Introduce flag

Signed-off-by: Luis Mastrangelo <[email protected]>

Author: acuarica

docs/configuration.md

@@ -87,6 +87,7 @@ Unless you need to set a non-default value, it is recommended to only populate o
 | `MIRROR_NODE_URL`                           | ""                                    | The Mirror Node API endpoint. Official endpoints are Previewnet (https://previewnet.mirrornode.hedera.com), Testnet (https://testnet.mirrornode.hedera.com), Mainnet (https://mainnet-public.mirrornode.hedera.com). See [Mirror Node REST API](https://docs.hedera.com/hedera/sdks-and-apis/rest-api)                                                                                                                                                                                     |
 | `MIRROR_NODE_URL_HEADER_X_API_KEY`          | ""                                    | Authentication for a `MIRROR_NODE_URL` that requires authentication via the `x-api-key` header.                                                                                                                                                                                                                                                                                                                                                                                            |
 | `MULTI_SET`                                 | "false"                               | Switch between different implementation of setting multiple K/V pairs in the shared cache. True is mSet, false is pipeline                                                                                                                                                                                                                                                                                                                                                                 |
+| `OPCODELOGGER_ENABLED`                      | "true"                                | Whether the `opcodeLogger` tracer is enabled for a call to `debug_traceTransaction`. This setting should match the value `hiero.mirror.web3.opcode.tracer.enabled` in the Mirror Node used. See [HIP-801](https://hips.hedera.com/hip/hip-801) for more information.                                                                                                                                                                                                                       |
 | `JUMBO_TX_ENABLED`                          | "true"                                | Controls how large transactions are handled during `eth_sendRawTransaction`. When set to `true`, transactions up to 128KB can be sent directly to consensus nodes without using Hedera File Service (HFS), as long as contract bytecode doesn't exceed 24KB. When set to `false`, all transactions containing contract deployments use the traditional HFS approach. This feature leverages the increased transaction size limit to simplify processing of standard Ethereum transactions. |
 | `IP_RATE_LIMIT_STORE`                       | null                                  | Specifies the rate limit store to use for IP-based rate limiting: valid values are "LRU", "REDIS", with the possibility to be extended with a custom implementation (see [Store Selection](rate-limiting.md#store-selection)). If unset, falls back to Redis when `REDIS_ENABLED=true`, otherwise uses in-memory LRU.                                                                                                                                                                      |
 | `REDIS_ENABLED`                             | "true"                                | Enable usage of Redis as shared cache                                                                                                                                                                                                                                                                                                                                                                                                                                                      |

packages/config-service/src/services/globalConfig.ts

@@ -593,6 +593,12 @@ const _CONFIG = {
     required: true,
     defaultValue: null,
   },
+  OPCODELOGGER_ENABLED: {
+    envName: 'OPCODELOGGER_ENABLED',
+    type: 'boolean',
+    required: false,
+    defaultValue: true,
+  },
   OPERATOR_ID_ETH_SENDRAWTRANSACTION: {
     envName: 'OPERATOR_ID_ETH_SENDRAWTRANSACTION',
     type: 'string',

packages/relay/src/lib/debug.ts

@@ -133,6 +133,10 @@ export class DebugImpl implements Debug {
       if (tracer === TracerType.CallTracer) {
         return await this.callTracer(transactionIdOrHash, tracerConfig as ICallTracerConfig, requestDetails);
       }
+
+      if (!ConfigService.get('OPCODELOGGER_ENABLED')) {
+        throw predefined.UNSUPPORTED_METHOD;
+      }
       return await this.callOpcodeLogger(transactionIdOrHash, tracerConfig as IOpcodeLoggerConfig, requestDetails);
     } catch (e) {
       throw this.common.genericErrorHandler(e);