status-go/protocol/contact.go

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package protocol
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import (
"crypto/ecdsa"
"github.com/status-im/status-go/eth-node/crypto"
"github.com/status-im/status-go/eth-node/types"
"github.com/status-im/status-go/images"
"github.com/status-im/status-go/protocol/identity/alias"
"github.com/status-im/status-go/protocol/identity/identicon"
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)
const (
contactBlocked = ":contact/blocked"
contactAdded = ":contact/added"
contactRequestReceived = ":contact/request-received"
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)
// ContactDeviceInfo is a struct containing information about a particular device owned by a contact
type ContactDeviceInfo struct {
// The installation id of the device
InstallationID string `json:"id"`
// Timestamp represents the last time we received this info
Timestamp int64 `json:"timestamp"`
// FCMToken is to be used for push notifications
FCMToken string `json:"fcmToken"`
}
// Contact has information about a "Contact". A contact is not necessarily one
// that we added or added us, that's based on SystemTags.
type Contact struct {
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// ID of the contact. It's a hex-encoded public key (prefixed with 0x).
ID string `json:"id"`
// Ethereum address of the contact
Address string `json:"address,omitempty"`
// ENS name of contact
Name string `json:"name,omitempty"`
// EnsVerified whether we verified the name of the contact
ENSVerified bool `json:"ensVerified"`
// Generated username name of the contact
Alias string `json:"alias,omitempty"`
// Identicon generated from public key
Identicon string `json:"identicon"`
// LastUpdated is the last time we received an update from the contact
// updates should be discarded if last updated is less than the one stored
LastUpdated uint64 `json:"lastUpdated"`
// SystemTags contains information about whether we blocked/added/have been
// added.
SystemTags []string `json:"systemTags"`
DeviceInfo []ContactDeviceInfo `json:"deviceInfo"`
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LocalNickname string `json:"localNickname,omitempty"`
Images map[string]images.IdentityImage `json:"images"`
}
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func (c Contact) PublicKey() (*ecdsa.PublicKey, error) {
b, err := types.DecodeHex(c.ID)
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if err != nil {
return nil, err
}
return crypto.UnmarshalPubkey(b)
}
func (c Contact) IsAdded() bool {
return existsInStringSlice(c.SystemTags, contactAdded)
}
func (c Contact) HasBeenAdded() bool {
return existsInStringSlice(c.SystemTags, contactRequestReceived)
}
func (c Contact) IsBlocked() bool {
return existsInStringSlice(c.SystemTags, contactBlocked)
}
func (c *Contact) Remove() {
var newSystemTags []string
// Remove the newSystemTags system-tag, so that the contact is
// not considered "added" anymore
for _, tag := range newSystemTags {
if tag != contactAdded {
newSystemTags = append(newSystemTags, tag)
}
}
c.SystemTags = newSystemTags
}
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// existsInStringSlice checks if a string is in a set.
func existsInStringSlice(set []string, find string) bool {
for _, s := range set {
if s == find {
return true
}
}
return false
}
func buildContactFromPkString(pkString string) (*Contact, error) {
publicKeyBytes, err := types.DecodeHex(pkString)
if err != nil {
return nil, err
}
publicKey, err := crypto.UnmarshalPubkey(publicKeyBytes)
if err != nil {
return nil, err
}
return buildContact(pkString, publicKey)
}
func buildContactFromPublicKey(publicKey *ecdsa.PublicKey) (*Contact, error) {
id := types.EncodeHex(crypto.FromECDSAPub(publicKey))
return buildContact(id, publicKey)
}
func buildContact(publicKeyString string, publicKey *ecdsa.PublicKey) (*Contact, error) {
identicon, err := identicon.GenerateBase64(publicKeyString)
if err != nil {
return nil, err
}
contact := &Contact{
ID: publicKeyString,
Alias: alias.GenerateFromPublicKey(publicKey),
Identicon: identicon,
}
return contact, nil
}
// HasCustomFields returns whether the the contact has any field that is valuable
// to the client other than the computed name/image
func (c Contact) HasCustomFields() bool {
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return c.IsAdded() || c.HasBeenAdded() || c.IsBlocked() || c.ENSVerified || c.LocalNickname != "" || len(c.Images) != 0
}
func contactIDFromPublicKey(key *ecdsa.PublicKey) string {
return types.EncodeHex(crypto.FromECDSAPub(key))
}