Merge pull request #151 from blinklabs-io/fix/chainsync-tip

fix: properly handle intersect at tip in bulk mode in chainsync input

Author: agaffney

go.mod

@@ -3,7 +3,7 @@ module github.com/blinklabs-io/snek
 go 1.20
 
 require (
-	github.com/blinklabs-io/gouroboros v0.67.1
+	github.com/blinklabs-io/gouroboros v0.69.2
 	github.com/gen2brain/beeep v0.0.0-20230602101333-f384c29b62dd
 	github.com/gin-gonic/gin v1.9.1
 	github.com/kelseyhightower/envconfig v1.4.0

go.sum

@@ -4,8 +4,8 @@ cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGB
 cloud.google.com/go/compute/metadata v0.2.3/go.mod h1:VAV5nSsACxMJvgaAuX6Pk2AawlZn8kiOGuCv6gTkwuA=
 github.com/KyleBanks/depth v1.2.1 h1:5h8fQADFrWtarTdtDudMmGsC7GPbOAu6RVB3ffsVFHc=
 github.com/KyleBanks/depth v1.2.1/go.mod h1:jzSb9d0L43HxTQfT+oSA1EEp2q+ne2uh6XgeJcm8brE=
-github.com/blinklabs-io/gouroboros v0.67.1 h1:SyzxCIEa2rph3KQr1D+PgqsPNFORN/OdwNtrL0h42g8=
-github.com/blinklabs-io/gouroboros v0.67.1/go.mod h1:Q154NJPs7gB93Tggt8ts9RGIlW2kkknr6M90Q3jh0s4=
+github.com/blinklabs-io/gouroboros v0.69.2 h1:6FQwC1KxTPYbbugolNU03Dvm3vaCZWoceaaWLx6Skw0=
+github.com/blinklabs-io/gouroboros v0.69.2/go.mod h1:ppm97qgdO1ZsfrrziSgmRRChtESfLtGaUcn9UN1Ft5A=
 github.com/bytedance/sonic v1.5.0/go.mod h1:ED5hyg4y6t3/9Ku1R6dU/4KyJ48DZ4jPhfY1O2AihPM=
 github.com/bytedance/sonic v1.10.0-rc/go.mod h1:ElCzW+ufi8qKqNW0FY314xriJhyJhuoJ3gFZdAHF7NM=
 github.com/bytedance/sonic v1.10.2 h1:GQebETVBxYB7JGWJtLBi07OVzWwt+8dWA00gEVW2ZFE=

input/chainsync/chainsync.go

@@ -92,15 +92,24 @@ func (c *ChainSync) Start() error {
 		c.oConn.BlockFetch().Client.Start()
 	}
 	if c.bulkMode && !c.intersectTip && c.oConn.BlockFetch() != nil {
+		// Get available block range between our intersect point(s) and the chain tip
 		var err error
 		c.bulkRangeStart, c.bulkRangeEnd, err = c.oConn.ChainSync().Client.GetAvailableBlockRange(
 			c.intersectPoints,
 		)
 		if err != nil {
 			return err
 		}
-		if err := c.oConn.BlockFetch().Client.GetBlockRange(c.bulkRangeStart, c.bulkRangeEnd); err != nil {
-			return err
+		if c.bulkRangeStart.Slot == 0 || c.bulkRangeEnd.Slot == 0 {
+			// We're already at chain tip, so start a normal sync
+			if err := c.oConn.ChainSync().Client.Sync(c.intersectPoints); err != nil {
+				return err
+			}
+		} else {
+			// Use BlockFetch to request the entire available block range at once
+			if err := c.oConn.BlockFetch().Client.GetBlockRange(c.bulkRangeStart, c.bulkRangeEnd); err != nil {
+				return err
+			}
 		}
 	} else {
 		if c.intersectTip {