From a69a59c6014566344c1c102099baa192dd6e0a7c Mon Sep 17 00:00:00 2001
From: Anthony Laibe <491074+alaibe@users.noreply.github.com>
Date: Mon, 24 Oct 2022 12:07:44 +0200
Subject: [PATCH] feat: add reverse lookup for ens (#2912)

---
 contracts/contracts.go   | 17 ++++++++++-------
 services/ens/api.go      |  9 +++++++++
 services/ens/api_test.go | 10 ++++++++++
 3 files changed, 29 insertions(+), 7 deletions(-)

diff --git a/contracts/contracts.go b/contracts/contracts.go
index fdc43d6b3..0cab96ab6 100644
--- a/contracts/contracts.go
+++ b/contracts/contracts.go
@@ -19,23 +19,26 @@ type ContractMaker struct {
 	RPCClient *rpc.Client
 }
 
-func (c *ContractMaker) NewRegistry(chainID uint64) (*resolver.ENSRegistryWithFallback, error) {
-	contractAddr, err := resolver.ContractAddress(chainID)
-	if err != nil {
-		return nil, err
-	}
-
+func (c *ContractMaker) NewRegistryWithAddress(chainID uint64, address common.Address) (*resolver.ENSRegistryWithFallback, error) {
 	backend, err := c.RPCClient.EthClient(chainID)
 	if err != nil {
 		return nil, err
 	}
 
 	return resolver.NewENSRegistryWithFallback(
-		contractAddr,
+		address,
 		backend,
 	)
 }
 
+func (c *ContractMaker) NewRegistry(chainID uint64) (*resolver.ENSRegistryWithFallback, error) {
+	contractAddr, err := resolver.ContractAddress(chainID)
+	if err != nil {
+		return nil, err
+	}
+	return c.NewRegistryWithAddress(chainID, contractAddr)
+}
+
 func (c *ContractMaker) NewPublicResolver(chainID uint64, resolverAddress *common.Address) (*resolver.PublicResolver, error) {
 	backend, err := c.RPCClient.EthClient(chainID)
 	if err != nil {
diff --git a/services/ens/api.go b/services/ens/api.go
index e1ecd908f..614a75ed2 100644
--- a/services/ens/api.go
+++ b/services/ens/api.go
@@ -14,6 +14,7 @@ import (
 	"github.com/multiformats/go-multibase"
 	"github.com/multiformats/go-multihash"
 	"github.com/pkg/errors"
+	"github.com/wealdtech/go-ens/v3"
 	"github.com/wealdtech/go-multicodec"
 
 	"github.com/ethereum/go-ethereum"
@@ -98,6 +99,14 @@ func (api *API) Resolver(ctx context.Context, chainID uint64, username string) (
 	return &resolver, nil
 }
 
+func (api *API) GetName(ctx context.Context, chainID uint64, address common.Address) (string, error) {
+	backend, err := api.contractMaker.RPCClient.EthClient(chainID)
+	if err != nil {
+		return "", err
+	}
+	return ens.ReverseResolve(backend, address)
+}
+
 func (api *API) OwnerOf(ctx context.Context, chainID uint64, username string) (*common.Address, error) {
 	err := validateENSUsername(username)
 	if err != nil {
diff --git a/services/ens/api_test.go b/services/ens/api_test.go
index 0eb5b0e2a..a51d7cbb8 100644
--- a/services/ens/api_test.go
+++ b/services/ens/api_test.go
@@ -10,6 +10,7 @@ import (
 	"github.com/golang/mock/gomock"
 	"github.com/stretchr/testify/require"
 
+	"github.com/ethereum/go-ethereum/common"
 	gethrpc "github.com/ethereum/go-ethereum/rpc"
 	"github.com/status-im/status-go/appdatabase"
 	"github.com/status-im/status-go/params"
@@ -67,6 +68,15 @@ func TestResolver(t *testing.T) {
 	require.Equal(t, "0x4976fb03C32e5B8cfe2b6cCB31c09Ba78EBaBa41", r.String())
 }
 
+func TestGetName(t *testing.T) {
+	api, cancel := setupTestAPI(t)
+	defer cancel()
+
+	r, err := api.GetName(context.Background(), 1, common.HexToAddress("0x7d28Ab6948F3Db2F95A43742265D382a4888c120"))
+	require.NoError(t, err)
+	require.Equal(t, "rramos.eth", r)
+}
+
 func TestOwnerOf(t *testing.T) {
 	api, cancel := setupTestAPI(t)
 	defer cancel()