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║                    CRYPTOCURRENCY API CONFIGURATION - COMPLETE GUIDE                 ║
║                         تنظیمات کامل API های ارز دیجیتال                            ║
║                              Updated: October 2025                                   ║
╚══════════════════════════════════════════════════════════════════════════════════════╝

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                              🔑 API KEYS - کلیدهای API  
═══════════════════════════════════════════════════════════════════════════════════════

EXISTING KEYS (کلیدهای موجود):
─────────────────────────────────
TronScan:           7ae72726-bffe-4e74-9c33-97b761eeea21
BscScan:            K62RKHGXTDCG53RU4MCG6XABIMJKTN19IT
Etherscan:          SZHYFZK2RR8H9TIMJBVW54V4H81K2Z2KR2
Etherscan_2:        T6IR8VJHX2NE6ZJW2S3FDVN1TYG4PYYI45
CoinMarketCap:      04cf4b5b-9868-465c-8ba0-9f2e78c92eb1
CoinMarketCap_2:    b54bcf4d-1bca-4e8e-9a24-22ff2c3d462c
NewsAPI:            pub_346789abc123def456789ghi012345jkl
CryptoCompare:      e79c8e6d4c5b4a3f2e1d0c9b8a7f6e5d4c3b2a1f


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                🌐 CORS PROXY SOLUTIONS - راه‌حل‌های پروکسی CORS
═══════════════════════════════════════════════════════════════════════════════════════

FREE CORS PROXIES (پروکسی‌های رایگان):
──────────────────────────────────────────

1. AllOrigins (بدون محدودیت)
   URL: https://api.allorigins.win/get?url={TARGET_URL}
   Example: https://api.allorigins.win/get?url=https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=usd
   Features: JSON/JSONP, گزینه raw content
   
2. CORS.SH (بدون rate limit)
   URL: https://proxy.cors.sh/{TARGET_URL}
   Example: https://proxy.cors.sh/https://api.coinmarketcap.com/v1/cryptocurrency/quotes/latest
   Features: سریع، قابل اعتماد، نیاز به header Origin یا x-requested-with
   
3. Corsfix (60 req/min رایگان)
   URL: https://proxy.corsfix.com/?url={TARGET_URL}
   Example: https://proxy.corsfix.com/?url=https://api.etherscan.io/api
   Features: header override، cached responses
   
4. CodeTabs (محبوب)
   URL: https://api.codetabs.com/v1/proxy?quest={TARGET_URL}
   Example: https://api.codetabs.com/v1/proxy?quest=https://api.binance.com/api/v3/ticker/price
   
5. ThingProxy (10 req/sec)
   URL: https://thingproxy.freeboard.io/fetch/{TARGET_URL}
   Example: https://thingproxy.freeboard.io/fetch/https://api.nomics.com/v1/currencies/ticker
   Limit: 100,000 characters per request
   
6. Crossorigin.me
   URL: https://crossorigin.me/{TARGET_URL}
   Note: فقط GET، محدودیت 2MB
   
7. Self-Hosted CORS-Anywhere
   GitHub: https://github.com/Rob--W/cors-anywhere
   Deploy: Cloudflare Workers، Vercel، Heroku

USAGE PATTERN (الگوی استفاده):
────────────────────────────────
// Without CORS Proxy
fetch('https://api.example.com/data')

// With CORS Proxy
const corsProxy = 'https://api.allorigins.win/get?url=';
fetch(corsProxy + encodeURIComponent('https://api.example.com/data'))
  .then(res => res.json())
  .then(data => console.log(data.contents));


═══════════════════════════════════════════════════════════════════════════════════════
            🔗 RPC NODE PROVIDERS - ارائه‌دهندگان نود RPC
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ETHEREUM RPC ENDPOINTS:
───────────────────────────────────

1. Infura (رایگان: 100K req/day)
   Mainnet: https://mainnet.infura.io/v3/{PROJECT_ID}
   Sepolia: https://sepolia.infura.io/v3/{PROJECT_ID}
   Docs: https://docs.infura.io
   
2. Alchemy (رایگان: 300M compute units/month)
   Mainnet: https://eth-mainnet.g.alchemy.com/v2/{API_KEY}
   Sepolia: https://eth-sepolia.g.alchemy.com/v2/{API_KEY}
   WebSocket: wss://eth-mainnet.g.alchemy.com/v2/{API_KEY}
   Docs: https://docs.alchemy.com
   
3. Ankr (رایگان: بدون محدودیت عمومی)
   Mainnet: https://rpc.ankr.com/eth
   Docs: https://www.ankr.com/docs
   
4. PublicNode (کاملا رایگان)
   Mainnet: https://ethereum.publicnode.com
   All-in-one: https://ethereum-rpc.publicnode.com
   
5. Cloudflare (رایگان)
   Mainnet: https://cloudflare-eth.com
   
6. LlamaNodes (رایگان)
   Mainnet: https://eth.llamarpc.com
   
7. 1RPC (رایگان با privacy)
   Mainnet: https://1rpc.io/eth
   
8. Chainnodes (ارزان)
   Mainnet: https://mainnet.chainnodes.org/{API_KEY}
   
9. dRPC (decentralized)
   Mainnet: https://eth.drpc.org
   Docs: https://drpc.org

BSC (BINANCE SMART CHAIN) RPC:
──────────────────────────────────

1. Official BSC RPC (رایگان)
   Mainnet: https://bsc-dataseed.binance.org
   Alt1: https://bsc-dataseed1.defibit.io
   Alt2: https://bsc-dataseed1.ninicoin.io
   
2. Ankr BSC
   Mainnet: https://rpc.ankr.com/bsc
   
3. PublicNode BSC
   Mainnet: https://bsc-rpc.publicnode.com
   
4. Nodereal BSC (رایگان: 3M req/day)
   Mainnet: https://bsc-mainnet.nodereal.io/v1/{API_KEY}

TRON RPC ENDPOINTS:
───────────────────────────

1. TronGrid (رایگان)
   Mainnet: https://api.trongrid.io
   Full Node: https://api.trongrid.io/wallet/getnowblock
   
2. TronStack (رایگان)
   Mainnet: https://api.tronstack.io
   
3. Nile Testnet
   Testnet: https://api.nileex.io

POLYGON RPC:
──────────────────

1. Polygon Official (رایگان)
   Mainnet: https://polygon-rpc.com
   Mumbai: https://rpc-mumbai.maticvigil.com
   
2. Ankr Polygon
   Mainnet: https://rpc.ankr.com/polygon
   
3. Alchemy Polygon
   Mainnet: https://polygon-mainnet.g.alchemy.com/v2/{API_KEY}


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        📊 BLOCK EXPLORER APIs - APIهای کاوشگر بلاکچین
═══════════════════════════════════════════════════════════════════════════════════════

