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utils.go
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/
utils.go
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package common
import (
"crypto/ecdsa"
"errors"
"regexp"
"strings"
"github.com/status-im/status-go/eth-node/crypto"
"github.com/status-im/status-go/protocol/identity/alias"
"github.com/status-im/status-go/protocol/protobuf"
)
var ErrInvalidDisplayNameRegExp = errors.New("only letters, numbers, underscores and hyphens allowed")
var ErrInvalidDisplayNameEthSuffix = errors.New(`usernames ending with "eth" are not allowed`)
var ErrInvalidDisplayNameNotAllowed = errors.New("name is not allowed")
func RecoverKey(m *protobuf.ApplicationMetadataMessage) (*ecdsa.PublicKey, error) {
if m.Signature == nil {
return nil, nil
}
recoveredKey, err := crypto.SigToPub(
crypto.Keccak256(m.Payload),
m.Signature,
)
if err != nil {
return nil, err
}
return recoveredKey, nil
}
func ValidateDisplayName(displayName *string) error {
name := strings.TrimSpace(*displayName)
*displayName = name
if name == "" {
return nil
}
// ^[\\w-\\s]{5,24}$ to allow spaces
if match, _ := regexp.MatchString("^[\\w-\\s]{5,24}$", name); !match {
return ErrInvalidDisplayNameRegExp
}
// .eth should not happen due to the regexp above, but let's keep it here in case the regexp is changed in the future
if strings.HasSuffix(name, "_eth") || strings.HasSuffix(name, ".eth") || strings.HasSuffix(name, "-eth") {
return ErrInvalidDisplayNameEthSuffix
}
if alias.IsAlias(name) {
return ErrInvalidDisplayNameNotAllowed
}
return nil
}