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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| package evm | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "math/big" | ||
|
|
||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| "github.com/ethereum/go-ethereum/accounts/abi" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| geth "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/ethereum/go-ethereum/crypto" | ||
|
|
||
| "github.com/axelarnetwork/axelar-core/x/evm/types" | ||
| nexus "github.com/axelarnetwork/axelar-core/x/nexus/exported" | ||
| "github.com/axelarnetwork/utils/funcs" | ||
| "github.com/axelarnetwork/utils/slices" | ||
| ) | ||
|
|
||
| // Smart contract event signatures | ||
| var ( | ||
| ERC20TransferSig = crypto.Keccak256Hash([]byte("Transfer(address,address,uint256)")) | ||
| ERC20TokenDeploymentSig = crypto.Keccak256Hash([]byte("TokenDeployed(string,address)")) | ||
| MultisigTransferOperatorshipSig = crypto.Keccak256Hash([]byte("OperatorshipTransferred(bytes)")) | ||
| ContractCallSig = crypto.Keccak256Hash([]byte("ContractCall(address,string,string,bytes32,bytes)")) | ||
| ContractCallWithTokenSig = crypto.Keccak256Hash([]byte("ContractCallWithToken(address,string,string,bytes32,bytes,string,uint256)")) | ||
| TokenSentSig = crypto.Keccak256Hash([]byte("TokenSent(address,string,string,string,uint256)")) | ||
| ) | ||
|
|
||
| func DecodeERC20TransferEvent(log *geth.Log) (types.EventTransfer, error) { | ||
| if len(log.Topics) != 3 || log.Topics[0] != ERC20TransferSig { | ||
| return types.EventTransfer{}, fmt.Errorf("log is not an ERC20 transfer") | ||
| } | ||
|
|
||
| uint256Type := funcs.Must(abi.NewType("uint256", "uint256", nil)) | ||
|
|
||
| to := common.BytesToAddress(log.Topics[2][:]) | ||
|
|
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| arguments := abi.Arguments{ | ||
| {Type: uint256Type}, | ||
| } | ||
|
|
||
| params, err := arguments.Unpack(log.Data) | ||
| if err != nil { | ||
| return types.EventTransfer{}, err | ||
| } | ||
|
|
||
| return types.EventTransfer{ | ||
| To: types.Address(to), | ||
| Amount: sdk.NewUintFromBigInt(params[0].(*big.Int)), | ||
| }, nil | ||
| } | ||
|
|
||
| func DecodeERC20TokenDeploymentEvent(log *geth.Log) (types.EventTokenDeployed, error) { | ||
| if len(log.Topics) != 1 || log.Topics[0] != ERC20TokenDeploymentSig { | ||
| return types.EventTokenDeployed{}, fmt.Errorf("event is not for an ERC20 token deployment") | ||
| } | ||
|
|
||
| stringType := funcs.Must(abi.NewType("string", "string", nil)) | ||
| addressType := funcs.Must(abi.NewType("address", "address", nil)) | ||
|
|
||
| arguments := abi.Arguments{{Type: stringType}, {Type: addressType}} | ||
| params, err := types.StrictDecode(arguments, log.Data) | ||
| if err != nil { | ||
| return types.EventTokenDeployed{}, err | ||
| } | ||
|
|
||
| return types.EventTokenDeployed{ | ||
| Symbol: params[0].(string), | ||
| TokenAddress: types.Address(params[1].(common.Address)), | ||
| }, nil | ||
| } | ||
|
|
||
| func DecodeMultisigOperatorshipTransferredEvent(log *geth.Log) (types.EventMultisigOperatorshipTransferred, error) { | ||
| if len(log.Topics) != 1 || log.Topics[0] != MultisigTransferOperatorshipSig { | ||
| return types.EventMultisigOperatorshipTransferred{}, fmt.Errorf("event is not OperatorshipTransferred") | ||
| } | ||
|
|
||
| bytesType := funcs.Must(abi.NewType("bytes", "bytes", nil)) | ||
| newOperatorsData, err := types.StrictDecode(abi.Arguments{{Type: bytesType}}, log.Data) | ||
| if err != nil { | ||
| return types.EventMultisigOperatorshipTransferred{}, err | ||
| } | ||
|
|
||
| addressesType := funcs.Must(abi.NewType("address[]", "address[]", nil)) | ||