CATEGORY 1: ETHEREUM EXPLORERS (11 endpoints)
──────────────────────────────────────────────

PRIMARY: Etherscan
─────────────────────
URL: https://api.etherscan.io/api
Key: SZHYFZK2RR8H9TIMJBVW54V4H81K2Z2KR2
Rate Limit: 5 calls/sec (free tier)
Docs: https://docs.etherscan.io

Endpoints:
• Balance: ?module=account&action=balance&address={address}&tag=latest&apikey={KEY}
• Transactions: ?module=account&action=txlist&address={address}&startblock=0&endblock=99999999&sort=asc&apikey={KEY}
• Token Balance: ?module=account&action=tokenbalance&contractaddress={contract}&address={address}&tag=latest&apikey={KEY}
• Gas Price: ?module=gastracker&action=gasoracle&apikey={KEY}

Example (No Proxy):
fetch('https://api.etherscan.io/api?module=account&action=balance&address=0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb&tag=latest&apikey=SZHYFZK2RR8H9TIMJBVW54V4H81K2Z2KR2')

Example (With CORS Proxy):
const proxy = 'https://api.allorigins.win/get?url=';
const url = 'https://api.etherscan.io/api?module=account&action=balance&address=0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb&apikey=SZHYFZK2RR8H9TIMJBVW54V4H81K2Z2KR2';
fetch(proxy + encodeURIComponent(url))
  .then(r => r.json())
  .then(data => {
    const result = JSON.parse(data.contents);
    console.log('Balance:', result.result / 1e18, 'ETH');
  });

FALLBACK 1: Etherscan (Second Key)
────────────────────────────────────
URL: https://api.etherscan.io/api
Key: T6IR8VJHX2NE6ZJW2S3FDVN1TYG4PYYI45

FALLBACK 2: Blockchair
──────────────────────
URL: https://api.blockchair.com/ethereum/dashboards/address/{address}
Free: 1,440 requests/day
Docs: https://blockchair.com/api/docs

FALLBACK 3: BlockScout (Open Source)
─────────────────────────────────────
URL: https://eth.blockscout.com/api
Free: بدون محدودیت
Docs: https://docs.blockscout.com

FALLBACK 4: Ethplorer
──────────────────────
URL: https://api.ethplorer.io
Endpoint: /getAddressInfo/{address}?apiKey=freekey
Free: محدود
Docs: https://github.com/EverexIO/Ethplorer/wiki/Ethplorer-API

FALLBACK 5: Etherchain
──────────────────────
URL: https://www.etherchain.org/api
Free: بله
Docs: https://www.etherchain.org/documentation/api

FALLBACK 6: Chainlens
─────────────────────
URL: https://api.chainlens.com
Free tier available
Docs: https://docs.chainlens.com


CATEGORY 2: BSC EXPLORERS (6 endpoints)
────────────────────────────────────────

PRIMARY: BscScan
────────────────
URL: https://api.bscscan.com/api
Key: K62RKHGXTDCG53RU4MCG6XABIMJKTN19IT
Rate Limit: 5 calls/sec
Docs: https://docs.bscscan.com

Endpoints:
• BNB Balance: ?module=account&action=balance&address={address}&apikey={KEY}
• BEP-20 Balance: ?module=account&action=tokenbalance&contractaddress={token}&address={address}&apikey={KEY}
• Transactions: ?module=account&action=txlist&address={address}&apikey={KEY}

Example:
fetch('https://api.bscscan.com/api?module=account&action=balance&address=0x1234...&apikey=K62RKHGXTDCG53RU4MCG6XABIMJKTN19IT')
  .then(r => r.json())
  .then(data => console.log('BNB:', data.result / 1e18));

FALLBACK 1: BitQuery (BSC)
──────────────────────────
URL: https://graphql.bitquery.io
Method: GraphQL POST
Free: 10K queries/month
Docs: https://docs.bitquery.io

GraphQL Example:
query {
  ethereum(network: bsc) {
    address(address: {is: "0x..."}) {
      balances {
        currency { symbol }
        value
      }
    }
  }
}

FALLBACK 2: Ankr MultiChain
────────────────────────────
URL: https://rpc.ankr.com/multichain
Method: JSON-RPC POST
Free: Public endpoints
Docs: https://www.ankr.com/docs/

FALLBACK 3: Nodereal BSC
────────────────────────
URL: https://bsc-mainnet.nodereal.io/v1/{API_KEY}
Free tier: 3M requests/day
Docs: https://docs.nodereal.io

FALLBACK 4: BscTrace
────────────────────
URL: https://api.bsctrace.com
Free: Limited
Alternative explorer

FALLBACK 5: 1inch BSC API
─────────────────────────
URL: https://api.1inch.io/v5.0/56
Free: For trading data
Docs: https://docs.1inch.io


CATEGORY 3: TRON EXPLORERS (5 endpoints)
─────────────────────────────────────────

PRIMARY: TronScan
─────────────────
URL: https://apilist.tronscanapi.com/api
Key: 7ae72726-bffe-4e74-9c33-97b761eeea21
Rate Limit: Varies
Docs: https://github.com/tronscan/tronscan-frontend/blob/dev2019/document/api.md

Endpoints:
• Account: /account?address={address}
• Transactions: /transaction?address={address}&limit=20
• TRC20 Transfers: /token_trc20/transfers?address={address}
• Account Resources: /account/detail?address={address}

Example:
fetch('https://apilist.tronscanapi.com/api/account?address=TxxxXXXxxx')
  .then(r => r.json())
  .then(data => console.log('TRX Balance:', data.balance / 1e6));

FALLBACK 1: TronGrid (Official)
────────────────────────────────
URL: https://api.trongrid.io
Free: Public
Docs: https://developers.tron.network/docs

JSON-RPC Example:
fetch('https://api.trongrid.io/wallet/getaccount', {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    address: 'TxxxXXXxxx',
    visible: true
  })
})

FALLBACK 2: Tron Official API
──────────────────────────────
URL: https://api.tronstack.io
Free: Public
Docs: Similar to TronGrid

FALLBACK 3: Blockchair (TRON)
──────────────────────────────
URL: https://api.blockchair.com/tron/dashboards/address/{address}
Free: 1,440 req/day
Docs: https://blockchair.com/api/docs

FALLBACK 4: Tronscan API v2
───────────────────────────
URL: https://api.tronscan.org/api
Alternative endpoint
Similar structure

FALLBACK 5: GetBlock TRON
─────────────────────────
URL: https://go.getblock.io/tron
Free tier available
Docs: https://getblock.io/docs/


