metadata.json generator

src/dexorder/bin/metadata.py

@@ -0,0 +1,75 @@
+import json
+import logging
+import sys
+
+from sqlalchemy import select
+
+from dexorder import db
+from dexorder.configuration import parse_args
+from dexorder.database.model import Pool, Token
+
+log = logging.getLogger(__name__)
+
+
+token_map: dict[str,Token] = {}
+
+
+def dump(*args):
+    print(*args, end='')
+
+
+def json_dump(**kwargs):
+    dump(json.dumps(dict(**kwargs),separators=(',', ':')))
+
+def dump_tokens():
+    first = True
+    for token in db.session.scalars(select(Token)):
+        token: Token
+        token_map[token.address] = token
+        if first:
+            first = False
+        else:
+            dump(',')
+        json_dump(
+            a=token.address,
+            n=token.name,
+            s=token.symbol,
+            d=token.decimals,
+        )
+
+
+def dump_pools():
+    first = True
+    for pool in db.session.scalars(select(Pool)):
+        pool: Pool
+        if first:
+            first = False
+        else:
+            dump(',')
+        json_dump(
+            a=pool.address,
+            b=pool.base,
+            q=pool.quote,
+            f=pool.fee,
+            e=pool.exchange.value,
+            d=pool.decimals,
+        )
+
+def generate_metadata():
+    dump('{"t":[')
+    dump_tokens()
+    dump('],"p":[')
+    dump_pools()
+    dump(']}')
+
+
+def main():
+    logging.basicConfig(level=logging.INFO, stream=sys.stderr)
+    log.setLevel(logging.DEBUG)
+    parse_args()
+    db.connect(migrate=False)
+    generate_metadata()
+
+
+if __name__ == '__main__':
+    main()

src/dexorder/configuration/schema.py

@@ -26,3 +26,4 @@ class Config:
     deployments: Optional[dict[str,str]] = field(default_factory=dict)
     min_gas: str = '0'
 
+    tokens_dir: str = '.'

src/dexorder/database/model/token.py

@@ -14,6 +14,7 @@ class TokenDict (TypedDict):
     type: str
     chain: int
     address: str
+    name: str
     symbol: str
     decimals: int
 
@@ -25,6 +26,7 @@ class Token (Base):
 
     chain: Mapped[Blockchain] = mapped_column(primary_key=True)
     address: Mapped[Address] = mapped_column(primary_key=True)
+    name: Mapped[str]
     symbol: Mapped[str]
     decimals: Mapped[Uint8]
 
@@ -32,10 +34,10 @@ class Token (Base):
     @staticmethod
     def load(token_dict: TokenDict) -> 'Token':
         return Token(chain=Blockchain.get(token_dict['chain']), address=token_dict['address'],
-                     symbol=token_dict['symbol'], decimals=token_dict['decimals'])
+                     name=token_dict['name'], symbol=token_dict['symbol'], decimals=token_dict['decimals'])
 
 
     def dump(self):
         return TokenDict(type='Token', chain=self.chain.chain_id, address=self.address,
-                         symbol=self.symbol, decimals=self.decimals)
+                         name=self.name, symbol=self.symbol, decimals=self.decimals)
 

src/dexorder/tokens.py

@@ -1,3 +1,4 @@
+import asyncio
 import logging
 
 from eth_abi.exceptions import InsufficientDataBytes
@@ -11,7 +12,7 @@ from dexorder.database.model.token import TokenDict
 log = logging.getLogger(__name__)
 
 
-async def get_token(address):
+async def get_token(address) -> TokenDict:
     try:
         return address_metadata[address]
     except KeyError:
@@ -21,13 +22,13 @@ async def get_token(address):
 
 async def load_token(address: str) -> TokenDict:
     contract = ERC20(address)
-    symbolProm = contract.symbol()
+    prom = asyncio.gather(contract.name(), contract.symbol())
     try:
         decimals = await contract.decimals()
     except (InsufficientDataBytes, ContractLogicError, BadFunctionCallOutput):
         log.warning(f'token {address} has no decimals()')
         decimals = 0
-    symbol = await symbolProm
-    log.debug(f'new token {symbol} {address}')
+    name, symbol = await prom
+    log.debug(f'new token {name} {symbol} {address}')
     return TokenDict(type='Token', chain=current_chain.get().chain_id, address=address,
-                     symbol=symbol, decimals=decimals)
+                     name=name, symbol=symbol, decimals=decimals)