87 lines
1.9 KiB
Go
87 lines
1.9 KiB
Go
package common
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import (
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"crypto/ecdsa"
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"errors"
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"reflect"
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"regexp"
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"strings"
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"github.com/status-im/status-go/eth-node/crypto"
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"github.com/status-im/status-go/protocol/identity/alias"
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"github.com/status-im/status-go/protocol/protobuf"
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)
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var ErrInvalidDisplayNameRegExp = errors.New("only letters, numbers, underscores and hyphens allowed")
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var ErrInvalidDisplayNameEthSuffix = errors.New(`usernames ending with "eth" are not allowed`)
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var ErrInvalidDisplayNameNotAllowed = errors.New("name is not allowed")
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var DISPLAY_NAME_EXT = []string{"_eth", ".eth", "-eth"}
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func RecoverKey(m *protobuf.ApplicationMetadataMessage) (*ecdsa.PublicKey, error) {
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if m.Signature == nil {
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return nil, nil
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}
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recoveredKey, err := crypto.SigToPub(
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crypto.Keccak256(m.Payload),
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m.Signature,
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)
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if err != nil {
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return nil, err
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}
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return recoveredKey, nil
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}
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func ValidateDisplayName(displayName *string) error {
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name := strings.TrimSpace(*displayName)
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*displayName = name
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if name == "" {
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return nil
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}
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// ^[\\w-\\s]{5,24}$ to allow spaces
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if match, _ := regexp.MatchString("^[\\w-\\s]{5,24}$", name); !match {
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return ErrInvalidDisplayNameRegExp
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}
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// .eth should not happen due to the regexp above, but let's keep it here in case the regexp is changed in the future
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for _, ext := range DISPLAY_NAME_EXT {
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if strings.HasSuffix(*displayName, ext) {
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return ErrInvalidDisplayNameEthSuffix
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}
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}
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if alias.IsAlias(name) {
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return ErrInvalidDisplayNameNotAllowed
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}
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return nil
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}
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// implementation referenced from https://github.com/embarklabs/embark/blob/master/packages/plugins/ens/src/index.js
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func IsENSName(displayName string) bool {
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if len(displayName) == 0 {
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return false
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}
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if strings.HasSuffix(displayName, ".eth") {
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return true
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}
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return false
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}
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func IsNil(i interface{}) bool {
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if i == nil {
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return true
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}
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switch reflect.TypeOf(i).Kind() {
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case reflect.Ptr, reflect.Interface:
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return reflect.ValueOf(i).IsNil()
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}
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return false
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}
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