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intents: add eip712 support via new IntentDataSignTypedData (#180)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| package intents | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "fmt" | ||
| "math/big" | ||
|
|
||
| "github.com/0xsequence/ethkit/go-ethereum/common" | ||
| "github.com/0xsequence/go-sequence" | ||
| ) | ||
|
|
||
| func (p *IntentDataSignTypedData) chainID() (*big.Int, error) { | ||
| n, ok := sequence.ParseHexOrDec(p.Network) | ||
| if !ok { | ||
| return nil, fmt.Errorf("invalid network id '%s'", p.Network) | ||
| } | ||
| return n, nil | ||
| } | ||
|
|
||
| func (p *IntentDataSignTypedData) message() ([]byte, error) { | ||
| // typedData, ok := p.TypedData.(*ethcoder.TypedData) | ||
| // if !ok { | ||
| // return nil, fmt.Errorf("typedData field is not a valid typed data object") | ||
| // } | ||
|
|
||
| _, encodedMessage, err := p.TypedData.Encode() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return encodedMessage, nil | ||
| } | ||
|
|
||
| func (p *IntentDataSignTypedData) wallet() common.Address { | ||
| return common.HexToAddress(p.Wallet) | ||
| } | ||
|
|
||
| func (p *IntentDataSignTypedData) subdigest() ([]byte, error) { | ||
| chainID, err := p.chainID() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| msgData, err := p.message() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return sequence.SubDigest(chainID, p.wallet(), sequence.MessageDigest(msgData)) | ||
| } | ||
|
|
||
| func (p *IntentDataSignTypedData) IsValidInterpretation(subdigest common.Hash) bool { | ||
| selfSubDigest, err := p.subdigest() | ||
| if err != nil { | ||
| return false | ||
| } | ||
|
|
||
| return bytes.Equal(selfSubDigest, subdigest[:]) | ||
| } | ||
|
|
||
| // func (p *IntentDataSignTypedData) UnmarshalJSON(data []byte) error { | ||
| // type Raw struct { | ||
| // Network string `json:"network"` | ||
| // Wallet string `json:"wallet"` | ||
| // TypedData json.RawMessage `json:"typedData"` | ||
| // } | ||
|
|
||
| // dec := json.NewDecoder(bytes.NewReader(data)) | ||
| // var raw Raw | ||
| // if err := dec.Decode(&raw); err != nil { | ||
| // return err | ||
| // } | ||
|
|
||
| // typedData, err := ethcoder.TypedDataFromJSON(string(raw.TypedData)) | ||
| // if err != nil { | ||
| // return err | ||
| // } | ||
|
|
||
| // p.Network = raw.Network | ||
| // p.Wallet = raw.Wallet | ||
| // p.TypedData = typedData | ||
| // return nil | ||
| // } |
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