[wallet] Add wallet_getChachedBalances method

VERSION

@@ -1 +1 @@
-0.79.3
+0.79.4

protocol/urls/urls.go

@@ -74,11 +74,11 @@ func LinkPreviewWhitelist() []Site {
 			Address:   "youtu.be",
 			ImageSite: false,
 		},
-		Site{
+		// Site{
-			Title:     "Tenor GIFs",
+		// 	Title:     "Tenor GIFs",
-			Address:   "tenor.com",
+		// 	Address:   "tenor.com",
-			ImageSite: true,
+		// 	ImageSite: true,
-		},
+		// },
 		Site{
 			Title:     "GIPHY GIFs shortener",
 			Address:   "gph.is",

protocol/urls/urls_test.go

@@ -97,28 +97,28 @@ func TestGetGiphyShortURLPreviewData(t *testing.T) {
 	require.Equal(t, bostonDynamicsEthGifData.Title, previewData.Title)
 }
 
-func TestGetTenorPreviewData(t *testing.T) {
+// func TestGetTenorPreviewData(t *testing.T) {
-	validTenorLink := "https://tenor.com/view/robot-dance-do-you-love-me-boston-boston-dynamics-dance-gif-19998728"
+// 	validTenorLink := "https://tenor.com/view/robot-dance-do-you-love-me-boston-boston-dynamics-dance-gif-19998728"
-	previewData, err := GetTenorPreviewData(validTenorLink)
+// 	previewData, err := GetTenorPreviewData(validTenorLink)
 
-	gifData := LinkPreviewData{
+// 	gifData := LinkPreviewData{
-		Site:         "Tenor",
+// 		Site:         "Tenor",
-		Title:        "Annihere",
+// 		Title:        "Annihere",
-		ThumbnailURL: "https://media.tenor.com/images/975f6b95d188c277ebba62d9b5511685/tenor.gif",
+// 		ThumbnailURL: "https://media.tenor.com/images/975f6b95d188c277ebba62d9b5511685/tenor.gif",
-		Height:       400,
+// 		Height:       400,
-		Width:        600,
+// 		Width:        600,
-	}
+// 	}
-	require.NoError(t, err)
+// 	require.NoError(t, err)
-	require.Equal(t, gifData.Site, previewData.Site)
+// 	require.Equal(t, gifData.Site, previewData.Site)
-	require.Equal(t, gifData.Title, previewData.Title)
+// 	require.Equal(t, gifData.Title, previewData.Title)
-	require.Equal(t, gifData.ThumbnailURL, previewData.ThumbnailURL)
+// 	require.Equal(t, gifData.ThumbnailURL, previewData.ThumbnailURL)
-	require.Equal(t, gifData.Height, previewData.Height)
+// 	require.Equal(t, gifData.Height, previewData.Height)
-	require.Equal(t, gifData.Width, previewData.Width)
+// 	require.Equal(t, gifData.Width, previewData.Width)
 
-	invalidTenorLink := "https://giphy.com/gifs/this-gif-does-not-exist-44444"
+// 	invalidTenorLink := "https://giphy.com/gifs/this-gif-does-not-exist-44444"
-	_, err = GetTenorPreviewData(invalidTenorLink)
+// 	_, err = GetTenorPreviewData(invalidTenorLink)
-	require.Error(t, err)
+// 	require.Error(t, err)
-}
+// }
 
 func TestStatusLinkPreviewData(t *testing.T) {
 

services/wallet/api.go

@@ -238,3 +238,34 @@ func (api *API) CheckRecentHistory(ctx context.Context, addresses []common.Addre
 		addresses,
 		new(big.Int).SetUint64(api.s.db.network))
 }
+
+type LastKnownBlockView struct {
+	Address common.Address `json:"address"`
+	Number  *big.Int       `json:"blockNumber"`
+	Balance BigInt         `json:"balance"`
+	Nonce   *int64         `json:"nonce"`
+}
+
+func blocksToViews(blocks map[common.Address]*LastKnownBlock) []LastKnownBlockView {
+	blocksViews := []LastKnownBlockView{}
+	for address, block := range blocks {
+		view := LastKnownBlockView{
+			Address: address,
+			Number:  block.Number,
+			Balance: BigInt{block.Balance},
+			Nonce:   block.Nonce,
+		}
+		blocksViews = append(blocksViews, view)
+	}
+
+	return blocksViews
+}
+
+func (api *API) GetCachedBalances(ctx context.Context, addresses []common.Address) ([]LastKnownBlockView, error) {
+	result, error := api.s.db.getLastKnownBalances(addresses)
+	if error != nil {
+		return nil, error
+	}
+
+	return blocksToViews(result), nil
+}

services/wallet/database.go

@@ -433,6 +433,22 @@ func (db *Database) GetLastKnownBlockByAddress(address common.Address) (block *L
 	return nil, nil
 }
 
+func (db *Database) getLastKnownBalances(addresses []common.Address) (map[common.Address]*LastKnownBlock, error) {
+	result := map[common.Address]*LastKnownBlock{}
+	for _, address := range addresses {
+		block, error := db.GetLastKnownBlockByAddress(address)
+		if error != nil {
+			return nil, error
+		}
+
+		if block != nil {
+			result[address] = block
+		}
+	}
+
+	return result, nil
+}
+
 func (db *Database) GetLastKnownBlockByAddresses(addresses []common.Address) (map[common.Address]*LastKnownBlock, []common.Address, error) {
 	res := map[common.Address]*LastKnownBlock{}
 	accountsWithoutHistory := []common.Address{}
@@ -785,8 +801,8 @@ func insertBlocksWithTransactions(creator statementCreator, account common.Addre
 	if err != nil {
 		return err
 	}
-	updateTx, err := creator.Prepare(`UPDATE transfers 
+	updateTx, err := creator.Prepare(`UPDATE transfers
-	SET log = ? 
+	SET log = ?
 	WHERE network_id = ? AND address = ? AND hash = ?`)
 	if err != nil {
 		return err