Reducing logging noise for common errors

dev-docs/update-logs/2026-03-17.md

@@ -2,7 +2,7 @@
 
 ## Summary
 
-Enhanced REST request logging to capture client network identity in Winston logs and enabled proxy-aware IP resolution.
+Enhanced REST request logging to capture client network identity in Winston logs, enabled proxy-aware IP resolution, and reduced Fulcrum error-log noise for expected missing-transaction requests.
 
 ## Changes Made
 
@@ -12,6 +12,19 @@ Enhanced REST request logging to capture client network identity in Winston logs
   - Added structured Winston metadata fields to request logs:
     - `client_ip` from `req.ip`
     - `remote_address` from `req.socket.remoteAddress`
+- Updated `src/adapters/fulcrum-api.js`:
+  - Added parsing helpers to normalize Fulcrum error messages from multiple response shapes.
+  - Mapped common daemon missing-TX error (`No such mempool or blockchain transaction`) to:
+    - status `404`
+    - message `Transaction not found`
+- Updated `src/use-cases/fulcrum-use-cases.js`:
+  - Removed duplicate error logging in `getTransactionDetails()` and now rethrows adapter errors without a second error-level log.
+- Updated `src/controllers/rest-api/fulcrum/controller.js`:
+  - Added TXID validation (`64`-character hex) for `GET /v6/fulcrum/tx/data/:txid`.
+  - Updated `handleError()` logging policy:
+    - `Transaction not found` (`404`) logs at `info`
+    - other `4xx` logs at `warn`
+    - `5xx` logs at `error`
 
 ## Useful Fields Available for REST Request Logging
 
@@ -58,3 +71,6 @@ Enhanced REST request logging to capture client network identity in Winston logs
 - Request logs now preserve existing behavior while adding IP attribution fields.
 - `trust proxy` ensures `req.ip` is proxy-aware when the server is deployed behind a reverse proxy.
 - The project now has a documented list of high-value request fields for future logging expansion.
+- Fulcrum missing-transaction lookups now return cleaner API semantics (`404 Transaction not found`).
+- Duplicate error logs for a single missing TX lookup were removed.
+- Invalid TXIDs are rejected early with a `400` validation error.

src/adapters/fulcrum-api.js

@@ -65,17 +65,28 @@ class FulcrumAPIAdapter {
       // Attempt to extract error message from response data
       if (err.response && err.response.data) {
         const data = err.response.data
+        const status = err.response.status || 400
+        const message = this._extractErrorMessage(data)
+
+        if (this._isCommonMissingTxError(message)) {
+          return this._formatError('Transaction not found', 404)
+        }
+
+        if (message) {
+          return this._formatError(message, status)
+        }
+
         // Handle structured error responses
         if (data.error) {
-          return this._formatError(data.error, err.response.status || 400)
+          return this._formatError(data.error, status)
         }
         // Handle string error messages
         if (typeof data === 'string') {
-          return this._formatError(data, err.response.status || 400)
+          return this._formatError(data, status)
         }
         // Handle object responses that might contain error info
         if (typeof data === 'object' && data.message) {
-          return this._formatError(data.message, err.response.status || 400)
+          return this._formatError(data.message, status)
         }
         // Fallback to returning the status
         return this._formatError('Fulcrum API error', err.response.status || 500)
@@ -119,6 +130,25 @@ class FulcrumAPIAdapter {
       status: status || 500
     }
   }
+
+  _extractErrorMessage (data) {
+    if (!data) return ''
+
+    if (typeof data === 'string') return data
+
+    if (typeof data === 'object') {
+      if (typeof data.error === 'string') return data.error
+      if (data.error && typeof data.error === 'object' && data.error.message) return data.error.message
+      if (data.message) return data.message
+    }
+
+    return ''
+  }
+
+  _isCommonMissingTxError (message = '') {
+    return typeof message === 'string' &&
+      message.includes('No such mempool or blockchain transaction')
+  }
 }
 
 export default FulcrumAPIAdapter

src/controllers/rest-api/fulcrum/controller.js

@@ -87,6 +87,16 @@ class FulcrumRESTController {
     return cashAddr
   }
 
+  _isValidTxid (txid) {
+    return typeof txid === 'string' && /^[a-fA-F0-9]{64}$/.test(txid)
+  }
+
+  _isCommonMissingTxError (err) {
+    return err?.status === 404 &&
+      typeof err?.message === 'string' &&
+      err.message.includes('Transaction not found')
+  }
+
   /**
    * @api {get} /v6/fulcrum/balance/:address Get balance for a single address
    * @apiName GetBalance
@@ -239,10 +249,10 @@ class FulcrumRESTController {
     try {
       const txid = req.params.txid
 
-      if (typeof txid !== 'string') {
+      if (!this._isValidTxid(txid)) {
         return res.status(400).json({
           success: false,
-          error: 'txid must be a string'
+          error: 'txid must be a 64-character hex string'
         })
       }
 
@@ -575,9 +585,17 @@ class FulcrumRESTController {
   }
 
   handleError (err, res) {
-    wlogger.error('Error in FulcrumRESTController:', err)
-
     const status = err.status || 500
+    const isCommonMissingTxError = this._isCommonMissingTxError(err)
+
+    if (isCommonMissingTxError) {
+      wlogger.info(`Fulcrum transaction not found: ${err.message}`)
+    } else if (status >= 500) {
+      wlogger.error('Error in FulcrumRESTController:', err)
+    } else {
+      wlogger.warn(`Fulcrum client error (${status}): ${err.message}`)
+    }
+
     const message = err.message || 'Internal server error'
 
     return res.status(status).json({ error: message })

src/use-cases/fulcrum-use-cases.js

@@ -62,14 +62,9 @@ class FulcrumUseCases {
   }
 
   async getTransactionDetails ({ txid }) {
-    try {
     const response = await this.fulcrum.get(`electrumx/tx/data/${txid}`)
     // console.log(`getTransactionDetails() TXID ${txid}: ${JSON.stringify(response, null, 2)}`)
     return response
-    } catch (err) {
-      wlogger.error('Error in FulcrumUseCases.getTransactionDetails()', err)
-      throw err
-    }
   }
 
   async getTransactionDetailsBulk ({ txids, verbose }) {