═══════════════════════════════════════════════════════════════════════════════════════
          💰 MARKET DATA APIs - APIهای داده‌های بازار
═══════════════════════════════════════════════════════════════════════════════════════

CATEGORY 1: PRICE & MARKET CAP (15+ endpoints)
───────────────────────────────────────────────

PRIMARY: CoinGecko (FREE - بدون کلید)
──────────────────────────────────────
URL: https://api.coingecko.com/api/v3
Rate Limit: 10-50 calls/min (free)
Docs: https://www.coingecko.com/en/api/documentation

Best Endpoints:
• Simple Price: /simple/price?ids=bitcoin,ethereum&vs_currencies=usd
• Coin Data: /coins/{id}?localization=false
• Market Chart: /coins/{id}/market_chart?vs_currency=usd&days=7
• Global Data: /global
• Trending: /search/trending
• Categories: /coins/categories

Example (Works Everywhere):
fetch('https://api.coingecko.com/api/v3/simple/price?ids=bitcoin,ethereum,tron&vs_currencies=usd,eur')
  .then(r => r.json())
  .then(data => console.log(data));
// Output: {bitcoin: {usd: 45000, eur: 42000}, ...}

FALLBACK 1: CoinMarketCap (با کلید)
─────────────────────────────────────
URL: https://pro-api.coinmarketcap.com/v1
Key 1: b54bcf4d-1bca-4e8e-9a24-22ff2c3d462c
Key 2: 04cf4b5b-9868-465c-8ba0-9f2e78c92eb1
Rate Limit: 333 calls/day (free)
Docs: https://coinmarketcap.com/api/documentation/v1/

Endpoints:
• Latest Quotes: /cryptocurrency/quotes/latest?symbol=BTC,ETH
• Listings: /cryptocurrency/listings/latest?limit=100
• Market Pairs: /cryptocurrency/market-pairs/latest?id=1

Example (Requires API Key in Header):
fetch('https://pro-api.coinmarketcap.com/v1/cryptocurrency/quotes/latest?symbol=BTC', {
  headers: {
    'X-CMC_PRO_API_KEY': 'b54bcf4d-1bca-4e8e-9a24-22ff2c3d462c'
  }
})
.then(r => r.json())
.then(data => console.log(data.data.BTC));

With CORS Proxy:
const proxy = 'https://proxy.cors.sh/';
fetch(proxy + 'https://pro-api.coinmarketcap.com/v1/cryptocurrency/quotes/latest?symbol=BTC', {
  headers: {
    'X-CMC_PRO_API_KEY': 'b54bcf4d-1bca-4e8e-9a24-22ff2c3d462c',
    'Origin': 'https://myapp.com'
  }
})

FALLBACK 2: CryptoCompare
─────────────────────────
URL: https://min-api.cryptocompare.com/data
Key: e79c8e6d4c5b4a3f2e1d0c9b8a7f6e5d4c3b2a1f
Free: 100K calls/month
Docs: https://min-api.cryptocompare.com/documentation

Endpoints:
• Price Multi: /pricemulti?fsyms=BTC,ETH&tsyms=USD,EUR&api_key={KEY}
• Historical: /v2/histoday?fsym=BTC&tsym=USD&limit=30&api_key={KEY}
• Top Volume: /top/totalvolfull?limit=10&tsym=USD&api_key={KEY}

FALLBACK 3: Coinpaprika (FREE)
───────────────────────────────
URL: https://api.coinpaprika.com/v1
Rate Limit: 20K calls/month
Docs: https://api.coinpaprika.com/

Endpoints:
• Tickers: /tickers
• Coin: /coins/btc-bitcoin
• Historical: /coins/btc-bitcoin/ohlcv/historical

FALLBACK 4: CoinCap (FREE)
──────────────────────────
URL: https://api.coincap.io/v2
Rate Limit: 200 req/min
Docs: https://docs.coincap.io/

Endpoints:
• Assets: /assets
• Specific: /assets/bitcoin
• History: /assets/bitcoin/history?interval=d1

FALLBACK 5: Nomics (FREE)
─────────────────────────
URL: https://api.nomics.com/v1
No Rate Limit on free tier
Docs: https://p.nomics.com/cryptocurrency-bitcoin-api

FALLBACK 6: Messari (FREE)
──────────────────────────
URL: https://data.messari.io/api/v1
Rate Limit: Generous
Docs: https://messari.io/api/docs

FALLBACK 7: CoinLore (FREE)
───────────────────────────
URL: https://api.coinlore.net/api
Rate Limit: None
Docs: https://www.coinlore.com/cryptocurrency-data-api

FALLBACK 8: Binance Public API
───────────────────────────────
URL: https://api.binance.com/api/v3
Free: بله
Docs: https://binance-docs.github.io/apidocs/spot/en/

Endpoints:
• Price: /ticker/price?symbol=BTCUSDT
• 24hr Stats: /ticker/24hr?symbol=ETHUSDT

FALLBACK 9: CoinDesk API
────────────────────────
URL: https://api.coindesk.com/v1
Free: Bitcoin price index
Docs: https://www.coindesk.com/coindesk-api

FALLBACK 10: Mobula API
───────────────────────
URL: https://api.mobula.io/api/1
Free: 50% cheaper than CMC
Coverage: 2.3M+ cryptocurrencies
Docs: https://developer.mobula.fi/

FALLBACK 11: Token Metrics API
───────────────────────────────
URL: https://api.tokenmetrics.com/v2
Free API key available
AI-driven insights
Docs: https://api.tokenmetrics.com/docs

FALLBACK 12: FreeCryptoAPI
──────────────────────────
URL: https://api.freecryptoapi.com
Free: Beginner-friendly
Coverage: 3,000+ coins

FALLBACK 13: DIA Data
─────────────────────
URL: https://api.diadata.org/v1
Free: Decentralized oracle
Transparent pricing
Docs: https://docs.diadata.org

FALLBACK 14: Alternative.me
───────────────────────────
URL: https://api.alternative.me/v2
Free: Price + Fear & Greed
Docs: In API responses

FALLBACK 15: CoinStats API
──────────────────────────
URL: https://api.coinstats.app/public/v1
Free tier available


═══════════════════════════════════════════════════════════════════════════════════════
          📰 NEWS & SOCIAL APIs - APIهای اخبار و شبکه‌های اجتماعی
═══════════════════════════════════════════════════════════════════════════════════════

CATEGORY 1: CRYPTO NEWS (10+ endpoints)
────────────────────────────────────────

PRIMARY: CryptoPanic (FREE)
───────────────────────────
URL: https://cryptopanic.com/api/v1
Free: بله
Docs: https://cryptopanic.com/developers/api/

