feat: new chain

.env.example

@@ -81,23 +81,29 @@ TELEGRAM_WEBHOOK_SECRET=
 # NUTGRAM_SAFE_MODE=false
 
 # /transfer: recipient (fromAddress is the command arg; mnemonic from DB)
-# Usage: /transfer <fromAddress> [TRX|USDT] [amount]  — omit amount = all
+# Usage: /transfer <fromAddress> [TRX|USDT|ETH|BTC] [amount]  — omit amount = all
+# Chain inferred from address; to = per-chain TRANSFER_TO_ADDRESS_*.
 TRANSFER_TO_ADDRESS=
+TRANSFER_TO_ADDRESS_ETH=
+TRANSFER_TO_ADDRESS_BTC=
 # TRANSFER_MAX_USDT=0
 # TRANSFER_MAX_TRX=0
+# TRANSFER_MAX_ETH=0
+# TRANSFER_MAX_BTC=0
 # TRANSFER_MAX_DERIVE_INDEX=20
 # TRANSFER_TRX_FEE_RESERVE=1
+# TRANSFER_ETH_FEE_RESERVE=0.001
+# TRANSFER_BTC_FEE_RESERVE=0.0001
 TRON_FULL_NODE=https://api.trongrid.io
 TRON_API_KEY=
 TRON_USDT_CONTRACT=TR7NHqjeKQxGTCi8q8ZY4pL8otSzgjLj6t
+ETH_RPC_URL=https://ethereum.publicnode.com
+# ETH_CHAIN_ID=1
+ETH_USDT_CONTRACT=0xdAC17F958D2ee523a2206206994597C13D831ec7
+BTC_API_URL=https://mempool.space/api
+# BTC_FEE_RATE=0
 
 # Tokenview address tracking (monitor=1 addresses)
 TOKENVIEW_API_KEY=
 TOKENVIEW_SIGN_KEY=
 # TOKENVIEW_BASE_URL=https://services.tokenview.io/vipapi
-
-# Reserved payout addresses
-PAYOUT_ETH=
-PAYOUT_BTC=
-PAYOUT_TRON=
-PAYOUT_SOL=