mirror of
https://github.com/status-im/status-go.git
synced 2025-01-09 06:12:55 +00:00
db786ef1d2
* Implement EIP 712 * Cover majority of cases with tests * Add solidity and signer tests and cover integer edges case * Add thin api to sign type data using selected status account * All integers are extended to int256 and marshalled into big.Int * Document how deps works * Fix linter * Fix errors test * Add validation tests * Unmarshal every atomic type in separate functions
87 lines
2.3 KiB
Go
87 lines
2.3 KiB
Go
package typeddata
|
|
|
|
import (
|
|
"encoding/json"
|
|
"errors"
|
|
"fmt"
|
|
"math/big"
|
|
)
|
|
|
|
const (
|
|
eip712Domain = "EIP712Domain"
|
|
chainIDKey = "chainId"
|
|
)
|
|
|
|
// Types define fields for each composite type.
|
|
type Types map[string][]Field
|
|
|
|
// Field stores name and solidity type of the field.
|
|
type Field struct {
|
|
Name string `json:"name"`
|
|
Type string `json:"type"`
|
|
}
|
|
|
|
// Validate checks that both name and type are not empty.
|
|
func (f Field) Validate() error {
|
|
if len(f.Name) == 0 {
|
|
return errors.New("`name` is required")
|
|
}
|
|
if len(f.Type) == 0 {
|
|
return errors.New("`type` is required")
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// TypedData defines typed data according to eip-712.
|
|
type TypedData struct {
|
|
Types Types `json:"types"`
|
|
PrimaryType string `json:"primaryType"`
|
|
Domain map[string]json.RawMessage `json:"domain"`
|
|
Message map[string]json.RawMessage `json:"message"`
|
|
}
|
|
|
|
// Validate that required fields are defined.
|
|
// This method doesn't check if dependencies of the main type are defined, it will be validated
|
|
// when type string is computed.
|
|
func (t TypedData) Validate() error {
|
|
if _, exist := t.Types[eip712Domain]; !exist {
|
|
return fmt.Errorf("`%s` must be in `types`", eip712Domain)
|
|
}
|
|
if t.PrimaryType == "" {
|
|
return errors.New("`primaryType` is required")
|
|
}
|
|
if _, exist := t.Types[t.PrimaryType]; !exist {
|
|
return fmt.Errorf("primary type `%s` not defined in types", t.PrimaryType)
|
|
}
|
|
if t.Domain == nil {
|
|
return errors.New("`domain` is required")
|
|
}
|
|
if t.Message == nil {
|
|
return errors.New("`message` is required")
|
|
}
|
|
for typ := range t.Types {
|
|
fields := t.Types[typ]
|
|
for i := range fields {
|
|
if err := fields[i].Validate(); err != nil {
|
|
return fmt.Errorf("field %d from type `%s` is invalid: %v", i, typ, err)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ValidateChainID accept chain as big integer and verifies if typed data belongs to the same chain.
|
|
func (t TypedData) ValidateChainID(chain *big.Int) error {
|
|
if _, exist := t.Domain[chainIDKey]; !exist {
|
|
return fmt.Errorf("domain misses chain key %s", chainIDKey)
|
|
}
|
|
var chainID int64
|
|
if err := json.Unmarshal(t.Domain[chainIDKey], &chainID); err != nil {
|
|
return err
|
|
}
|
|
if chainID != chain.Int64() {
|
|
return fmt.Errorf("chainId %d doesn't match selected chain %s", chainID, chain)
|
|
}
|
|
return nil
|
|
}
|