Load Snapshot from RPC request

testing/evm.py

@@ -1,7 +1,11 @@
 import os
+
 from web3 import Web3
 
-native_aliases = ["0x0000000000000000000000000000000000000000","0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"]
+native_aliases = [
+    "0x0000000000000000000000000000000000000000",
+    "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
+]
 
 erc20_abi = [
     {
@@ -13,6 +17,7 @@ erc20_abi = [
     }
 ]
 
+
 def get_token_balance(token_address, wallet_address, block_number):
     rpc_url = os.getenv("RPC_URL")
 
@@ -26,11 +31,31 @@ def get_token_balance(token_address, wallet_address, block_number):
 
     # Check if the token_address is a native token alias
     if token_address.lower() in native_aliases:
-        balance = web3.eth.get_balance(Web3.toChecksumAddress(wallet_address), block_identifier=block_number)
+        balance = web3.eth.get_balance(
-    else:
+            Web3.toChecksumAddress(wallet_address), block_identifier=block_number
-        contract = web3.eth.contract(address=Web3.toChecksumAddress(token_address), abi=erc20_abi)
-        balance = contract.functions.balanceOf(Web3.toChecksumAddress(wallet_address)).call(
-            block_identifier=block_number
         )
+    else:
+        contract = web3.eth.contract(
+            address=Web3.toChecksumAddress(token_address), abi=erc20_abi
+        )
+        balance = contract.functions.balanceOf(
+            Web3.toChecksumAddress(wallet_address)
+        ).call(block_identifier=block_number)
 
     return balance
+
+
+def get_block_header(block_number):
+    rpc_url = os.getenv("RPC_URL")
+
+    if rpc_url is None:
+        raise EnvironmentError("RPC_URL environment variable not set")
+
+    web3 = Web3(Web3.HTTPProvider(rpc_url))
+
+    if not web3.isConnected():
+        raise ConnectionError("Failed to connect to the Ethereum node")
+
+    block = web3.eth.get_block(block_number)
+
+    return block

testing/runner.py

@@ -1,12 +1,23 @@
+import itertools
+import itertools
 import os
-from pathlib import Path
 import shutil
 import subprocess
+from collections import defaultdict
+from datetime import datetime
+from decimal import Decimal
+from pathlib import Path
 
 import yaml
+from pydantic import BaseModel
 
-from evm import get_token_balance
+from evm import get_token_balance, get_block_header
 from tycho import TychoRunner
+from tycho_client.tycho.decoders import ThirdPartyPoolTychoDecoder
+from tycho_client.tycho.models import Blockchain, EVMBlock
+from tycho_client.tycho.tycho_adapter import (
+    TychoPoolStateStreamAdapter,
+)
 
 
 class TestResult:
@@ -29,12 +40,20 @@ def load_config(yaml_path: str) -> dict:
         return yaml.safe_load(file)
 
 
+class SimulationFailure(BaseModel):
+    pool_id: str
+    sell_token: str
+    buy_token: str
+    error: str
+
+
 class TestRunner:
     def __init__(self, config_path: str, with_binary_logs: bool, db_url: str):
         self.config = load_config(config_path)
         self.base_dir = os.path.dirname(config_path)
         self.tycho_runner = TychoRunner(with_binary_logs)
         self.db_url = db_url
+        self._chain = Blockchain.ethereum
 
     def run_tests(self) -> None:
         """Run all tests specified in the configuration."""
@@ -58,12 +77,11 @@ class TestRunner:
 
             if result.success:
                 print(f"✅ {test['name']} passed.")
+
             else:
                 print(f"❗️ {test['name']} failed: {result.message}")
 