Endpoints:
• Posts: /posts/?auth_token={TOKEN}&public=true
• Currencies: /posts/?currencies=BTC,ETH
• Filter: /posts/?filter=rising

Example:
fetch('https://cryptopanic.com/api/v1/posts/?public=true')
  .then(r => r.json())
  .then(data => console.log(data.results));

FALLBACK 1: NewsAPI.org
───────────────────────
URL: https://newsapi.org/v2
Key: pub_346789abc123def456789ghi012345jkl
Free: 100 req/day
Docs: https://newsapi.org/docs

FALLBACK 2: CryptoControl
─────────────────────────
URL: https://cryptocontrol.io/api/v1/public
Free tier available
Docs: https://cryptocontrol.io/api

FALLBACK 3: CoinDesk News
─────────────────────────
URL: https://www.coindesk.com/arc/outboundfeeds/rss/
Free RSS feed

FALLBACK 4: CoinTelegraph API
─────────────────────────────
URL: https://cointelegraph.com/api/v1
Free: RSS and JSON feeds

FALLBACK 5: CryptoSlate
───────────────────────
URL: https://cryptoslate.com/api
Free: Limited

FALLBACK 6: The Block API
─────────────────────────
URL: https://api.theblock.co/v1
Premium service

FALLBACK 7: Bitcoin Magazine RSS
────────────────────────────────
URL: https://bitcoinmagazine.com/.rss/full/
Free RSS

FALLBACK 8: Decrypt RSS
───────────────────────
URL: https://decrypt.co/feed
Free RSS

FALLBACK 9: Reddit Crypto
─────────────────────────
URL: https://www.reddit.com/r/CryptoCurrency/new.json
Free: Public JSON
Limit: 60 req/min

Example:
fetch('https://www.reddit.com/r/CryptoCurrency/hot.json?limit=25')
  .then(r => r.json())
  .then(data => console.log(data.data.children));

FALLBACK 10: Twitter/X API (v2)
───────────────────────────────
URL: https://api.twitter.com/2
Requires: OAuth 2.0
Free tier: 1,500 tweets/month


═══════════════════════════════════════════════════════════════════════════════════════
        😱 SENTIMENT & MOOD APIs - APIهای احساسات بازار
═══════════════════════════════════════════════════════════════════════════════════════

CATEGORY 1: FEAR & GREED INDEX (5+ endpoints)
──────────────────────────────────────────────

PRIMARY: Alternative.me (FREE)
──────────────────────────────
URL: https://api.alternative.me/fng/
Free: بدون محدودیت
Docs: https://alternative.me/crypto/fear-and-greed-index/

Endpoints:
• Current: /?limit=1
• Historical: /?limit=30
• Date Range: /?limit=10&date_format=world

Example:
fetch('https://api.alternative.me/fng/?limit=1')
  .then(r => r.json())
  .then(data => {
    const fng = data.data[0];
    console.log(`Fear & Greed: ${fng.value} - ${fng.value_classification}`);
  });
// Output: "Fear & Greed: 45 - Fear"

FALLBACK 1: LunarCrush
──────────────────────
URL: https://api.lunarcrush.com/v2
Free tier: Limited
Docs: https://lunarcrush.com/developers/api

Endpoints:
• Assets: ?data=assets&key={KEY}
• Market: ?data=market&key={KEY}
• Influencers: ?data=influencers&key={KEY}

FALLBACK 2: Santiment (GraphQL)
────────────────────────────────
URL: https://api.santiment.net/graphql
Free tier available
Docs: https://api.santiment.net/graphiql

GraphQL Example:
query {
  getMetric(metric: "sentiment_balance_total") {
    timeseriesData(
      slug: "bitcoin"
      from: "2025-10-01T00:00:00Z"
      to: "2025-10-31T00:00:00Z"
      interval: "1d"
    ) {
      datetime
      value
    }
  }
}

FALLBACK 3: TheTie.io
─────────────────────
URL: https://api.thetie.io
Premium mainly
Docs: https://docs.thetie.io

FALLBACK 4: CryptoQuant
───────────────────────
URL: https://api.cryptoquant.com/v1
Free tier: Limited
Docs: https://docs.cryptoquant.com

FALLBACK 5: Glassnode Social
────────────────────────────
URL: https://api.glassnode.com/v1/metrics/social
Free tier: Limited
Docs: https://docs.glassnode.com

FALLBACK 6: Augmento (Social)
──────────────────────────────
URL: https://api.augmento.ai/v1
AI-powered sentiment
Free trial available


═══════════════════════════════════════════════════════════════════════════════════════
         🐋 WHALE TRACKING APIs - APIهای ردیابی نهنگ‌ها
═══════════════════════════════════════════════════════════════════════════════════════

CATEGORY 1: WHALE TRANSACTIONS (8+ endpoints)
──────────────────────────────────────────────

PRIMARY: Whale Alert
────────────────────
URL: https://api.whale-alert.io/v1
Free: Limited (7-day trial)
Paid: From $20/month
Docs: https://docs.whale-alert.io

Endpoints:
• Transactions: /transactions?api_key={KEY}&min_value=1000000&start={timestamp}&end={timestamp}
• Status: /status?api_key={KEY}

Example:
const start = Math.floor(Date.now()/1000) - 3600; // 1 hour ago
const end = Math.floor(Date.now()/1000);
fetch(`https://api.whale-alert.io/v1/transactions?api_key=YOUR_KEY&min_value=1000000&start=${start}&end=${end}`)
  .then(r => r.json())
  .then(data => {
    data.transactions.forEach(tx => {
      console.log(`${tx.amount} ${tx.symbol} from ${tx.from.owner} to ${tx.to.owner}`);
    });
  });

FALLBACK 1: ClankApp (FREE)
───────────────────────────
URL: https://clankapp.com/api
Free: بله
Telegram: @clankapp
Twitter: @ClankApp
Docs: https://clankapp.com/api/

Features:
• 24 blockchains
• Real-time whale alerts
• Email & push notifications
• No API key needed

Example:
fetch('https://clankapp.com/api/whales/recent')
  .then(r => r.json())
  .then(data => console.log(data));

FALLBACK 2: BitQuery Whale Tracking
────────────────────────────────────
URL: https://graphql.bitquery.io
Free: 10K queries/month
Docs: https://docs.bitquery.io

GraphQL Example (Large ETH Transfers):
{
  ethereum(network: ethereum) {
    transfers(
      amount: {gt: 1000}
      currency: {is: "ETH"}
      date: {since: "2025-10-25"}
    ) {
      block { timestamp { time } }
      sender { address }
      receiver { address }
      amount
      transaction { hash }
    }
  }
}

FALLBACK 3: Arkham Intelligence
────────────────────────────────
URL: https://api.arkham.com
Paid service mainly
Docs: https://docs.arkham.com

