initial commit

translation_api/dsk/pow.py

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+"""
+DeepSeek Proof of Work Challenge Implementation
+Author: @xtekky
+Date: 2024
+
+This module implements a proof-of-work challenge solver using WebAssembly (WASM)
+for Custom sha3 hashing. It provides functionality to solve computational challenges
+required for authentication or rate limiting purposes.
+"""
+
+import json
+import base64
+import wasmtime
+import numpy as np
+from typing import Dict, Any
+import os
+
+WASM_PATH = f'{os.path.dirname(__file__)}/wasm/sha3_wasm_bg.7b9ca65ddd.wasm'
+
+class DeepSeekHash:
+    def __init__(self):
+        self.instance = None
+        self.memory   = None
+        self.store    = None
+        
+    def init(self, wasm_path: str):
+        engine = wasmtime.Engine()
+        
+        with open(wasm_path, 'rb') as f:
+            wasm_bytes = f.read()
+            
+        module = wasmtime.Module(engine, wasm_bytes)
+        
+        self.store = wasmtime.Store(engine)
+        linker     = wasmtime.Linker(engine)
+        linker.define_wasi()
+        
+        self.instance = linker.instantiate(self.store, module)
+        self.memory   = self.instance.exports(self.store)["memory"]
+        
+        return self
+    
+    def _write_to_memory(self, text: str) -> tuple[int, int]:
+        encoded = text.encode('utf-8')
+        length  = len(encoded)
+        ptr     = self.instance.exports(self.store)["__wbindgen_export_0"](self.store, length, 1)
+        
+        memory_view = self.memory.data_ptr(self.store)
+        for i, byte in enumerate(encoded):
+            memory_view[ptr + i] = byte
+            
+        return ptr, length
+    
+    def calculate_hash(self, algorithm: str, challenge: str, salt: str, 
+                      difficulty: int, expire_at: int) -> float:
+        
+        prefix = f"{salt}_{expire_at}_"  
+        retptr = self.instance.exports(self.store)["__wbindgen_add_to_stack_pointer"](self.store, -16)
+        
+        try:
+            challenge_ptr, challenge_len = self._write_to_memory(challenge)
+            prefix_ptr, prefix_len       = self._write_to_memory(prefix)
+            
+            self.instance.exports(self.store)["wasm_solve"](
+                self.store,
+                retptr, 
+                challenge_ptr, 
+                challenge_len, 
+                prefix_ptr, 
+                prefix_len, 
+                float(difficulty)
+            )
+            
+            memory_view = self.memory.data_ptr(self.store)
+            status      = int.from_bytes(bytes(memory_view[retptr:retptr + 4]), byteorder='little', signed=True)
+            
+            if status == 0:
+                return None
+            
+            value_bytes = bytes(memory_view[retptr + 8:retptr + 16])
+            value       = np.frombuffer(value_bytes, dtype=np.float64)[0]
+            
+            return int(value)
+            
+        finally:
+            self.instance.exports(self.store)["__wbindgen_add_to_stack_pointer"](self.store, 16)
+
+class DeepSeekPOW:
+    def __init__(self):
+        self.hasher = DeepSeekHash().init(WASM_PATH)
+    
+    def solve_challenge(self, config: Dict[str, Any]) -> str:
+        """Solves a proof-of-work challenge and returns the encoded response"""
+        answer = self.hasher.calculate_hash(
+            config['algorithm'],
+            config['challenge'],
+            config['salt'],
+            config['difficulty'],
+            config['expire_at']
+        )
+        
+        result = {
+            'algorithm': config['algorithm'],
+            'challenge': config['challenge'],
+            'salt': config['salt'],
+            'answer': answer,
+            'signature': config['signature'],
+            'target_path': config['target_path']
+        }
+        
+        return base64.b64encode(json.dumps(result).encode()).decode()