feat(p2p): add private peers

yarn-project/foundation/src/config/env_var.ts

@@ -116,6 +116,8 @@ export type EnvVar =
   | 'P2P_TX_POOL_KEEP_PROVEN_FOR'
   | 'P2P_ATTESTATION_POOL_KEEP_FOR'
   | 'P2P_ARCHIVED_TX_LIMIT'
+  | 'P2P_TRUSTED_PEERS'
+  | 'P2P_PRIVATE_PEERS'
   | 'P2P_MAX_TX_POOL_SIZE'
   | 'PEER_ID_PRIVATE_KEY'
   | 'PROVER_AGENT_COUNT'
@@ -218,5 +220,4 @@ export type EnvVar =
   | 'K8S_POD_UID'
   | 'K8S_NAMESPACE_NAME'
   | 'CUSTOM_FORWARDER_CONTRACT_ADDRESS'
-  | 'P2P_TRUSTED_PEERS'
   | 'FEE_ASSET_HANDLER_CONTRACT_ADDRESS';

yarn-project/p2p/src/config.ts

@@ -170,6 +170,11 @@ export interface P2PConfig extends P2PReqRespConfig, ChainConfig {
    */
   trustedPeers: string[];
 
+  /**
+   * A list of private peers.
+   */
+  privatePeers: string[];
+
   /**
    * The maximum possible size of the P2P DB in KB. Overwrites the general dataStoreMapSizeKB.
    */
@@ -347,7 +352,14 @@ export const p2pConfigMappings: ConfigMappingsType<P2PConfig> = {
   trustedPeers: {
     env: 'P2P_TRUSTED_PEERS',
     parseEnv: (val: string) => val.split(','),
-    description: 'A list of trusted peers ENRs. Separated by commas.',
+    description: 'A list of trusted peer ENRs that will always be persisted. Separated by commas.',
+    defaultValue: [],
+  },
+  privatePeers: {
+    env: 'P2P_PRIVATE_PEERS',
+    parseEnv: (val: string) => val.split(','),
+    description:
+      'A list of private peer ENRs that will always be persisted and not be used for discovery. Separated by commas.',
     defaultValue: [],
   },
   p2pStoreMapSizeKb: {

yarn-project/p2p/src/services/libp2p/libp2p_service.ts

@@ -318,7 +318,7 @@ export class LibP2PService<T extends P2PClientType = P2PClientType.Full> extends
     // Start job queue, peer discovery service and libp2p node
     this.jobQueue.start();
 
-    await this.peerManager.initializeTrustedPeers();
+    await this.peerManager.initializePeers();
     await this.peerDiscoveryService.start();
     await this.node.start();