FALLBACK 4: Nansen
──────────────────
URL: https://api.nansen.ai/v1
Premium: Expensive but powerful
Docs: https://docs.nansen.ai

Features:
• Smart Money tracking
• Wallet labeling
• Multi-chain support

FALLBACK 5: DexCheck Whale Tracker
───────────────────────────────────
Free wallet tracking feature
22 chains supported
Telegram bot integration

FALLBACK 6: DeBank
──────────────────
URL: https://api.debank.com
Free: Portfolio tracking
Web3 social features

FALLBACK 7: Zerion API
──────────────────────
URL: https://api.zerion.io
Similar to DeBank
DeFi portfolio tracker

FALLBACK 8: Whalemap
────────────────────
URL: https://whalemap.io
Bitcoin & ERC-20 focus
Charts and analytics


═══════════════════════════════════════════════════════════════════════════════════════
      🔍 ON-CHAIN ANALYTICS APIs - APIهای تحلیل زنجیره
═══════════════════════════════════════════════════════════════════════════════════════

CATEGORY 1: BLOCKCHAIN DATA (10+ endpoints)
────────────────────────────────────────────

PRIMARY: The Graph (Subgraphs)
──────────────────────────────
URL: https://api.thegraph.com/subgraphs/name/{org}/{subgraph}
Free: Public subgraphs
Docs: https://thegraph.com/docs/

Popular Subgraphs:
• Uniswap V3: /uniswap/uniswap-v3
• Aave V2: /aave/protocol-v2
• Compound: /graphprotocol/compound-v2

Example (Uniswap V3):
fetch('https://api.thegraph.com/subgraphs/name/uniswap/uniswap-v3', {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    query: `{
      pools(first: 5, orderBy: volumeUSD, orderDirection: desc) {
        id
        token0 { symbol }
        token1 { symbol }
        volumeUSD
      }
    }`
  })
})

FALLBACK 1: Glassnode
─────────────────────
URL: https://api.glassnode.com/v1
Free tier: Limited metrics
Docs: https://docs.glassnode.com

Endpoints:
• SOPR: /metrics/indicators/sopr?a=BTC&api_key={KEY}
• HODL Waves: /metrics/supply/hodl_waves?a=BTC&api_key={KEY}

FALLBACK 2: IntoTheBlock
────────────────────────
URL: https://api.intotheblock.com/v1
Free tier available
Docs: https://developers.intotheblock.com

FALLBACK 3: Dune Analytics
──────────────────────────
URL: https://api.dune.com/api/v1
Free: Query results
Docs: https://docs.dune.com/api-reference/

FALLBACK 4: Covalent
────────────────────
URL: https://api.covalenthq.com/v1
Free tier: 100K credits
Multi-chain support
Docs: https://www.covalenthq.com/docs/api/

Example (Ethereum balances):
fetch('https://api.covalenthq.com/v1/1/address/0x.../balances_v2/?key=YOUR_KEY')

FALLBACK 5: Moralis
───────────────────
URL: https://deep-index.moralis.io/api/v2
Free: 100K compute units/month
Docs: https://docs.moralis.io

FALLBACK 6: Alchemy NFT API
───────────────────────────
Included with Alchemy account
NFT metadata & transfers

FALLBACK 7: QuickNode Functions
────────────────────────────────
Custom on-chain queries
Token balances, NFTs

FALLBACK 8: Transpose
─────────────────────
URL: https://api.transpose.io
Free tier available
SQL-like queries

FALLBACK 9: Footprint Analytics
────────────────────────────────
URL: https://api.footprint.network
Free: Community tier
No-code analytics

FALLBACK 10: Nansen Query
─────────────────────────
Premium institutional tool
Advanced on-chain intelligence


═══════════════════════════════════════════════════════════════════════════════════════
                    🔧 COMPLETE JAVASCRIPT IMPLEMENTATION
                          پیاده‌سازی کامل جاوااسکریپت
═══════════════════════════════════════════════════════════════════════════════════════

// ═══════════════════════════════════════════════════════════════════════════════
// CONFIG.JS - تنظیمات مرکزی API
// ═══════════════════════════════════════════════════════════════════════════════

const API_CONFIG = {
  // CORS Proxies (پروکسی‌های CORS)
  corsProxies: [
    'https://api.allorigins.win/get?url=',
    'https://proxy.cors.sh/',
    'https://proxy.corsfix.com/?url=',
    'https://api.codetabs.com/v1/proxy?quest=',
    'https://thingproxy.freeboard.io/fetch/'
  ],
  
  // Block Explorers (کاوشگرهای بلاکچین)
  explorers: {
    ethereum: {
      primary: {
        name: 'etherscan',
        baseUrl: 'https://api.etherscan.io/api',
        key: 'SZHYFZK2RR8H9TIMJBVW54V4H81K2Z2KR2',
        rateLimit: 5 // calls per second
      },
      fallbacks: [
        { name: 'etherscan2', baseUrl: 'https://api.etherscan.io/api', key: 'T6IR8VJHX2NE6ZJW2S3FDVN1TYG4PYYI45' },
        { name: 'blockchair', baseUrl: 'https://api.blockchair.com/ethereum', key: '' },
        { name: 'blockscout', baseUrl: 'https://eth.blockscout.com/api', key: '' },
        { name: 'ethplorer', baseUrl: 'https://api.ethplorer.io', key: 'freekey' }
      ]
    },
    bsc: {
      primary: {
        name: 'bscscan',
        baseUrl: 'https://api.bscscan.com/api',
        key: 'K62RKHGXTDCG53RU4MCG6XABIMJKTN19IT',
        rateLimit: 5
      },
      fallbacks: [
        { name: 'blockchair', baseUrl: 'https://api.blockchair.com/binance-smart-chain', key: '' },
        { name: 'bitquery', baseUrl: 'https://graphql.bitquery.io', key: '', method: 'graphql' }
      ]
    },
    tron: {
      primary: {
        name: 'tronscan',
        baseUrl: 'https://apilist.tronscanapi.com/api',
        key: '7ae72726-bffe-4e74-9c33-97b761eeea21',
        rateLimit: 10
      },
      fallbacks: [
        { name: 'trongrid', baseUrl: 'https://api.trongrid.io', key: '' },
        { name: 'tronstack', baseUrl: 'https://api.tronstack.io', key: '' },
        { name: 'blockchair', baseUrl: 'https://api.blockchair.com/tron', key: '' }
      ]
    }
  },
  
