Add transfer classifiers to classifier specs. Implement for erc20 and weth

mev_inspect/classifiers/specs/aave.py

@@ -1,6 +1,6 @@
+from mev_inspect.schemas.classifier_specs import ClassifierSpec
 from mev_inspect.schemas.classified_traces import (
     Classification,
-    ClassifierSpec,
     Protocol,
 )
 

mev_inspect/classifiers/specs/balancer.py

@@ -1,6 +1,6 @@
+from mev_inspect.schemas.classifier_specs import ClassifierSpec
 from mev_inspect.schemas.classified_traces import (
     Classification,
-    ClassifierSpec,
     Protocol,
 )
 

mev_inspect/classifiers/specs/curve.py

@@ -1,5 +1,5 @@
+from mev_inspect.schemas.classifier_specs import ClassifierSpec
 from mev_inspect.schemas.classified_traces import (
-    ClassifierSpec,
     Protocol,
 )
 

mev_inspect/classifiers/specs/erc20.py

@@ -1,15 +1,34 @@
+from typing import Optional
+
+from mev_inspect.schemas.classifier_specs import ClassifierSpec
 from mev_inspect.schemas.classified_traces import (
     Classification,
-    ClassifierSpec,
+    DecodedCallTrace,
 )
+from mev_inspect.schemas.transfers import ERC20Transfer
+
+
+def classify_transfer(trace: DecodedCallTrace) -> Optional[ERC20Transfer]:
+    return ERC20Transfer(
+        block_number=trace.block_number,
+        transaction_hash=trace.transaction_hash,
+        trace_address=trace.trace_address,
+        amount=trace.inputs["amount"],
+        to_address=trace.inputs["recipient"],
+        from_address=trace.inputs.get("sender", trace.from_address),
+        token_address=trace.to_address,
+    )
 
 
 ERC20_SPEC = ClassifierSpec(
     abi_name="ERC20",
+    transfer_classifiers={
+        "transferFrom(address,address,uint256)": classify_transfer,
+        "transfer(address,uint256)": classify_transfer,
+    },
     classifications={
         "transferFrom(address,address,uint256)": Classification.transfer,
         "transfer(address,uint256)": Classification.transfer,
-        "burn(address)": Classification.burn,
     },
 )
 

mev_inspect/classifiers/specs/uniswap.py

@@ -1,6 +1,6 @@
+from mev_inspect.schemas.classifier_specs import ClassifierSpec
 from mev_inspect.schemas.classified_traces import (
     Classification,
-    ClassifierSpec,
     Protocol,
 )
 

mev_inspect/classifiers/specs/weth.py

@@ -1,17 +1,39 @@
+from typing import Optional
+
+from mev_inspect.schemas.classifier_specs import ClassifierSpec
 from mev_inspect.schemas.classified_traces import (
     Classification,
-    ClassifierSpec,
+    DecodedCallTrace,
     Protocol,
 )
+from mev_inspect.schemas.transfers import ERC20Transfer
+
+
+def classify_transfer(trace: DecodedCallTrace) -> Optional[ERC20Transfer]:
+    return ERC20Transfer(
+        block_number=trace.block_number,
+        transaction_hash=trace.transaction_hash,
+        trace_address=trace.trace_address,
+        amount=trace.inputs["wad"],
+        to_address=trace.inputs["dst"],
+        from_address=trace.from_address,
+        token_address=trace.to_address,
+    )
+
 
 WETH_SPEC = ClassifierSpec(
     abi_name="WETH9",
     protocol=Protocol.weth,
     valid_contract_addresses=["0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"],
+    transfer_classifiers={
+        "transferFrom(address,address,uint256)": classify_transfer,
+        "transfer(address,uint256)": classify_transfer,
+    },
     classifications={
         "transferFrom(address,address,uint256)": Classification.transfer,
         "transfer(address,uint256)": Classification.transfer,
     },
 )
 
+
 WETH_CLASSIFIER_SPECS = [WETH_SPEC]

mev_inspect/classifiers/specs/zero_ex.py

@@ -1,7 +1,5 @@
-from mev_inspect.schemas.classified_traces import (
+from mev_inspect.schemas.classifier_specs import ClassifierSpec
-    ClassifierSpec,
+from mev_inspect.schemas.classified_traces import Protocol
-    Protocol,
-)
 
 
 ZEROX_CONTRACT_SPECS = [

mev_inspect/schemas/classified_traces.py

@@ -1,8 +1,6 @@
 from enum import Enum
 from typing import Any, Dict, List, Optional
 
-from pydantic import BaseModel
-
 from .blocks import Trace
 
 
@@ -64,10 +62,3 @@ class DecodedCallTrace(CallTrace):
     gas_used: Optional[int]
     function_name: Optional[str]
     function_signature: Optional[str]
-
-
-class ClassifierSpec(BaseModel):
-    abi_name: str
-    protocol: Optional[Protocol] = None
-    valid_contract_addresses: Optional[List[str]] = None
-    classifications: Dict[str, Classification] = {}

mev_inspect/schemas/classifier_specs.py

@@ -0,0 +1,17 @@
+from typing import Callable, Dict, List, Optional
+
+from pydantic import BaseModel
+
+from .classified_traces import Classification, DecodedCallTrace, Protocol
+from .transfers import ERC20Transfer
+
+
+TransferClassifier = Callable[[DecodedCallTrace], Optional[ERC20Transfer]]
+
+
+class ClassifierSpec(BaseModel):
+    abi_name: str
+    protocol: Optional[Protocol] = None
+    valid_contract_addresses: Optional[List[str]] = None
+    classifications: Dict[str, Classification] = {}
+    transfer_classifiers: Dict[str, TransferClassifier] = {}