statesync: implement p2p state provider (#6807)

internal/test/factory/doc.go

@@ -0,0 +1,6 @@
+/*
+Package factory provides generation code for common structs in Tendermint.
+It is used primarily for the testing of internal components such as statesync,
+consensus, blocksync etc..
+*/
+package factory

internal/test/factory/factory_test.go

@@ -12,3 +12,7 @@ func TestMakeHeader(t *testing.T) {
 	_, err := MakeHeader(&types.Header{})
 	assert.NoError(t, err)
 }
+
+func TestRandomNodeID(t *testing.T) {
+	assert.NotPanics(t, func() { RandomNodeID() })
+}

internal/test/factory/p2p.go

@@ -0,0 +1,27 @@
+package factory
+
+import (
+	"encoding/hex"
+	"strings"
+
+	"github.com/tendermint/tendermint/libs/rand"
+	"github.com/tendermint/tendermint/types"
+)
+
+// NodeID returns a valid NodeID based on an inputted string
+func NodeID(str string) types.NodeID {
+	id, err := types.NewNodeID(strings.Repeat(str, 2*types.NodeIDByteLength))
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// RandomNodeID returns a randomly generated valid NodeID
+func RandomNodeID() types.NodeID {
+	id, err := types.NewNodeID(hex.EncodeToString(rand.Bytes(types.NodeIDByteLength)))
+	if err != nil {
+		panic(err)
+	}
+	return id
+}