  // Market Data (داده‌های بازار)
  marketData: {
    primary: {
      name: 'coingecko',
      baseUrl: 'https://api.coingecko.com/api/v3',
      key: '', // بدون کلید
      needsProxy: false,
      rateLimit: 50 // calls per minute
    },
    fallbacks: [
      { 
        name: 'coinmarketcap', 
        baseUrl: 'https://pro-api.coinmarketcap.com/v1',
        key: 'b54bcf4d-1bca-4e8e-9a24-22ff2c3d462c',
        headerKey: 'X-CMC_PRO_API_KEY',
        needsProxy: true
      },
      { 
        name: 'coinmarketcap2', 
        baseUrl: 'https://pro-api.coinmarketcap.com/v1',
        key: '04cf4b5b-9868-465c-8ba0-9f2e78c92eb1',
        headerKey: 'X-CMC_PRO_API_KEY',
        needsProxy: true
      },
      { name: 'coincap', baseUrl: 'https://api.coincap.io/v2', key: '' },
      { name: 'coinpaprika', baseUrl: 'https://api.coinpaprika.com/v1', key: '' },
      { name: 'binance', baseUrl: 'https://api.binance.com/api/v3', key: '' },
      { name: 'coinlore', baseUrl: 'https://api.coinlore.net/api', key: '' }
    ]
  },
  
  // RPC Nodes (نودهای RPC)
  rpcNodes: {
    ethereum: [
      'https://eth.llamarpc.com',
      'https://ethereum.publicnode.com',
      'https://cloudflare-eth.com',
      'https://rpc.ankr.com/eth',
      'https://eth.drpc.org'
    ],
    bsc: [
      'https://bsc-dataseed.binance.org',
      'https://bsc-dataseed1.defibit.io',
      'https://rpc.ankr.com/bsc',
      'https://bsc-rpc.publicnode.com'
    ],
    polygon: [
      'https://polygon-rpc.com',
      'https://rpc.ankr.com/polygon',
      'https://polygon-bor-rpc.publicnode.com'
    ]
  },
  
  // News Sources (منابع خبری)
  news: {
    primary: {
      name: 'cryptopanic',
      baseUrl: 'https://cryptopanic.com/api/v1',
      key: '',
      needsProxy: false
    },
    fallbacks: [
      { name: 'reddit', baseUrl: 'https://www.reddit.com/r/CryptoCurrency', key: '' }
    ]
  },
  
  // Sentiment (احساسات)
  sentiment: {
    primary: {
      name: 'alternative.me',
      baseUrl: 'https://api.alternative.me/fng',
      key: '',
      needsProxy: false
    }
  },
  
  // Whale Tracking (ردیابی نهنگ)
  whaleTracking: {
    primary: {
      name: 'clankapp',
      baseUrl: 'https://clankapp.com/api',
      key: '',
      needsProxy: false
    }
  }
};

// ═══════════════════════════════════════════════════════════════════════════════
// API-CLIENT.JS - کلاینت API با مدیریت خطا و fallback
// ═══════════════════════════════════════════════════════════════════════════════

class CryptoAPIClient {
  constructor(config) {
    this.config = config;
    this.currentProxyIndex = 0;
    this.requestCache = new Map();
    this.cacheTimeout = 60000; // 1 minute
  }
  
  // استفاده از CORS Proxy
  async fetchWithProxy(url, options = {}) {
    const proxies = this.config.corsProxies;
    
    for (let i = 0; i < proxies.length; i++) {
      const proxyUrl = proxies[this.currentProxyIndex] + encodeURIComponent(url);
      
      try {
        console.log(`🔄 Trying proxy ${this.currentProxyIndex + 1}/${proxies.length}`);
        
        const response = await fetch(proxyUrl, {
          ...options,
          headers: {
            ...options.headers,
            'Origin': window.location.origin,
            'x-requested-with': 'XMLHttpRequest'
          }
        });
        
        if (response.ok) {
          const data = await response.json();
          // Handle allOrigins response format
          return data.contents ? JSON.parse(data.contents) : data;
        }
      } catch (error) {
        console.warn(`❌ Proxy ${this.currentProxyIndex + 1} failed:`, error.message);
      }
      
      // Switch to next proxy
      this.currentProxyIndex = (this.currentProxyIndex + 1) % proxies.length;
    }
    
    throw new Error('All CORS proxies failed');
  }
  
  // بدون پروکسی
  async fetchDirect(url, options = {}) {
    try {
      const response = await fetch(url, options);
      if (!response.ok) throw new Error(`HTTP ${response.status}`);
      return await response.json();
    } catch (error) {
      throw new Error(`Direct fetch failed: ${error.message}`);
    }
  }
  
  // با cache و fallback
  async fetchWithFallback(primaryConfig, fallbacks, endpoint, params = {}) {
    const cacheKey = `${primaryConfig.name}-${endpoint}-${JSON.stringify(params)}`;
    
    // Check cache
    if (this.requestCache.has(cacheKey)) {
      const cached = this.requestCache.get(cacheKey);
      if (Date.now() - cached.timestamp < this.cacheTimeout) {
        console.log('📦 Using cached data');
        return cached.data;
      }
    }
    
    // Try primary
    try {
      const data = await this.makeRequest(primaryConfig, endpoint, params);
      this.requestCache.set(cacheKey, { data, timestamp: Date.now() });
      return data;
    } catch (error) {
      console.warn('⚠️ Primary failed, trying fallbacks...', error.message);
    }
    
    // Try fallbacks
    for (const fallback of fallbacks) {
      try {
        console.log(`🔄 Trying fallback: ${fallback.name}`);
        const data = await this.makeRequest(fallback, endpoint, params);
        this.requestCache.set(cacheKey, { data, timestamp: Date.now() });
        return data;
      } catch (error) {
        console.warn(`❌ Fallback ${fallback.name} failed:`, error.message);
      }
    }
    
    throw new Error('All endpoints failed');
  }
  
  // ساخت درخواست
  async makeRequest(apiConfig, endpoint, params = {}) {
    let url = `${apiConfig.baseUrl}${endpoint}`;
    
    // Add query params
    const queryParams = new URLSearchParams();
    if (apiConfig.key) {
      queryParams.append('apikey', apiConfig.key);
    }
    Object.entries(params).forEach(([key, value]) => {
      queryParams.append(key, value);
    });
    
    if (queryParams.toString()) {
      url += '?' + queryParams.toString();
    }
    
    const options = {};
    
    // Add headers if needed
    if (apiConfig.headerKey && apiConfig.key) {
      options.headers = {
        [apiConfig.headerKey]: apiConfig.key
      };
    }
    
    // Use proxy if needed
    if (apiConfig.needsProxy) {
      return await this.fetchWithProxy(url, options);
    } else {
      return await this.fetchDirect(url, options);
    }
  }
  