-            self.tycho_runner.empty_database(
+            self.tycho_runner.empty_database(self.db_url)
-                self.db_url
-            )
 
     def validate_state(self, expected_state: dict, stop_block: int) -> TestResult:
         """Validate the current protocol state against the expected state."""
@@ -90,7 +108,7 @@ class TestRunner:
                         )
                     if isinstance(value, list):
                         if set(map(str.lower, value)) != set(
-                                map(str.lower, component[key])
+                            map(str.lower, component[key])
                         ):
                             return TestResult.Failed(
                                 f"List mismatch for key '{key}': {value} != {component[key]}"
@@ -100,25 +118,116 @@ class TestRunner:
                             f"Value mismatch for key '{key}': {value} != {component[key]}"
                         )
 
+            token_balances: dict[str, dict[str, int]] = defaultdict(dict)
             for component in protocol_components["protocol_components"]:
                 comp_id = component["id"].lower()
                 for token in component["tokens"]:
                     token_lower = token.lower()
-                    state = next((s for s in protocol_states["states"] if s["component_id"].lower() == comp_id), None)
+                    state = next(
+                        (
+                            s
+                            for s in protocol_states["states"]
+                            if s["component_id"].lower() == comp_id
+                        ),
+                        None,
+                    )
                     if state:
                         balance_hex = state["balances"].get(token_lower, "0x0")
                     else:
                         balance_hex = "0x0"
+                    tycho_balance = int(balance_hex, 16)
+                    token_balances[comp_id][token_lower] = tycho_balance
 
                     node_balance = get_token_balance(token, comp_id, stop_block)
-                    tycho_balance = int(balance_hex, 16)
                     if node_balance != tycho_balance:
                         return TestResult.Failed(
-                            f"Balance mismatch for {comp_id}:{token} at block {stop_block}: got {node_balance} from rpc call and {tycho_balance} from Substreams")
+                            f"Balance mismatch for {comp_id}:{token} at block {stop_block}: got {node_balance} from rpc call and {tycho_balance} from Substreams"
+                        )
+            contract_states = self.tycho_runner.get_contract_state()
+            self.simulate_get_amount_out(
+                token_balances,
+                stop_block,
+                protocol_states,
+                protocol_components,
+                contract_states,
+            )
+
             return TestResult.Passed()
         except Exception as e:
             return TestResult.Failed(str(e))
 
+    def simulate_get_amount_out(
+        self,
+        token_balances: dict[str, dict[str, int]],
+        block_number: int,
+        protocol_states: dict,
+        protocol_components: dict,
+        contract_state: dict,
+    ) -> TestResult:
+        protocol_type_names = self.config["protocol_type_names"]
+
+        block_header = get_block_header(block_number)
+        block: EVMBlock = EVMBlock(
+            id=block_number,
+            ts=datetime.fromtimestamp(block_header.timestamp),
+            hash_=block_header.hash.hex(),
+        )
+
+        failed_simulations = dict[str, list[SimulationFailure]]
+        for protocol in protocol_type_names:
+            # TODO: Parametrize this
+            decoder = ThirdPartyPoolTychoDecoder(
+                "CurveSwapAdapter.evm.runtime", 0, False
+            )
+            stream_adapter = TychoPoolStateStreamAdapter(
+                tycho_url="0.0.0.0:4242",
+                protocol=protocol,
+                decoder=decoder,
+                blockchain=self._chain,
+            )
+            snapshot_message = stream_adapter.build_snapshot_message(
+                protocol_components, protocol_states, contract_state
+            )
+            decoded = stream_adapter.process_snapshot(block, snapshot_message)
+
+            for pool_state in decoded.pool_states.values():
+                pool_id = pool_state.id_
+                protocol_balances = token_balances.get(pool_id)
+                if not protocol_balances:
+                    raise ValueError(f"Missing balances for pool {pool_id}")
+                for sell_token, buy_token in itertools.permutations(
+                    pool_state.tokens, 2
+                ):
+                    try:
+                        # Try to sell 0.1% of the protocol balance
+                        sell_amount = Decimal("0.001") * sell_token.from_onchain_amount(
+                            protocol_balances[sell_token.address]
+                        )
+                        amount_out, gas_used, _ = pool_state.get_amount_out(
+                            sell_token, sell_amount, buy_token
+                        )
+                        # TODO: Should we validate this with an archive node or RPC reader?
+                        print(
+                            f"Amount out for {pool_id}: {sell_amount} {sell_token} -> {amount_out} {buy_token} - "
+                            f"Gas used: {gas_used}"
+                        )
+                    except Exception as e:
+                        print(
+                            f"Error simulating get_amount_out for {pool_id}: {sell_token} -> {buy_token}. "
+                            f"Error: {e}"
+                        )
+                        if pool_id not in failed_simulations:
+                            failed_simulations[pool_id] = []
+                        failed_simulations[pool_id].append(
+                            SimulationFailure(
+                                pool_id=pool_id,
+                                sell_token=sell_token,
+                                buy_token=buy_token,
+                                error=str(e),
+                            )
+                        )
+                        continue
+
     @staticmethod
     def build_spkg(yaml_file_path: str, modify_func: callable) -> str:
         """Build a Substreams package with modifications to the YAML file."""

