feat: add priority fee support with dynamic/fixed options, hard cap, and extra fee

config.py

@@ -3,11 +3,18 @@ Configuration for the pump.fun trading bot.
 """
 
 # Trading parameters
-BUY_AMOUNT = 0.000001  # Amount of SOL to spend when buying
-BUY_SLIPPAGE = 0.4  # 40% slippage tolerance for buying
-SELL_SLIPPAGE = 0.4  # 40% slippage tolerance for selling
-ENABLE_DYNAMIC_PRIORITY_FEE = True  # TODO: not implemented. getRecentPriorityFee is used to get current priority fee
-EXTRA_PRIORITY_FEE = 0.1  # TODO: not implemented. 10% increase in dynamic priority fee
+BUY_AMOUNT: float = 0.000001  # Amount of SOL to spend when buying
+BUY_SLIPPAGE: float = 0.4  # 40% slippage tolerance for buying
+SELL_SLIPPAGE: float = 0.4  # 40% slippage tolerance for selling
+
+# Configuration for priority fee settings
+ENABLE_DYNAMIC_PRIORITY_FEE: bool = True  # Enable dynamic priority fee calculation
+ENABLE_FIXED_PRIORITY_FEE: bool = True  # Enable fixed priority fee
+FIXED_PRIORITY_FEE: int = 200000  # Fixed priority fee in lamports (0 means no fee)
+EXTRA_PRIORITY_FEE: float = (
+    0.1  # Percentage increase applied to priority fee (0.1 = 10%)
+)
+HARD_CAP_PRIOR_FEE: int = 1000000  # Maximum allowed priority fee in lamports (hard cap)
 
 # Retries and timeouts
 MAX_RETRIES: int = 2
@@ -22,6 +29,24 @@ MAX_TOKEN_AGE: float = 0.1
 
 # Node provier configuration
 # You can also get a trader node https://docs.chainstack.com/docs/solana-trader-nodes
-MAX_RPS = 25  # TODO: not implemented. Max RPS to avoid rate limit errors
+MAX_RPS: int = 25  # TODO: not implemented. Max RPS to avoid rate limit errors
 PUBLIC_RPC_ENDPOINT = "https://api.mainnet-beta.solana.com"
 PUBLIC_WSS_ENDPOINT = "wss://api.mainnet-beta.solana.com"
+
+
+def validate_priority_fee_config() -> None:
+    """Validate priority fee configuration values."""
+    if not isinstance(ENABLE_DYNAMIC_PRIORITY_FEE, bool):
+        raise ValueError("ENABLE_DYNAMIC_PRIORITY_FEE must be a boolean")
+    if not isinstance(ENABLE_FIXED_PRIORITY_FEE, bool):
+        raise ValueError("ENABLE_FIXED_PRIORITY_FEE must be a boolean")
+    if not isinstance(FIXED_PRIORITY_FEE, int) or FIXED_PRIORITY_FEE < 0:
+        raise ValueError("FIXED_PRIORITY_FEE must be a non-negative integer")
+    if not isinstance(EXTRA_PRIORITY_FEE, float) or EXTRA_PRIORITY_FEE < 0:
+        raise ValueError("EXTRA_PRIORITY_FEE must be a non-negative float")
+    if not isinstance(HARD_CAP_PRIOR_FEE, int) or HARD_CAP_PRIOR_FEE < 0:
+        raise ValueError("HARD_CAP_PRIOR_FEE must be a non-negative integer")
+
+
+# Validate config on import
+validate_priority_fee_config()