empty array instead of 404

api/batch_test.go

@@ -35,6 +35,9 @@ type testBatchesResponse struct {
 }
 
 func (t testBatchesResponse) GetPending() (pendingItems, lastItemID uint64) {
+	if len(t.Batches) == 0 {
+		return 0, 0
+	}
 	pendingItems = t.PendingItems
 	lastItemID = t.Batches[len(t.Batches)-1].ItemID
 	return pendingItems, lastItemID
@@ -220,6 +223,13 @@ func TestGetBatches(t *testing.T) {
 	}
 	assertBatches(t, minMaxBatchNumBatches, fetchedBatches)
 
+	// Empty array
+	fetchedBatches = []testBatch{}
+	path = fmt.Sprintf("%s?slotNum=%d&minBatchNum=%d", endpoint, 1, 25)
+	err = doGoodReqPaginated(path, historydb.OrderAsc, &testBatchesResponse{}, appendIter)
+	assert.NoError(t, err)
+	assertBatches(t, []testBatch{}, fetchedBatches)
+
 	// 400
 	// Invalid minBatchNum
 	path = fmt.Sprintf("%s?minBatchNum=%d", endpoint, -2)
@@ -229,10 +239,6 @@ func TestGetBatches(t *testing.T) {
 	path = fmt.Sprintf("%s?forgerAddr=%s", endpoint, "0xG0000001")
 	err = doBadReq("GET", path, nil, 400)
 	assert.NoError(t, err)
-	// 404
-	path = fmt.Sprintf("%s?slotNum=%d&minBatchNum=%d", endpoint, 1, 25)
-	err = doBadReq("GET", path, nil, 404)
-	assert.NoError(t, err)
 }
 
 func TestGetBatch(t *testing.T) {

api/bids_test.go

@@ -29,6 +29,9 @@ type testBidsResponse struct {
 }
 
 func (t testBidsResponse) GetPending() (pendingItems, lastItemID uint64) {
+	if len(t.Bids) == 0 {
+		return 0, 0
+	}
 	pendingItems = t.PendingItems
 	lastItemID = t.Bids[len(t.Bids)-1].ItemID
 	return pendingItems, lastItemID
@@ -127,6 +130,13 @@ func TestGetBids(t *testing.T) {
 	}
 	assertBids(t, slotNumBidderAddrBids, fetchedBids)
 
+	// Empty array
+	fetchedBids = []testBid{}
+	path = fmt.Sprintf("%s?slotNum=%d&bidderAddr=%s", endpoint, 5, tc.bids[1].Bidder.String())
+	err = doGoodReqPaginated(path, historydb.OrderAsc, &testBidsResponse{}, appendIter)
+	assert.NoError(t, err)
+	assertBids(t, []testBid{}, fetchedBids)
+
 	// 400
 	// No filters
 	path = fmt.Sprintf("%s?limit=%d", endpoint, limit)
@@ -140,10 +150,6 @@ func TestGetBids(t *testing.T) {
 	path = fmt.Sprintf("%s?bidderAddr=%s", endpoint, "0xG0000001")
 	err = doBadReq("GET", path, nil, 400)
 	assert.NoError(t, err)
-	// 404
-	path = fmt.Sprintf("%s?slotNum=%d&bidderAddr=%s", endpoint, 5, tc.bids[1].Bidder.String())
-	err = doBadReq("GET", path, nil, 404)
-	assert.NoError(t, err)
 }
 
 func assertBids(t *testing.T, expected, actual []testBid) {

api/coordinator_test.go

@@ -16,6 +16,9 @@ type testCoordinatorsResponse struct {
 }
 
 func (t testCoordinatorsResponse) GetPending() (pendingItems, lastItemID uint64) {
+	if len(t.Coordinators) == 0 {
+		return 0, 0
+	}
 	pendingItems = t.PendingItems
 	lastItemID = t.Coordinators[len(t.Coordinators)-1].ItemID
 	return pendingItems, lastItemID
@@ -67,7 +70,6 @@ func TestGetCoordinators(t *testing.T) {
 		reversedCoordinators = append(reversedCoordinators, tc.coordinators[len(tc.coordinators)-1-i])
 	}
 	assertCoordinators(t, reversedCoordinators, fetchedCoordinators)
-
 	for _, filteredCoord := range tc.coordinators {
 		// By bidder
 		fetchedCoordinators = []historydb.CoordinatorAPI{}
@@ -87,14 +89,17 @@ func TestGetCoordinators(t *testing.T) {
 		assertCoordinators(t, []historydb.CoordinatorAPI{filteredCoord}, fetchedCoordinators)
 	}
 