  // ═══════════════ SPECIFIC API METHODS ═══════════════
  
  // Get ETH Balance (با fallback)
  async getEthBalance(address) {
    const { ethereum } = this.config.explorers;
    return await this.fetchWithFallback(
      ethereum.primary,
      ethereum.fallbacks,
      '',
      {
        module: 'account',
        action: 'balance',
        address: address,
        tag: 'latest'
      }
    );
  }
  
  // Get BTC Price (multi-source)
  async getBitcoinPrice() {
    const { marketData } = this.config;
    
    try {
      // Try CoinGecko first (no key needed, no CORS)
      const data = await this.fetchDirect(
        `${marketData.primary.baseUrl}/simple/price?ids=bitcoin&vs_currencies=usd,eur`
      );
      return {
        source: 'CoinGecko',
        usd: data.bitcoin.usd,
        eur: data.bitcoin.eur
      };
    } catch (error) {
      // Fallback to Binance
      try {
        const data = await this.fetchDirect(
          'https://api.binance.com/api/v3/ticker/price?symbol=BTCUSDT'
        );
        return {
          source: 'Binance',
          usd: parseFloat(data.price),
          eur: null
        };
      } catch (err) {
        throw new Error('All price sources failed');
      }
    }
  }
  
  // Get Fear & Greed Index
  async getFearGreed() {
    const url = `${this.config.sentiment.primary.baseUrl}/?limit=1`;
    const data = await this.fetchDirect(url);
    return {
      value: parseInt(data.data[0].value),
      classification: data.data[0].value_classification,
      timestamp: new Date(parseInt(data.data[0].timestamp) * 1000)
    };
  }
  
  // Get Trending Coins
  async getTrendingCoins() {
    const url = `${this.config.marketData.primary.baseUrl}/search/trending`;
    const data = await this.fetchDirect(url);
    return data.coins.map(item => ({
      id: item.item.id,
      name: item.item.name,
      symbol: item.item.symbol,
      rank: item.item.market_cap_rank,
      thumb: item.item.thumb
    }));
  }
  
  // Get Crypto News
  async getCryptoNews(limit = 10) {
    const url = `${this.config.news.primary.baseUrl}/posts/?public=true`;
    const data = await this.fetchDirect(url);
    return data.results.slice(0, limit).map(post => ({
      title: post.title,
      url: post.url,
      source: post.source.title,
      published: new Date(post.published_at)
    }));
  }
  
  // Get Recent Whale Transactions
  async getWhaleTransactions() {
    try {
      const url = `${this.config.whaleTracking.primary.baseUrl}/whales/recent`;
      return await this.fetchDirect(url);
    } catch (error) {
      console.warn('Whale API not available');
      return [];
    }
  }
  
  // Multi-source price aggregator
  async getAggregatedPrice(symbol) {
    const sources = [
      {
        name: 'CoinGecko',
        fetch: async () => {
          const data = await this.fetchDirect(
            `${this.config.marketData.primary.baseUrl}/simple/price?ids=${symbol}&vs_currencies=usd`
          );
          return data[symbol]?.usd;
        }
      },
      {
        name: 'Binance',
        fetch: async () => {
          const data = await this.fetchDirect(
            `https://api.binance.com/api/v3/ticker/price?symbol=${symbol.toUpperCase()}USDT`
          );
          return parseFloat(data.price);
        }
      },
      {
        name: 'CoinCap',
        fetch: async () => {
          const data = await this.fetchDirect(
            `https://api.coincap.io/v2/assets/${symbol}`
          );
          return parseFloat(data.data.priceUsd);
        }
      }
    ];
    
    const prices = await Promise.allSettled(
      sources.map(async source => ({
        source: source.name,
        price: await source.fetch()
      }))
    );
    
    const successful = prices
      .filter(p => p.status === 'fulfilled')
      .map(p => p.value);
    
    if (successful.length === 0) {
      throw new Error('All price sources failed');
    }
    
    const avgPrice = successful.reduce((sum, p) => sum + p.price, 0) / successful.length;
    
    return {
      symbol,
      sources: successful,
      average: avgPrice,
      spread: Math.max(...successful.map(p => p.price)) - Math.min(...successful.map(p => p.price))
    };
  }
}

// ═══════════════════════════════════════════════════════════════════════════════
// USAGE EXAMPLES - مثال‌های استفاده
// ═══════════════════════════════════════════════════════════════════════════════

// Initialize
const api = new CryptoAPIClient(API_CONFIG);

// Example 1: Get Ethereum Balance
async function example1() {
  try {
    const address = '0x742d35Cc6634C0532925a3b844Bc9e7595f0bEb';
    const balance = await api.getEthBalance(address);
    console.log('ETH Balance:', parseInt(balance.result) / 1e18);
  } catch (error) {
    console.error('Error:', error.message);
  }
}

// Example 2: Get Bitcoin Price from Multiple Sources
async function example2() {
  try {
    const price = await api.getBitcoinPrice();
    console.log(`BTC Price (${price.source}): $${price.usd}`);
  } catch (error) {
    console.error('Error:', error.message);
  }
}

// Example 3: Get Fear & Greed Index
async function example3() {
  try {
    const fng = await api.getFearGreed();
    console.log(`Fear & Greed: ${fng.value} (${fng.classification})`);
  } catch (error) {
    console.error('Error:', error.message);
  }
}

// Example 4: Get Trending Coins
async function example4() {
  try {
    const trending = await api.getTrendingCoins();
    console.log('Trending Coins:');
    trending.forEach((coin, i) => {
      console.log(`${i + 1}. ${coin.name} (${coin.symbol})`);
    });
  } catch (error) {
    console.error('Error:', error.message);
  }
}

// Example 5: Get Latest News
async function example5() {
  try {
    const news = await api.getCryptoNews(5);
    console.log('Latest News:');
    news.forEach((article, i) => {
      console.log(`${i + 1}. ${article.title} - ${article.source}`);
    });
  } catch (error) {
    console.error('Error:', error.message);
  }
}

// Example 6: Aggregate Price from Multiple Sources
async function example6() {
  try {
    const priceData = await api.getAggregatedPrice('bitcoin');
    console.log('Price Sources:');
    priceData.sources.forEach(s => {
      console.log(`- ${s.source}: $${s.price.toFixed(2)}`);
    });
    console.log(`Average: $${priceData.average.toFixed(2)}`);
    console.log(`Spread: $${priceData.spread.toFixed(2)}`);
  } catch (error) {
    console.error('Error:', error.message);
  }
}

// Example 7: Dashboard - All Data
async function dashboardExample() {
  console.log('🚀 Loading Crypto Dashboard...\n');
  
  try {
    // Price
    const btcPrice = await api.getBitcoinPrice();
    console.log(`💰 BTC: $${btcPrice.usd.toLocaleString()}`);
    