testing/tycho.py

@@ -1,14 +1,14 @@
+import os
 import signal
+import subprocess
 import threading
 import time
-import requests
-import subprocess
-import os
-import psycopg2
-from psycopg2 import sql
-
 from pathlib import Path
 
+import psycopg2
+import requests
+from psycopg2 import sql
+
 binary_path = Path(__file__).parent / "tycho-indexer"
 
 
@@ -148,6 +148,16 @@ class TychoRunner:
         response = requests.post(url, headers=headers, json=data)
         return response.json()
 
+    @staticmethod
+    def get_contract_state() -> dict:
+        """Retrieve contract state from the RPC server."""
+        url = "http://0.0.0.0:4242/v1/ethereum/contract_state"
+        headers = {"accept": "application/json", "Content-Type": "application/json"}
+        data = {}
+
+        response = requests.post(url, headers=headers, json=data)
+        return response.json()
+
     @staticmethod
     def empty_database(db_url: str) -> None:
         """Drop and recreate the Tycho indexer database."""

tycho_client/tycho/assets/ISwapAdapter.abi

@@ -0,0 +1,250 @@
+[
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "limit",
+          "type": "uint256"
+        }
+      ],
+      "name": "LimitExceeded",
+      "type": "error"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "reason",
+          "type": "string"
+        }
+      ],
+      "name": "NotImplemented",
+      "type": "error"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "string",
+          "name": "reason",
+          "type": "string"
+        }
+      ],
+      "name": "Unavailable",
+      "type": "error"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "bytes32",
+          "name": "poolId",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "sellToken",
+          "type": "address"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "buyToken",
+          "type": "address"
+        }
+      ],
+      "name": "getCapabilities",
+      "outputs": [
+        {
+          "internalType": "enum ISwapAdapterTypes.Capability[]",
+          "name": "capabilities",
+          "type": "uint8[]"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "bytes32",
+          "name": "poolId",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "sellToken",
+          "type": "address"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "buyToken",
+          "type": "address"
+        }
+      ],
+      "name": "getLimits",
+      "outputs": [
+        {
+          "internalType": "uint256[]",
+          "name": "limits",
+          "type": "uint256[]"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "uint256",
+          "name": "offset",
+          "type": "uint256"
+        },
+        {
+          "internalType": "uint256",
+          "name": "limit",
+          "type": "uint256"
+        }
+      ],
+      "name": "getPoolIds",
+      "outputs": [
+        {
+          "internalType": "bytes32[]",
+          "name": "ids",
+          "type": "bytes32[]"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "bytes32",
+          "name": "poolId",
+          "type": "bytes32"
+        }
+      ],
+      "name": "getTokens",
+      "outputs": [
+        {
+          "internalType": "contract IERC20[]",
+          "name": "tokens",
+          "type": "address[]"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "bytes32",
+          "name": "poolId",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "sellToken",
+          "type": "address"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "buyToken",
+          "type": "address"
+        },
+        {
+          "internalType": "uint256[]",
+          "name": "specifiedAmounts",
+          "type": "uint256[]"
+        }
+      ],
+      "name": "price",
+      "outputs": [
