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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| package types | ||
|
|
||
| import ( | ||
| fmt "fmt" | ||
| "math/big" | ||
| "strings" | ||
|
|
||
| "github.com/ethereum/go-ethereum/accounts/abi" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| ) | ||
|
|
||
| // GmpDecoder is the payload sent from Axelar to IBC middleware. | ||
| // It needs to be decoded using the ABI. | ||
| type GmpDecoder struct { | ||
| AssetNames [][32]byte | ||
| ContractAddress common.Address | ||
| CommandSelector [4]byte | ||
| CommandParams []byte | ||
| Timestamp *big.Int | ||
| AbiEncodedData []byte | ||
| } | ||
|
|
||
| // abiSpec is the ABI specification for the GMP data. | ||
| var decoderSpec = abi.Arguments{ | ||
| { | ||
| Type: assetNamesType, | ||
| }, | ||
| { | ||
| Type: contractAddressType, | ||
| }, | ||
| { | ||
| Type: commandSelectorType, | ||
| }, | ||
| { | ||
| Type: commandParamsType, | ||
| }, | ||
| { | ||
| Type: timestampType, | ||
| }, | ||
| } | ||
|
|
||
| // NewGmpDecoder decodes a payload from GMP given a byte array | ||
| func NewGmpDecoder(payload []byte) (GmpDecoder, error) { | ||
| args, err := decoderSpec.Unpack(payload) | ||
| if err != nil { | ||
| return GmpDecoder{}, err | ||
| } | ||
|
|
||
| // check to make sure each argument is the correct type | ||
| if assetNames, ok := args[0].([][32]byte); !ok { | ||
| return GmpDecoder{}, fmt.Errorf("invalid asset names type: %T", args[0]) | ||
| } else if contractAddress, ok := args[1].(common.Address); !ok { | ||
| return GmpDecoder{}, fmt.Errorf("invalid contract address type: %T", args[1]) | ||
| } else if commandSelector, ok := args[2].([4]byte); !ok { | ||
| return GmpDecoder{}, fmt.Errorf("invalid command selector type: %T", args[2]) | ||
| } else if commandParams, ok := args[3].([]byte); !ok { | ||
| return GmpDecoder{}, fmt.Errorf("invalid command params type: %T", args[3]) | ||
| } else if timestamp, ok := args[4].(*big.Int); !ok { | ||
| return GmpDecoder{}, fmt.Errorf("invalid timestamp type: %T", args[4]) | ||
| } else { | ||
| return GmpDecoder{ | ||
| AssetNames: assetNames, | ||
| ContractAddress: contractAddress, | ||
| CommandSelector: commandSelector, | ||
| CommandParams: commandParams, | ||
| Timestamp: timestamp, | ||
| }, nil | ||
| } | ||
| } | ||
|
|
||
| func (g GmpDecoder) GetDenoms() []string { | ||
| denoms := make([]string, len(g.AssetNames)) | ||
| for i, name := range g.AssetNames { | ||
| denoms[i] = strings.TrimRight(string(name[:]), "\x00") | ||
| } | ||
| return denoms | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,53 @@ | ||
| package types | ||
|
|
||
| import ( | ||
| "math/big" | ||
| "testing" | ||
|
|
||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/stretchr/testify/require" | ||
| ) | ||
|
|
||
| // TestGmpData tests the GmpData struct by encoding and decoding it. | ||
| func TestGmpData(t *testing.T) { | ||
| g := GmpDecoder{ | ||
| AssetNames: [][32]byte{{1}}, | ||
| ContractAddress: common.HexToAddress("0x0000001"), | ||
| CommandSelector: [4]byte{1}, | ||
| CommandParams: []byte{1}, | ||
| Timestamp: big.NewInt(1), | ||
| } | ||
| payload, err := decoderSpec.Pack( | ||
| g.AssetNames, | ||
| g.ContractAddress, | ||
| g.CommandSelector, | ||
| g.CommandParams, | ||
| g.Timestamp, | ||
| ) | ||
| require.NoError(t, err) | ||
| newGmpData, err := NewGmpDecoder(payload) | ||
| require.NoError(t, err) | ||
|
|
||
| require.Equal(t, g, newGmpData) | ||
| } | ||
|
|
||
| func TestGetDenoms(t *testing.T) { | ||
| assetNamesString := []string{ | ||
| "BTC", | ||
| "ETH", | ||
| "USDT", | ||
| "BNB", | ||
| "ADA", | ||
| "FOOBARFOOBARFOOBARFOOBARFOOBARFO", // maxmimum allowed length | ||
| } | ||
| assetNamesAsBytes := make([][32]byte, len(assetNamesString)) | ||
| for i, name := range assetNamesString { | ||
| copy(assetNamesAsBytes[i][:], name) | ||
| } | ||
|
|
||
| g := GmpDecoder{ | ||
| AssetNames: assetNamesAsBytes, | ||
| } | ||
| denoms := g.GetDenoms() | ||
| require.Equal(t, assetNamesString, denoms) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| package types | ||
|
|
||
| import ( | ||
| "math/big" | ||
|
|
||
| "github.com/ethereum/go-ethereum/accounts/abi" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| ) | ||
|
|
||
| // GmpEncoder is the struct we use to encode the data we want to send to the GMP. | ||
| type GmpEncoder struct { | ||
| PriceData []PriceData | ||
| AssetNames [32]byte | ||
| ContractAddress common.Address | ||
| CommandSelector [4]byte | ||
| CommandParams []byte | ||
| } | ||
|
|
||
| // MedianData is the struct that represents the MedianData tuple in Solidity. | ||
| type MedianData struct { | ||
| BlockNums []*big.Int | ||
| Medians []*big.Int | ||
| Deviations []*big.Int | ||
| } | ||
|
|
||
| // PriceData is the struct that represents the PriceData tuple in Solidity. | ||
| type PriceData struct { | ||
| AssetName [32]byte | ||
| Price *big.Int | ||
| ResolveTime *big.Int | ||
| MedianData []MedianData | ||
| } | ||
|
|
||
| // encoderSpec is the ABI specification for the GMP data. | ||
| var encoderSpec = abi.Arguments{ | ||
| { | ||
| Type: priceDataType, | ||
| }, | ||
| { | ||
| Type: assetNameType, | ||
| }, | ||
| { | ||
| Type: contractAddressType, | ||
| }, | ||
| { | ||
| Type: commandSelectorType, | ||
| }, | ||
| { | ||
| Type: commandParamsType, | ||
| }, | ||
| } | ||
|
|
||
| // GMPEncode encodes the GMP data into a byte array. | ||
| func (g GmpEncoder) GMPEncode() ([]byte, error) { | ||
| return encoderSpec.Pack(g.PriceData, g.AssetNames, g.ContractAddress, g.CommandSelector, g.CommandParams) | ||
| } |
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