HIP-1137: Block Node discoverability via on-chain registry (#1659)

Signed-off-by: dosi <dosi.kolev@limechain.tech>

Author: Dosik13

examples/registered_node/main.go

@@ -0,0 +1,256 @@
+package main
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"time"
+
+	hiero "github.com/hiero-ledger/hiero-sdk-go/v2/sdk"
+)
+
+// Registered Node Lifecycle
+//
+// Walks through the full lifecycle of a registered node:
+//  1. Generate an admin key.
+//  2. Create a registered node with a block node service endpoint.
+//  3. Query the RegisteredNodeAddressBook to confirm it appears.
+//  4. Update the registered node with a new description and a second endpoint.
+//  5. Associate the registered node with an existing consensus node.
+//  6. Delete the registered node.
+//
+// Environment:
+//
+//	HEDERA_NETWORK          — e.g. "previewnet", "testnet", or "mainnet"
+//	GENESIS_OPERATOR_ID     — optional override (defaults to "0.0.2")
+//	GENESIS_OPERATOR_KEY    — optional override (defaults to the genesis Ed25519 key)
+//	CONSENSUS_NODE_ID       — numeric consensus node ID to associate (optional; step 5 is skipped if unset)
+//	CONSENSUS_NODE_ADMIN_KEY — DER-encoded admin key for that consensus node (optional; required if CONSENSUS_NODE_ID is set)
+func main() {
+	client := setupClient()
+
+	// Step 1 — generate the registered node admin key.
+	adminKey, err := hiero.PrivateKeyGenerateEd25519()
+	if err != nil {
+		panic(fmt.Sprintf("%v : error generating admin key", err))
+	}
+	fmt.Printf("Generated registered-node admin key: %s\n", adminKey.PublicKey().String())
+
+	// Steps 2-4 — create a new registered node.
+	registeredNodeId := createRegisteredNode(client, adminKey)
+	fmt.Printf("Created registered node with id: %d\n", registeredNodeId)
+
+	// Wait for the mirror node to ingest the new entry.
+	time.Sleep(time.Second * 5)
+
+	// Step 5 — query the address book and confirm the new node is present.
+	verifyInAddressBook(client, registeredNodeId)
+
+	// Steps 6-7 — update the registered node with a new description and both endpoints.
+	updateRegisteredNode(client, adminKey, registeredNodeId)
+
+	// Step 8 — associate with an existing consensus node (optional).
+	associateWithConsensusNode(client, registeredNodeId)
+
+	// Step 9 — delete the registered node.
+	deleteRegisteredNode(client, adminKey, registeredNodeId)
+
+	if err := client.Close(); err != nil {
+		panic(fmt.Sprintf("%v : error closing client", err))
+	}
+}
+
+// setupClient builds a Hiero client from HEDERA_NETWORK and configures the
+// operator. The operator defaults to account 0.0.2 + genesis Ed25519 key (the
+// standard local hedera-services bootstrap, also what the HIP-1137 e2e tests
+// use); override via GENESIS_OPERATOR_ID / GENESIS_OPERATOR_KEY if your
+// network has a different system account.
+func setupClient() *hiero.Client {
+	client, err := hiero.ClientForName(os.Getenv("HEDERA_NETWORK"))
+	if err != nil {
+		panic(fmt.Sprintf("%v : error creating client", err))
+	}
+
+	operatorIDStr := os.Getenv("GENESIS_OPERATOR_ID")
+	if operatorIDStr == "" {
+		operatorIDStr = "0.0.2"
+	}
+	operatorAccountID, err := hiero.AccountIDFromString(operatorIDStr)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error parsing operator ID", err))
+	}
+
+	operatorKeyStr := os.Getenv("GENESIS_OPERATOR_KEY")
+	if operatorKeyStr == "" {
+		operatorKeyStr = "302e020100300506032b65700422042091132178e72057a1d7528025956fe39b0b847f200ab59b2fdd367017f3087137"
+	}
+	operatorKey, err := hiero.PrivateKeyFromString(operatorKeyStr)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error parsing operator key", err))
+	}
+
+	client.SetOperator(operatorAccountID, operatorKey)
+	return client
+}
+
+// createRegisteredNode submits a RegisteredNodeCreateTransaction with a single
+// block-node endpoint and returns the assigned registeredNodeId.
+func createRegisteredNode(client *hiero.Client, adminKey hiero.PrivateKey) uint64 {
+	primaryEndpoint := &hiero.BlockNodeServiceEndpoint{}
+	primaryEndpoint.
+		SetIPAddress(net.IPv4(192, 168, 1, 1).To4()).
+		SetPort(50211).
+		SetRequiresTls(true).
+		SetEndpointApis([]hiero.BlockNodeApi{
+			hiero.BlockNodeApiSubscribeStream,
+			hiero.BlockNodeApiStatus,
+		})
+
+	createTx, err := hiero.NewRegisteredNodeCreateTransaction().
+		SetAdminKey(adminKey).
+		SetDescription("My Block Node").
+		SetServiceEndpoints([]hiero.RegisteredServiceEndpoint{primaryEndpoint}).
+		FreezeWith(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error freezing create tx", err))
+	}
+
+	createResp, err := createTx.Sign(adminKey).Execute(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error executing create tx", err))
+	}
+
+	createReceipt, err := createResp.SetValidateStatus(true).GetReceipt(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error fetching create receipt", err))