+        {
+          "components": [
+            {
+              "internalType": "uint256",
+              "name": "numerator",
+              "type": "uint256"
+            },
+            {
+              "internalType": "uint256",
+              "name": "denominator",
+              "type": "uint256"
+            }
+          ],
+          "internalType": "struct ISwapAdapterTypes.Fraction[]",
+          "name": "prices",
+          "type": "tuple[]"
+        }
+      ],
+      "stateMutability": "view",
+      "type": "function"
+    },
+    {
+      "inputs": [
+        {
+          "internalType": "bytes32",
+          "name": "poolId",
+          "type": "bytes32"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "sellToken",
+          "type": "address"
+        },
+        {
+          "internalType": "contract IERC20",
+          "name": "buyToken",
+          "type": "address"
+        },
+        {
+          "internalType": "enum ISwapAdapterTypes.OrderSide",
+          "name": "side",
+          "type": "uint8"
+        },
+        {
+          "internalType": "uint256",
+          "name": "specifiedAmount",
+          "type": "uint256"
+        }
+      ],
+      "name": "swap",
+      "outputs": [
+        {
+          "components": [
+            {
+              "internalType": "uint256",
+              "name": "calculatedAmount",
+              "type": "uint256"
+            },
+            {
+              "internalType": "uint256",
+              "name": "gasUsed",
+              "type": "uint256"
+            },
+            {
+              "components": [
+                {
+                  "internalType": "uint256",
+                  "name": "numerator",
+                  "type": "uint256"
+                },
+                {
+                  "internalType": "uint256",
+                  "name": "denominator",
+                  "type": "uint256"
+                }
+              ],
+              "internalType": "struct ISwapAdapterTypes.Fraction",
+              "name": "price",
+              "type": "tuple"
+            }
+          ],
+          "internalType": "struct ISwapAdapterTypes.Trade",
+          "name": "trade",
+          "type": "tuple"
+        }
+      ],
+      "stateMutability": "nonpayable",
+      "type": "function"
+    }
+  ]

tycho_client/tycho/decoders.py

@@ -62,7 +62,7 @@ class ThirdPartyPoolTychoDecoder:
             adapter_contract_name=self.adapter_contract,
             minimum_gas=self.minimum_gas,
             hard_sell_limit=self.hard_limit,
-            trace=True,
+            trace=False,
             **optional_attributes,
         )
 

tycho_client/tycho/models.py

@@ -5,7 +5,7 @@ from fractions import Fraction
 from logging import getLogger
 from typing import Union
 
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, PrivateAttr
 
 Address = str
 
@@ -30,6 +30,7 @@ class EthereumToken(BaseModel):
     address: str
     decimals: int
     gas: Union[int, list[int]] = 29000
+    _hash: int = PrivateAttr(default=None)
 
     def to_onchain_amount(self, amount: Union[float, Decimal, str]) -> int:
         """Converts floating-point numerals to an integer, by shifting right by the
@@ -62,7 +63,7 @@ class EthereumToken(BaseModel):
 
         Quantize is needed for UniswapV2.
         """
-        with localcontext(self._dec_context):
+        with localcontext(Context(rounding=ROUND_FLOOR, prec=256)):
             if isinstance(onchain_amount, Fraction):
                 return (
                     Decimal(onchain_amount.numerator)
@@ -80,6 +81,22 @@ class EthereumToken(BaseModel):
                 amount = Decimal(str(onchain_amount)) / Decimal(10 ** self.decimals)
             return amount
 