+	// Empty array
+	fetchedCoordinators = []historydb.CoordinatorAPI{}
+	path = fmt.Sprintf("%s?bidderAddr=0xaa942cfcd25ad4d90a62358b0dd84f33b398262a", endpoint)
+	err = doGoodReqPaginated(path, historydb.OrderDesc, &testCoordinatorsResponse{}, appendIter)
+	assert.NoError(t, err)
+	assertCoordinators(t, []historydb.CoordinatorAPI{}, fetchedCoordinators)
+
 	// 400
 	path = fmt.Sprintf("%s?bidderAddr=0x001", endpoint)
 	err = doBadReq("GET", path, nil, 400)
 	assert.NoError(t, err)
-	// 404
-	path = fmt.Sprintf("%s?bidderAddr=0xaa942cfcd25ad4d90a62358b0dd84f33b398262a", endpoint)
-	err = doBadReq("GET", path, nil, 404)
-	assert.NoError(t, err)
 }
 
 func assertCoordinator(t *testing.T, expected, actual historydb.CoordinatorAPI) {

api/exits_test.go

@@ -43,6 +43,9 @@ type testExitsResponse struct {
 }
 
 func (t testExitsResponse) GetPending() (pendingItems, lastItemID uint64) {
+	if len(t.Exits) == 0 {
+		return 0, 0
+	}
 	pendingItems = t.PendingItems
 	lastItemID = t.Exits[len(t.Exits)-1].ItemID
 	return pendingItems, lastItemID
@@ -248,6 +251,12 @@ func TestGetExits(t *testing.T) {
 	err = doGoodReqPaginated(path, historydb.OrderDesc, &testExitsResponse{}, appendIter)
 	assert.NoError(t, err)
 	assertExitAPIs(t, flipedExits, fetchedExits)
+	// Empty array
+	fetchedExits = []testExit{}
+	path = fmt.Sprintf("%s?batchNum=999999", endpoint)
+	err = doGoodReqPaginated(path, historydb.OrderDesc, &testExitsResponse{}, appendIter)
+	assert.NoError(t, err)
+	assertExitAPIs(t, []testExit{}, fetchedExits)
 	// 400
 	path = fmt.Sprintf(
 		"%s?accountIndex=%s&hezEthereumAddress=%s",
@@ -258,13 +267,6 @@ func TestGetExits(t *testing.T) {
 	path = fmt.Sprintf("%s?tokenId=X", endpoint)
 	err = doBadReq("GET", path, nil, 400)
 	assert.NoError(t, err)
-	// 404
-	path = fmt.Sprintf("%s?batchNum=999999", endpoint)
-	err = doBadReq("GET", path, nil, 404)
-	assert.NoError(t, err)
-	path = fmt.Sprintf("%s?fromItem=1000999999", endpoint)
-	err = doBadReq("GET", path, nil, 404)
-	assert.NoError(t, err)
 }
 
 func TestGetExit(t *testing.T) {

api/swagger.yml

@@ -215,12 +215,6 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error400'
-        '404':
-          description: Not found.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error404'
         '500':
           description: Internal server error.
           content:
@@ -347,12 +341,6 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error400'
-        '404':
-          description: Not found.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error404'
         '500':
           description: Internal server error.
           content:
@@ -565,12 +553,6 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error400'
-        '404':
-          description: Not found.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error404'
         '500':
           description: Internal server error.
           content:
@@ -687,12 +669,6 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error400'
-        '404':
-          description: Not found.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error404'
         '500':
           description: Internal server error.
           content:
@@ -850,12 +826,6 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error400'
-        '404':
-          description: Not found.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error404'
         '500':
           description: Internal server error.
           content:
@@ -960,12 +930,6 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error400'
-        '404':
-          description: Not found.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error404'
         '500':
           description: Internal server error.
           content:
@@ -1085,12 +1049,6 @@ paths:
             application/json:
               schema:
                 $ref: '#/components/schemas/Error400'
-        '404':
-          description: Not found.
-          content:
-            application/json:
-              schema:
-                $ref: '#/components/schemas/Error404'
         '500':
           description: Internal server error.
           content:

api/txshistory_test.go

@@ -88,6 +88,9 @@ type testTxsResponse struct {
 }
 
 func (t testTxsResponse) GetPending() (pendingItems, lastItemID uint64) {
+	if len(t.Txs) == 0 {
+		return 0, 0
+	}
 	pendingItems = t.PendingItems
 	lastItemID = t.Txs[len(t.Txs)-1].ItemID
 	return pendingItems, lastItemID
@@ -420,6 +423,12 @@ func TestGetHistoryTxs(t *testing.T) {
 		flipedTxs = append(flipedTxs, tc.txs[len(tc.txs)-1-i])
 	}
 	assertTxs(t, flipedTxs, fetchedTxs)
+	// Empty array
+	fetchedTxs = []testTx{}
+	path = fmt.Sprintf("%s?batchNum=999999", endpoint)
+	err = doGoodReqPaginated(path, historydb.OrderDesc, &testTxsResponse{}, appendIter)
+	assert.NoError(t, err)
+	assertTxs(t, []testTx{}, fetchedTxs)
 	// 400
 	path = fmt.Sprintf(
 		"%s?accountIndex=%s&hezEthereumAddress=%s",
@@ -430,13 +439,6 @@ func TestGetHistoryTxs(t *testing.T) {
 	path = fmt.Sprintf("%s?tokenId=X", endpoint)
 	err = doBadReq("GET", path, nil, 400)
 	assert.NoError(t, err)
-	// 404
-	path = fmt.Sprintf("%s?batchNum=999999", endpoint)
-	err = doBadReq("GET", path, nil, 404)
-	assert.NoError(t, err)
-	path = fmt.Sprintf("%s?fromItem=1000999999", endpoint)
-	err = doBadReq("GET", path, nil, 404)
-	assert.NoError(t, err)
 }
 
 func TestGetHistoryTx(t *testing.T) {

db/historydb/historydb.go

@@ -1,7 +1,6 @@
 package historydb
 
 import (
-	"database/sql"
 	"errors"
 	"fmt"
 	"math"
@@ -265,7 +264,7 @@ func (hdb *HistoryDB) GetBatchesAPI(
 	}
 	batches := db.SlicePtrsToSlice(batchPtrs).([]BatchAPI)
 	if len(batches) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return batches, 0, nil
 	}
 	return batches, batches[0].TotalItems - uint64(len(batches)), nil
 }
@@ -441,7 +440,7 @@ func (hdb *HistoryDB) GetBestBidsAPI(
 	// log.Debug(query)
 	bids := db.SlicePtrsToSlice(bidPtrs).([]BidAPI)
 	if len(bids) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return bids, 0, nil
 	}
 	return bids, bids[0].TotalItems - uint64(len(bids)), nil
 }
@@ -512,7 +511,7 @@ func (hdb *HistoryDB) GetBidsAPI(
 		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(bids) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return []BidAPI{}, 0, nil
 	}
 	return db.SlicePtrsToSlice(bids).([]BidAPI), bids[0].TotalItems - uint64(len(bids)), nil
 }
@@ -739,7 +738,7 @@ func (hdb *HistoryDB) GetTokens(
 		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(tokens) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return []TokenWithUSD{}, 0, nil
 	}
 	return db.SlicePtrsToSlice(tokens).([]TokenWithUSD), uint64(len(tokens)) - tokens[0].TotalItems, nil
 }
@@ -1056,7 +1055,7 @@ func (hdb *HistoryDB) GetHistoryTxs(
 	}
 	txs := db.SlicePtrsToSlice(txsPtrs).([]TxAPI)
 	if len(txs) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return txs, 0, nil
 	}
 	return txs, txs[0].TotalItems - uint64(len(txs)), nil
 }
@@ -1199,7 +1198,7 @@ func (hdb *HistoryDB) GetExitsAPI(
 		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(exits) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return []ExitAPI{}, 0, nil
 	}
 	return db.SlicePtrsToSlice(exits).([]ExitAPI), exits[0].TotalItems - uint64(len(exits)), nil
 }
@@ -1688,7 +1687,7 @@ func (hdb *HistoryDB) GetCoordinatorsAPI(
 		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(coordinators) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return []CoordinatorAPI{}, 0, nil
 	}
 	return db.SlicePtrsToSlice(coordinators).([]CoordinatorAPI),
 		coordinators[0].TotalItems - uint64(len(coordinators)), nil
@@ -1811,7 +1810,7 @@ func (hdb *HistoryDB) GetAccountsAPI(
 		return nil, 0, tracerr.Wrap(err)
 	}
 	if len(accounts) == 0 {
-		return nil, 0, tracerr.Wrap(sql.ErrNoRows)
+		return []AccountAPI{}, 0, nil
 	}
 
 	return db.SlicePtrsToSlice(accounts).([]AccountAPI),