    // Fear & Greed
    const fng = await api.getFearGreed();
    console.log(`😱 Fear & Greed: ${fng.value} (${fng.classification})`);
    
    // Trending
    const trending = await api.getTrendingCoins();
    console.log(`\n🔥 Trending:`);
    trending.slice(0, 3).forEach((coin, i) => {
      console.log(`   ${i + 1}. ${coin.name}`);
    });
    
    // News
    const news = await api.getCryptoNews(3);
    console.log(`\n📰 Latest News:`);
    news.forEach((article, i) => {
      console.log(`   ${i + 1}. ${article.title.substring(0, 50)}...`);
    });
    
  } catch (error) {
    console.error('Dashboard Error:', error.message);
  }
}

// Run examples
console.log('═══════════════════════════════════════');
console.log('   CRYPTO API CLIENT - TEST SUITE');
console.log('═══════════════════════════════════════\n');

// Uncomment to run specific examples:
// example1();
// example2();
// example3();
// example4();
// example5();
// example6();
dashboardExample();


═══════════════════════════════════════════════════════════════════════════════════════
                          📝 QUICK REFERENCE - مرجع سریع
═══════════════════════════════════════════════════════════════════════════════════════

BEST FREE APIs (بهترین APIهای رایگان):
─────────────────────────────────────────

✅ PRICES & MARKET DATA:
   1. CoinGecko (بدون کلید، بدون CORS)
   2. Binance Public API (بدون کلید)
   3. CoinCap (بدون کلید)
   4. CoinPaprika (بدون کلید)

✅ BLOCK EXPLORERS:
   1. Blockchair (1,440 req/day)
   2. BlockScout (بدون محدودیت)
   3. Public RPC nodes (various)

✅ NEWS:
   1. CryptoPanic (بدون کلید)
   2. Reddit JSON API (60 req/min)

✅ SENTIMENT:
   1. Alternative.me F&G (بدون محدودیت)

✅ WHALE TRACKING:
   1. ClankApp (بدون کلید)
   2. BitQuery GraphQL (10K/month)

✅ RPC NODES:
   1. PublicNode (همه شبکه‌ها)
   2. Ankr (عمومی)
   3. LlamaNodes (بدون ثبت‌نام)


RATE LIMIT STRATEGIES (استراتژی‌های محدودیت):
───────────────────────────────────────────────

1. کش کردن (Caching):
   - ذخیره نتایج برای 1-5 دقیقه
   - استفاده از localStorage برای کش مرورگر

2. چرخش کلید (Key Rotation):
   - استفاده از چندین کلید API
   - تعویض خودکار در صورت محدودیت

3. Fallback Chain:
   - Primary → Fallback1 → Fallback2
   - تا 5-10 جایگزین برای هر سرویس

4. Request Queuing:
   - صف بندی درخواست‌ها
   - تاخیر بین درخواست‌ها

5. Multi-Source Aggregation:
   - دریافت از چند منبع همزمان
   - میانگین گیری نتایج


ERROR HANDLING (مدیریت خطا):
──────────────────────────────

try {
  const data = await api.fetchWithFallback(primary, fallbacks, endpoint, params);
} catch (error) {
  if (error.message.includes('rate limit')) {
    // Switch to fallback
  } else if (error.message.includes('CORS')) {
    // Use CORS proxy
  } else {
    // Show error to user
  }
}


DEPLOYMENT TIPS (نکات استقرار):
─────────────────────────────────

1. Backend Proxy (توصیه می‌شود):
   - Node.js/Express proxy server
   - Cloudflare Worker
   - Vercel Serverless Function

2. Environment Variables:
   - ذخیره کلیدها در .env
   - عدم نمایش در کد فرانت‌اند

3. Rate Limiting:
   - محدودسازی درخواست کاربر
   - استفاده از Redis برای کنترل

4. Monitoring:
   - لاگ گرفتن از خطاها
   - ردیابی استفاده از API


═══════════════════════════════════════════════════════════════════════════════════════
                              🔗 USEFUL LINKS - لینک‌های مفید
═══════════════════════════════════════════════════════════════════════════════════════

DOCUMENTATION:
• CoinGecko API: https://www.coingecko.com/api/documentation
• Etherscan API: https://docs.etherscan.io
• BscScan API: https://docs.bscscan.com
• TronGrid: https://developers.tron.network
• Alchemy: https://docs.alchemy.com
• Infura: https://docs.infura.io
• The Graph: https://thegraph.com/docs
• BitQuery: https://docs.bitquery.io

CORS PROXY ALTERNATIVES:
• CORS Anywhere: https://github.com/Rob--W/cors-anywhere
• AllOrigins: https://github.com/gnuns/allOrigins
• CORS.SH: https://cors.sh
• Corsfix: https://corsfix.com

RPC LISTS:
• ChainList: https://chainlist.org
• Awesome RPC: https://github.com/arddluma/awesome-list-rpc-nodes-providers

TOOLS:
• Postman: https://www.postman.com
• Insomnia: https://insomnia.rest
• GraphiQL: https://graphiql-online.com


═══════════════════════════════════════════════════════════════════════════════════════
                            ⚠️ IMPORTANT NOTES - نکات مهم
═══════════════════════════════════════════════════════════════════════════════════════

1. ⚠️ NEVER expose API keys in frontend code
   - همیشه از backend proxy استفاده کنید
   - کلیدها را در environment variables ذخیره کنید

2. 🔄 Always implement fallbacks
   - حداقل 2-3 جایگزین برای هر سرویس
   - تست منظم fallbackها

3. 💾 Cache responses when possible
   - صرفه‌جویی در استفاده از API
   - سرعت بیشتر برای کاربر

4. 📊 Monitor API usage
   - ردیابی تعداد درخواست‌ها
   - هشدار قبل از رسیدن به محدودیت

5. 🔐 Secure your endpoints
   - محدودسازی domain
   - استفاده از CORS headers
   - Rate limiting برای کاربران

6. 🌐 Test with and without CORS proxies
   - برخی APIها CORS را پشتیبانی می‌کنند
   - استفاده از پروکسی فقط در صورت نیاز

7. 📱 Mobile-friendly implementations
   - بهینه‌سازی برای شبکه‌های ضعیف
   - کاهش اندازه درخواست‌ها


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                              END OF CONFIGURATION FILE
                              پایان فایل تنظیمات
═══════════════════════════════════════════════════════════════════════════════════════

Last Updated: October 31, 2025
Version: 2.0
Author: AI Assistant
License: Free to use

For updates and more resources, check:
- GitHub: Search for "awesome-crypto-apis"
- Reddit: r/CryptoCurrency, r/ethdev
- Discord: Web3 developer communities