Remove extra GetLogs() and add pagination option

Author: jbmlaird

logs.go

@@ -7,27 +7,26 @@
 
 package etherscan
 
-// GetLogs gets logs that match "topic" emitted by the specified "address" between the "fromBlock" and "toBlock"
-func (c *Client) GetLogs(fromBlock, toBlock int, address, topic string) (logs []Log, err error) {
-	param := M{
-		"fromBlock": fromBlock,
-		"toBlock":   toBlock,
-		"topic0":    topic,
-		"address":   address,
-	}
+type Option func(M)
 
-	err = c.call("logs", "getLogs", param, &logs)
-	return
+func WithPagination(page, offset int) Option {
+	return func(m M) {
+		m["page"] = page
+		m["offset"] = offset
+	}
 }
 
-func (c *Client) GetLogsWithPagination(fromBlock, toBlock int, address, topic string, page, offset int) (logs []Log, err error) {
+// GetLogs gets logs that match "topic" emitted by the specified "address" between the "fromBlock" and "toBlock"
+func (c *Client) GetLogs(fromBlock, toBlock int, address, topic string, options ...Option) (logs []Log, err error) {
 	param := M{
 		"fromBlock": fromBlock,
 		"toBlock":   toBlock,
 		"topic0":    topic,
 		"address":   address,
-		"page":      page,
-		"offset":    offset,
+	}
+
+	for _, applyOpt := range options {
+		applyOpt(param)
 	}
 
 	err = c.call("logs", "getLogs", param, &logs)

logs_e2e_test.go

@@ -87,32 +87,32 @@ func TestClient_GetLogsWithPagination(t *testing.T) {
 		errContain string
 	}{
 		{
-			name: "no page or offset",
+			name: "no page or offset returns all logs",
 			page: 0, off: 0,
 			wantSlice: expectedLogs,
 		},
 		{
-			name: "page=1, offset=0",
+			name: "page=1, offset=0 returns all logs",
 			page: 1, off: 0,
 			wantSlice: expectedLogs,
 		},
 		{
-			name: "page=2, offset=0",
+			name: "page=2, offset=0 returns all logs",
 			page: 2, off: 0,
 			wantSlice: expectedLogs,
 		},
 		{
-			name: "page=1, offset=2",
+			name: "page=1, offset=2 returns first 2 logs of 4",
 			page: 1, off: 2,
 			wantSlice: expectedLogs[0:2],
 		},
 		{
-			name: "page=2, offset=2",
+			name: "page=2, offset=2 returns last 2 logs of 4",
 			page: 2, off: 2,
 			wantSlice: expectedLogs[2:4],
 		},
 		{
-			name: "page=5, offset=1",
+			name: "page=5, offset=1 returns no logs as page is beyond available logs",
 			page: 5, off: 1,
 			wantSlice:  []Log{},
 			wantErr:    true,
@@ -122,13 +122,12 @@ func TestClient_GetLogsWithPagination(t *testing.T) {
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got, err := api.GetLogsWithPagination(
+			got, err := api.GetLogs(
 				379224,
 				430000,
 				"0x33990122638b9132ca29c723bdf037f1a891a70c",
 				"0xf63780e752c6a54a94fc52715dbc5518a3b4c3c2833d301a204226548a2a8545",
-				tt.page,
-				tt.off,
+				WithPagination(tt.page, tt.off),
 			)
 
 			if tt.wantErr {