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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| package keeper | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| errorsmod "cosmossdk.io/errors" | ||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| eth "github.com/ethereum/go-ethereum/common" | ||
| ethtypes "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/zeta-chain/zetacore/common" | ||
| "github.com/zeta-chain/zetacore/x/crosschain/types" | ||
| observerTypes "github.com/zeta-chain/zetacore/x/observer/types" | ||
| ) | ||
|
|
||
| func (k msgServer) AddToInTxTracker(goCtx context.Context, msg *types.MsgAddToInTxTracker) (*types.MsgAddToInTxTrackerResponse, error) { | ||
| ctx := sdk.UnwrapSDKContext(goCtx) | ||
| chain := k.zetaObserverKeeper.GetParams(ctx).GetChainFromChainID(msg.ChainId) | ||
| if chain == nil { | ||
| return nil, observerTypes.ErrSupportedChains | ||
| } | ||
|
|
||
| adminPolicyAccount := k.zetaObserverKeeper.GetParams(ctx).GetAdminPolicyAccount(observerTypes.Policy_Type_group1) | ||
| isAdmin := msg.Creator == adminPolicyAccount | ||
|
|
||
| isObserver, err := k.zetaObserverKeeper.IsAuthorized(ctx, msg.Creator, chain) | ||
| if err != nil { | ||
| ctx.Logger().Error("Error while checking if the account is an observer", err) | ||
| } | ||
| isProven := false | ||
| if !(isAdmin || isObserver) && msg.Proof != nil { | ||
| isProven, err = k.VerifyInTxTrackerProof(ctx, msg.Proof, msg.BlockHash, msg.TxIndex, msg.ChainId, msg.CoinType) | ||
| if err != nil { | ||
| return nil, types.ErrCannotVerifyProof.Wrapf(err.Error()) | ||
| } | ||
| } | ||
|
|
||
| // Sender needs to be either the admin policy account or an observer | ||
| if !(isAdmin || isObserver || isProven) { | ||
| return nil, errorsmod.Wrap(observerTypes.ErrNotAuthorized, fmt.Sprintf("Creator %s", msg.Creator)) | ||
| } | ||
|
|
||
| k.Keeper.SetInTxTracker(ctx, types.InTxTracker{ | ||
| ChainId: msg.ChainId, | ||
| TxHash: msg.TxHash, | ||
| CoinType: msg.CoinType, | ||
| }) | ||
| return &types.MsgAddToInTxTrackerResponse{}, nil | ||
| } | ||
|
|
||
| // https://github.com/zeta-chain/node/issues/1254 | ||
| func (k Keeper) VerifyInTxTrackerProof(ctx sdk.Context, proof *common.Proof, hash string, txIndex int64, chainID int64, coinType common.CoinType) (bool, error) { | ||
| if common.IsBitcoinChain(chainID) { | ||
| return false, fmt.Errorf("cannot verify proof for bitcoin chain %d", chainID) | ||
| } | ||
|
|
||
| senderChain := common.GetChainFromChainID(chainID) | ||
| if senderChain == nil { | ||
| return false, types.ErrUnsupportedChain | ||
| } | ||
|
|
||
| if !senderChain.IsProvable() { | ||
| return false, fmt.Errorf("chain %d does not support block header verification", chainID) | ||
| } | ||
|
|
||
| blockHash := eth.HexToHash(hash) | ||
| res, found := k.zetaObserverKeeper.GetBlockHeader(ctx, blockHash.Bytes()) | ||
| if !found { | ||
| return false, fmt.Errorf("block header not found %s", blockHash) | ||
| } | ||
|
|
||
| // verify and process the proof | ||
| val, err := proof.Verify(res.Header, int(txIndex)) | ||
| if err != nil && !common.IsErrorInvalidProof(err) { | ||
| return false, err | ||
| } | ||
| var txx ethtypes.Transaction | ||
| err = txx.UnmarshalBinary(val) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
|
|
||
| coreParams, found := k.zetaObserverKeeper.GetCoreParamsByChainID(ctx, senderChain.ChainId) | ||
| if !found { | ||
| return false, types.ErrUnsupportedChain.Wrapf("core params not found for chain %d", senderChain.ChainId) | ||
| } | ||
| tssRes, err := k.GetTssAddress(ctx, &types.QueryGetTssAddressRequest{}) | ||
| if err != nil { | ||
| return false, err | ||
| } | ||
| tssAddr := eth.HexToAddress(tssRes.Eth) | ||
| if tssAddr == (eth.Address{}) { | ||
| return false, fmt.Errorf("tss address not found") | ||
| } | ||
| if common.IsEVMChain(chainID) { | ||
| switch coinType { | ||
| case common.CoinType_Zeta: | ||
| if txx.To().Hex() != coreParams.ConnectorContractAddress { | ||
| return false, fmt.Errorf("receiver is not connector contract for coin type %s", coinType) | ||
| } | ||
| return true, nil | ||
| case common.CoinType_ERC20: | ||
| if txx.To().Hex() != coreParams.Erc20CustodyContractAddress { | ||
| return false, fmt.Errorf("receiver is not erc20Custory contract for coin type %s", coinType) | ||
| } | ||
| return true, nil | ||
| case common.CoinType_Gas: | ||
| if txx.To().Hex() != tssAddr.Hex() { | ||
| return false, fmt.Errorf("receiver is not tssAddress contract for coin type %s", coinType) | ||
| } | ||
| return true, nil | ||
| } | ||
| } | ||
|
|
||
| return false, fmt.Errorf("proof failed") | ||
| } |
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