| uint256ArrayType := funcs.Must(abi.NewType("uint256[]", "uint256[]", nil)) | ||
| uint256Type := funcs.Must(abi.NewType("uint256", "uint256", nil)) | ||
|
|
||
| arguments := abi.Arguments{{Type: addressesType}, {Type: uint256ArrayType}, {Type: uint256Type}} | ||
| params, err := types.StrictDecode(arguments, newOperatorsData[0].([]byte)) | ||
| if err != nil { | ||
| return types.EventMultisigOperatorshipTransferred{}, err | ||
| } | ||
|
|
||
| event := types.EventMultisigOperatorshipTransferred{ | ||
| NewOperators: slices.Map(params[0].([]common.Address), func(addr common.Address) types.Address { return types.Address(addr) }), | ||
| NewWeights: slices.Map(params[1].([]*big.Int), sdk.NewUintFromBigInt), | ||
| NewThreshold: sdk.NewUintFromBigInt(params[2].(*big.Int)), | ||
| } | ||
|
|
||
| return event, nil | ||
| } | ||
|
|
||
| func DecodeEventContractCallWithToken(log *geth.Log) (types.EventContractCallWithToken, error) { | ||
| stringType := funcs.Must(abi.NewType("string", "string", nil)) | ||
| bytesType := funcs.Must(abi.NewType("bytes", "bytes", nil)) | ||
| uint256Type := funcs.Must(abi.NewType("uint256", "uint256", nil)) | ||
|
|
||
| arguments := abi.Arguments{ | ||
| {Type: stringType}, | ||
| {Type: stringType}, | ||
| {Type: bytesType}, | ||
| {Type: stringType}, | ||
| {Type: uint256Type}, | ||
| } | ||
| params, err := types.StrictDecode(arguments, log.Data) | ||
| if err != nil { | ||
| return types.EventContractCallWithToken{}, err | ||
| } | ||
|
|
||
| return types.EventContractCallWithToken{ | ||
| Sender: types.Address(common.BytesToAddress(log.Topics[1].Bytes())), | ||
| DestinationChain: nexus.ChainName(params[0].(string)), | ||
| ContractAddress: params[1].(string), | ||
| PayloadHash: types.Hash(common.BytesToHash(log.Topics[2].Bytes())), | ||
| Symbol: params[3].(string), | ||
| Amount: sdk.NewUintFromBigInt(params[4].(*big.Int)), | ||
| }, nil | ||
| } | ||
|
|
||
| func DecodeEventTokenSent(log *geth.Log) (types.EventTokenSent, error) { | ||
| stringType := funcs.Must(abi.NewType("string", "string", nil)) | ||
| uint256Type := funcs.Must(abi.NewType("uint256", "uint256", nil)) | ||
|
|
||
| arguments := abi.Arguments{ | ||
| {Type: stringType}, | ||
| {Type: stringType}, | ||
| {Type: stringType}, | ||
| {Type: uint256Type}, | ||
| } | ||
| params, err := types.StrictDecode(arguments, log.Data) | ||
| if err != nil { | ||
| return types.EventTokenSent{}, err | ||
| } | ||
|
|
||
| return types.EventTokenSent{ | ||
| Sender: types.Address(common.BytesToAddress(log.Topics[1].Bytes())), | ||
| DestinationChain: nexus.ChainName(params[0].(string)), | ||
| DestinationAddress: params[1].(string), | ||
| Symbol: params[2].(string), | ||
| Amount: sdk.NewUintFromBigInt(params[3].(*big.Int)), | ||
| }, nil | ||
| } | ||
|
|
||
| func DecodeEventContractCall(log *geth.Log) (types.EventContractCall, error) { | ||
| stringType := funcs.Must(abi.NewType("string", "string", nil)) | ||
| bytesType := funcs.Must(abi.NewType("bytes", "bytes", nil)) | ||
|
|
||
| arguments := abi.Arguments{ | ||
| {Type: stringType}, | ||
| {Type: stringType}, | ||
| {Type: bytesType}, | ||
| } | ||
| params, err := types.StrictDecode(arguments, log.Data) | ||
| if err != nil { | ||
| return types.EventContractCall{}, err | ||
| } | ||
|
|
||
| return types.EventContractCall{ | ||
| Sender: types.Address(common.BytesToAddress(log.Topics[1].Bytes())), | ||
| DestinationChain: nexus.ChainName(params[0].(string)), | ||
| ContractAddress: params[1].(string), | ||
| PayloadHash: types.Hash(common.BytesToHash(log.Topics[2].Bytes())), | ||
| }, nil | ||
| } |
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