert denom: %s", metadata.Base)
}
if pair.IsNativeCoin() {
if coin.Denom == metadata.Base {
// burn coin
if err := k.bankKeeper.BurnCoins(ctx, types.ModuleName, sdk.NewCoins(coin)); err != nil {
return err
}
} else if targetCoin.Denom == metadata.Base {
// mint denom
if err := k.bankKeeper.MintCoins(ctx, types.ModuleName, sdk.NewCoins(targetCoin)); err != nil {
return err
}
}
return nil
} else if pair.IsNativeERC20() {
if coin.Denom == metadata.Base {
if err := k.bankKeeper.MintCoins(ctx, types.ModuleName, sdk.NewCoins(targetCoin)); err != nil {
return err
}
} else if targetCoin.Denom == metadata.Base {
if err := k.bankKeeper.BurnCoins(ctx, types.ModuleName, sdk.NewCoins(coin)); err != nil {
return err
}
}
return nil
}
return errorsmod.Wrapf(types.ErrUndefinedOwner, "convert denom:%s, pair undefined owner.", metadata.Base)
}
func (k Keeper) UpdateParams(c context.Context, req *types.MsgUpdateParams) (*types.MsgUpdateParamsResponse, error) {
if k.authority != req.Authority {
return nil, errorsmod.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.authority, req.Authority)
}
ctx := sdk.UnwrapSDKContext(c)
if err := k.SetParams(ctx, &req.Params); err != nil {
return nil, err
}
return &types.MsgUpdateParamsResponse{}, nil
}
func (k Keeper) RegisterCoin(c context.Context, req *types.MsgRegisterCoin) (*types.MsgRegisterCoinResponse, error) {
if k.authority != req.Authority {
return nil, errorsmod.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.authority, req.Authority)
}
ctx := sdk.UnwrapSDKContext(c)
pair, err := k.RegisterNativeCoin(ctx, req.Metadata)
if err != nil {
return nil, err
}
return &types.MsgRegisterCoinResponse{Pair: *pair}, nil
}
func (k Keeper) RegisterERC20(c context.Context, req *types.MsgRegisterERC20) (*types.MsgRegisterERC20Response, error) {
if k.authority != req.Authority {
return nil, errorsmod.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.authority, req.Authority)
}
ctx := sdk.UnwrapSDKContext(c)
pair, err := k.RegisterNativeERC20(ctx, common.HexToAddress(req.Erc20Address), req.Aliases...)
if err != nil {
return nil, err
}
return &types.MsgRegisterERC20Response{Pair: *pair}, nil
}
func (k Keeper) ToggleTokenConversion(c context.Context, req *types.MsgToggleTokenConversion) (*types.MsgToggleTokenConversionResponse, error) {
if k.authority != req.Authority {
return nil, errorsmod.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.authority, req.Authority)
}
ctx := sdk.UnwrapSDKContext(c)
pair, err := k.ToggleTokenConvert(ctx, req.Token)
if err != nil {
return nil, err
}
return &types.MsgToggleTokenConversionResponse{Pair: pair}, nil
}
func (k Keeper) UpdateDenomAlias(c context.Context, req *types.MsgUpdateDenomAlias) (*types.MsgUpdateDenomAliasResponse, error) {
if k.authority != req.Authority {
return nil, errorsmod.Wrapf(govtypes.ErrInvalidSigner, "invalid authority; expected %s, got %s", k.authority, req.Authority)
}
ctx := sdk.UnwrapSDKContext(c)
_, err := k.UpdateDenomAliases(ctx, req.Denom, req.Alias)
if err != nil {
return nil, err
}
return &types.MsgUpdateDenomAliasResponse{}, nil
}
func (k Keeper) ToTargetDenom(ctx sdk.Context, denom, base string, aliases []string, fxTarget fxtypes.FxTarget) string {
// erc20
if len(fxTarget.GetTarget()) <= 0 || fxTarget.GetTarget() == types.ModuleName {
return base
}
if len(aliases) <= 0 {
return denom
}
for _, alias := range aliases {
if fxTarget.IsIBC() && strings.HasPrefix(alias, ibctransfertypes.DenomPrefix+"/") {
hexHash := strings.TrimPrefix(alias, ibctransfertypes.DenomPrefix+"/")
hash, err := ibctransfertypes.ParseHexHash(hexHash)
if err != nil {
k.Logger(ctx).Info("invalid ibc denom", "denom", alias)
continue
}
denomTrace, found := k.ibcTransferKeeper.GetDenomTrace(ctx, hash)
if !found {
continue
}
if !strings.HasPrefix(denomTrace.GetPath(), fmt.Sprintf("%s/%s", fxTarget.SourcePort, fxTarget.SourceChannel)) {
continue
}
return alias
}
if strings.HasPrefix(alias, fxTarget.GetTarget()) {
return alias
}
}
return denom
}