Sohail/latest token transactions (#21)

* add: latest-token-transactions table

* fix: remove token symbol from query

* fix: move latest tx to dashboard domain

internal/dashboard/api.go

@@ -28,4 +28,5 @@ func InitDashboardApi(e *echo.Echo, db *pgxpool.Pool, queries goyesql.Queries) {
 	g.GET("/transactions-count", handleTransactionsCount)
 	g.GET("/token-transactions-count/:address", handleTokenTransactionsCount)
 	g.GET("/token-volume/:address", handleTokenVolume)
+	g.GET("/latest-token-transactions/:address", handleLatestTokenTransactions)
 }

internal/dashboard/charts.go

@@ -1,6 +1,7 @@
 package dashboard
 
 import (
+	"cic-dw/pkg/date_range"
 	"context"
 	"net/http"
 	"time"
@@ -21,7 +22,7 @@ func handleNewRegistrations(c echo.Context) error {
 		data []lineChartRes
 	)
 
-	from, to := parseDateRange(c.QueryParams())
+	from, to := date_range.ParseDateRange(c.QueryParams())
 
 	rows, err := api.db.Query(context.Background(), api.q["new-user-registrations"], from, to)
 	if err != nil {
@@ -42,7 +43,7 @@ func handleTransactionsCount(c echo.Context) error {
 		data []lineChartRes
 	)
 
-	from, to := parseDateRange(c.QueryParams())
+	from, to := date_range.ParseDateRange(c.QueryParams())
 
 	rows, err := api.db.Query(context.Background(), api.q["transactions-count"], from, to)
 	if err != nil {
@@ -64,7 +65,7 @@ func handleTokenTransactionsCount(c echo.Context) error {
 		data []lineChartRes
 	)
 
-	from, to := parseDateRange(c.QueryParams())
+	from, to := date_range.ParseDateRange(c.QueryParams())
 
 	rows, err := api.db.Query(context.Background(), api.q["token-transactions-count"], from, to, token)
 	if err != nil {
@@ -86,7 +87,7 @@ func handleTokenVolume(c echo.Context) error {
 		data []lineChartRes
 	)
 
-	from, to := parseDateRange(c.QueryParams())
+	from, to := date_range.ParseDateRange(c.QueryParams())
 
 	rows, err := api.db.Query(context.Background(), api.q["token-volume"], from, to, token)
 	if err != nil {

internal/dashboard/transactions.go

@@ -0,0 +1,45 @@
+package dashboard
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/georgysavva/scany/pgxscan"
+	"github.com/labstack/echo/v4"
+)
+
+type tokenTransactionsRes struct {
+	Id      int64     `db:"id" json:"id"`
+	Block   int64     `db:"block_number" json:"block"`
+	Date    time.Time `db:"date_block" json:"time"`
+	TxHash  string    `db:"tx_hash" json:"tx_hash"`
+	From    string    `db:"sender_address" json:"from"`
+	To      string    `db:"recipient_address" json:"to"`
+	Value   int64     `db:"tx_value" json:"tx_value"`
+	Success bool      `db:"success" json:"success"`
+}
+
+func handleLatestTokenTransactions(c echo.Context) error {
+	var (
+		api   = c.Get("api").(*api)
+		token = c.Param("address")
+
+		data []tokenTransactionsRes
+	)
+
+	rows, err := api.db.Query(context.Background(), api.q["latest-token-transactions"], token)
+	if err != nil {
+		return err
+	}
+
+	if err := pgxscan.ScanAll(&data, rows); err != nil {
+		return err
+	}
+
+	if len(data) < 1 {
+		data = []tokenTransactionsRes{}
+	}
+
+	return c.JSON(http.StatusOK, data)
+}

pkg/date_range/date_range.go

@@ -1,11 +1,12 @@
-package dashboard
+package date_range
 
 import (
-	"github.com/golang-module/carbon/v2"
 	"net/url"
+
+	"github.com/golang-module/carbon/v2"
 )
 
-func parseDateRange(q url.Values) (string, string) {
+func ParseDateRange(q url.Values) (string, string) {
 	var from, to string
 
 	qFrom := q.Get("from")

queries/dashboard.sql

@@ -69,3 +69,8 @@ AND transactions.success = true
 GROUP BY date_range.day
 ORDER BY date_range.day
 LIMIT 730;
+
+--name: latest-token-transactions
+-- Returns latest token transactions, with curosr forward query and limit
+SELECT id, block_number, date_block, tx_hash, sender_address, recipient_address, tx_value, success FROM transactions
+WHERE token_address = $1 AND date_block > TIMESTAMP 'yesterday' ORDER BY id DESC;