+	}
+
+	if createReceipt.RegisteredNodeId == nil || *createReceipt.RegisteredNodeId == 0 {
+		panic("expected a non-zero registeredNodeId on the receipt")
+	}
+	return *createReceipt.RegisteredNodeId
+}
+
+// verifyInAddressBook queries the mirror node and panics if the given
+// registered node id is missing.
+func verifyInAddressBook(client *hiero.Client, registeredNodeId uint64) {
+	book, err := hiero.NewRegisteredNodeAddressBookQuery().
+		SetRegisteredNodeId(registeredNodeId).
+		Execute(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error executing address book query", err))
+	}
+
+	for _, n := range book.RegisteredNodes {
+		if n.RegisteredNodeID == registeredNodeId {
+			fmt.Printf("Address book returned registered node: id=%d description=%q\n",
+				n.RegisteredNodeID, n.Description)
+			return
+		}
+	}
+	panic("registered node was not found in the address book")
+}
+
+// updateRegisteredNode submits a RegisteredNodeUpdateTransaction with a new
+// description and adds a second (domain-name) endpoint alongside the original.
+func updateRegisteredNode(client *hiero.Client, adminKey hiero.PrivateKey, registeredNodeId uint64) {
+	primaryEndpoint := &hiero.BlockNodeServiceEndpoint{}
+	primaryEndpoint.
+		SetIPAddress(net.IPv4(192, 168, 1, 1).To4()).
+		SetPort(50211).
+		SetRequiresTls(true).
+		SetEndpointApis([]hiero.BlockNodeApi{
+			hiero.BlockNodeApiSubscribeStream,
+			hiero.BlockNodeApiStatus,
+		})
+
+	secondaryEndpoint := &hiero.BlockNodeServiceEndpoint{}
+	secondaryEndpoint.
+		SetDomainName("block.example.com").
+		SetPort(50212).
+		SetRequiresTls(true).
+		SetEndpointApis([]hiero.BlockNodeApi{hiero.BlockNodeApiStatus})
+
+	updateTx, err := hiero.NewRegisteredNodeUpdateTransaction().
+		SetRegisteredNodeId(registeredNodeId).
+		SetDescription("My Updated Block Node").
+		SetServiceEndpoints([]hiero.RegisteredServiceEndpoint{primaryEndpoint, secondaryEndpoint}).
+		FreezeWith(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error freezing update tx", err))
+	}
+
+	updateResp, err := updateTx.Sign(adminKey).Execute(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error executing update tx", err))
+	}
+
+	updateReceipt, err := updateResp.SetValidateStatus(true).GetReceipt(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error fetching update receipt", err))
+	}
+	fmt.Printf("Update receipt status: %s\n", updateReceipt.Status)
+}
+
+// associateWithConsensusNode runs step 8 of the lifecycle. Skipped when
+// CONSENSUS_NODE_ID is unset, since most operators don't hold a consensus
+// node's admin key.
+func associateWithConsensusNode(client *hiero.Client, registeredNodeId uint64) {
+	consensusNodeIDStr := os.Getenv("CONSENSUS_NODE_ID")
+	if consensusNodeIDStr == "" {
+		fmt.Println("CONSENSUS_NODE_ID not set — skipping consensus-node association step")
+		return
+	}
+
+	var consensusNodeID uint64
+	if _, err := fmt.Sscanf(consensusNodeIDStr, "%d", &consensusNodeID); err != nil {
+		panic(fmt.Sprintf("%v : error parsing CONSENSUS_NODE_ID", err))
+	}
+
+	consensusAdminKey, err := hiero.PrivateKeyFromString(os.Getenv("CONSENSUS_NODE_ADMIN_KEY"))
+	if err != nil {
+		panic(fmt.Sprintf("%v : error parsing CONSENSUS_NODE_ADMIN_KEY", err))
+	}
+
+	nodeUpdateTx, err := hiero.NewNodeUpdateTransaction().
+		SetNodeID(consensusNodeID).
+		AddAssociatedRegisteredNode(registeredNodeId).
+		FreezeWith(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error freezing node update tx", err))
+	}
+
+	nodeUpdateResp, err := nodeUpdateTx.Sign(consensusAdminKey).Execute(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error executing node update tx", err))
+	}
+
+	nodeUpdateReceipt, err := nodeUpdateResp.SetValidateStatus(true).GetReceipt(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error fetching node update receipt", err))
+	}
+	fmt.Printf("Consensus node %d updated with associated registered node %d: %s\n",
+		consensusNodeID, registeredNodeId, nodeUpdateReceipt.Status)
+}
+
+// deleteRegisteredNode submits a RegisteredNodeDeleteTransaction and waits for
+// the receipt.
+func deleteRegisteredNode(client *hiero.Client, adminKey hiero.PrivateKey, registeredNodeId uint64) {
+	deleteTx, err := hiero.NewRegisteredNodeDeleteTransaction().
+		SetRegisteredNodeId(registeredNodeId).
+		FreezeWith(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error freezing delete tx", err))
+	}
+
+	deleteResp, err := deleteTx.Sign(adminKey).Execute(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error executing delete tx", err))
+	}
+
+	deleteReceipt, err := deleteResp.SetValidateStatus(true).GetReceipt(client)
+	if err != nil {
+		panic(fmt.Sprintf("%v : error fetching delete receipt", err))
+	}
+	fmt.Printf("Delete receipt status: %s\n", deleteReceipt.Status)
+}