Added hash validation

ton-http-api/.docker/Dockerfile

@@ -1,7 +1,8 @@
 FROM ubuntu:22.04
 
 RUN DEBIAN_FRONTEND=noninteractive TZ=Etc/UTC apt-get update && apt-get -y install tzdata
-RUN apt-get update && apt-get install -y wget python3 python3-pip
+RUN apt-get update -y && apt-get install -y wget python3 python3-pip zlib1g-dev libsecp256k1-dev \
+    libmicrohttpd-dev libsodium-dev liblz4-dev libjemalloc-dev &&  rm -rf /var/lib/{apt,dpkg,cache,log}/
 
 # python requirements
 ADD ./requirements.txt /tmp/requirements.txt

ton-http-api/pyTON/main.py

@@ -182,6 +182,20 @@ def prepare_address(address):
     except:
         raise HTTPException(status_code=416, detail="Incorrect address")
 
+def prepare_hash(value):
+    if value is None:
+        return None
+    if len(value) == 44:
+        value = value.replace('_', '/').replace('-', '+')
+        data = codecs.decode(codecs.encode(value, 'utf-8'), 'base64')
+        b64 = codecs.encode(data, 'base64').decode('utf-8')
+        return b64.strip()
+    if len(value) == 64:
+        data = codecs.decode(codecs.encode(value, 'utf-8'), 'hex')
+        b64 = codecs.encode(data, 'base64').decode('utf-8')
+        return b64.strip()
+    raise ValueError('Invalid hash')
+
 def address_state(account_info):
     if isinstance(account_info.get("code", ""), int) or len(account_info.get("code", "")) == 0:
         if len(account_info.get("frozen_hash", "")) == 0:
@@ -453,6 +467,9 @@ async def get_block_transactions(
     """
     Get transactions of the given block.
     """
+    root_hash = prepare_hash(root_hash)
+    file_hash = prepare_hash(file_hash)
+    after_hash = prepare_hash(after_hash)
     return await tonlib.getBlockTransactions(workchain, shard, seqno, count, root_hash, file_hash, after_lt, after_hash)
 
 @app.get('/getBlockTransactionsExt', response_model=TonResponse, response_model_exclude_none=True, tags=['blocks','transactions'])
@@ -471,6 +488,9 @@ async def get_block_transactions_ext(
     """
     Get transactions of the given block.
     """
+    root_hash = prepare_hash(root_hash)
+    file_hash = prepare_hash(file_hash)
+    after_hash = prepare_hash(after_hash)
     return await tonlib.getBlockTransactionsExt(workchain, shard, seqno, count, root_hash, file_hash, after_lt, after_hash)
 
 @app.get('/getBlockHeader', response_model=TonResponse, response_model_exclude_none=True, tags=['blocks'])
@@ -486,6 +506,8 @@ async def get_block_header(
     """
     Get metadata of a given block.
     """
+    root_hash = prepare_hash(root_hash)
+    file_hash = prepare_hash(file_hash)
     return await tonlib.getBlockHeader(workchain, shard, seqno, root_hash, file_hash)
 
 @app.get('/getConfigParam', response_model=TonResponse, response_model_exclude_none=True, tags=['get config'])