feat(logging): replace 207 console.log/error/warn with pino structured logger (#58)

- Add pino + pino-pretty dependencies
- Create src/utils/logger.js with env-based LOG_LEVEL
- Replace all 207 console.log/error/warn calls across 46 source files
- Remove [DEBUG], [ERROR] string prefixes (levels convey this)
- Add pino redact for sensitive fields (mnemonic, privateKey, token, etc.)
- Structured logging with context objects instead of string interpolation
- NODE_ENV=production disables pino-pretty transport

49 files changed, 5601 insertions, 6056 deletions

src/utils/walletGenerator.js

@@ -8,6 +8,7 @@ import * as bitcoin from 'bitcoinjs-lib';
 import * as ecc from 'tiny-secp256k1';
 import { ECPairFactory } from 'ecpair';
 import CryptoJS from 'crypto';
+import logger from './logger.js';
 
 const ECPair = ECPairFactory(ecc);
 
@@ -16,7 +17,7 @@ export default class WalletGenerator {
     try {
       return bip39.generateMnemonic(128); // 12 слов
     } catch (error) {
-      console.error('Error generating mnemonic:', error);
+      logger.error({ err: error }, 'Error generating mnemonic');
       throw new Error('Failed to generate mnemonic');
     }
   }
@@ -86,7 +87,7 @@ export default class WalletGenerator {
         },
       };
     } catch (error) {
-      console.error('Error in generateWallets:', error);
+      logger.error({ err: error }, 'Error in generateWallets');
       throw new Error('Failed to generate cryptocurrency wallets: ' + error.message);
     }
   }