+    def __repr__(self):
+        return self.symbol
+
+    def __str__(self):
+        return self.symbol
+
+    def __eq__(self, other) -> bool:
+        # this is faster than calling custom __hash__, due to cache check
+        return other.address == self.address
+
+    def __hash__(self) -> int:
+        if self._hash is None:
+            # caching the hash saves time during graph search
+            self._hash = hash(self.address)
+        return self._hash
+
 
 class DatabaseType(Enum):
     # Make call to the node each time it needs a storage (unless cached from a previous call).

tycho_client/tycho/pool_state.py

@@ -5,7 +5,7 @@ from copy import deepcopy
 from decimal import Decimal
 from fractions import Fraction
 from logging import getLogger
-from typing import Optional, cast, TypeVar, Annotated, DefaultDict
+from typing import Optional, cast, TypeVar, Annotated
 
 from eth_typing import HexStr
 from protosim_py import SimulationEngine, AccountInfo
@@ -54,10 +54,10 @@ class ThirdPartyPool(BaseModel):
     """The contract address for where protocol balances are stored (i.e. a vault contract).
     If given, balances will be overwritten here instead of on the pool contract during simulations."""
 
-    block_lasting_overwrites: DefaultDict[
+    block_lasting_overwrites: defaultdict[
         Address,
         Annotated[dict[int, int], Field(default_factory=lambda: defaultdict[dict])],
-    ]
+    ] = Field(default_factory=lambda: defaultdict(dict))
 
     """Storage overwrites that will be applied to all simulations. They will be cleared
     when ``clear_all_cache`` is called, i.e. usually at each block. Hence the name."""
@@ -97,6 +97,18 @@ class ThirdPartyPool(BaseModel):
             return
         else:
             engine = create_engine([t.address for t in self.tokens], trace=self.trace)
+            engine.init_account(
+                address="0x0000000000000000000000000000000000000000",
+                account=AccountInfo(balance=0, nonce=0),
+                mocked=False,
+                permanent_storage=None,
+            )
+            engine.init_account(
+                address="0x0000000000000000000000000000000000000004",
+                account=AccountInfo(balance=0, nonce=0),
+                mocked=False,
+                permanent_storage=None,
+            )
             engine.init_account(
                 address=ADAPTER_ADDRESS,
                 account=AccountInfo(
@@ -116,6 +128,7 @@ class ThirdPartyPool(BaseModel):
                 )
         self._engine = engine
 
+    def _set_spot_prices(self):
         """Set the spot prices for this pool.
 
         We currently require the price function capability for now.

tycho_client/tycho/tycho_adapter.py

@@ -3,7 +3,6 @@ import json
 import platform
 import time
 from asyncio.subprocess import STDOUT, PIPE
-from collections import defaultdict
 from dataclasses import dataclass
 from datetime import datetime
 from decimal import Decimal
@@ -14,11 +13,11 @@ from typing import Any, Optional, Dict
 import requests
 from protosim_py import AccountUpdate, AccountInfo, BlockHeader
 
-from .pool_state import ThirdPartyPool
 from .constants import TYCHO_CLIENT_LOG_FOLDER, TYCHO_CLIENT_FOLDER
 from .decoders import ThirdPartyPoolTychoDecoder
 from .exceptions import APIRequestError, TychoClientException
 from .models import Blockchain, EVMBlock, EthereumToken, SynchronizerState, Address
+from .pool_state import ThirdPartyPool
 from .tycho_db import TychoDBSingleton
 from .utils import create_engine
 
@@ -117,7 +116,6 @@ class BlockProtocolChanges:
     pool_states: dict[Address, ThirdPartyPool]
     """All updated pools"""
     removed_pools: set[Address]
-    sync_states: dict[str, SynchronizerState]
     deserialization_time: float
     """The time it took to deserialize the pool states from the tycho feed message"""
 
@@ -153,7 +151,7 @@ class TychoPoolStateStreamAdapter:
         # Create engine
         # TODO: This should be initialized outside the adapter?
         TychoDBSingleton.initialize(tycho_http_url=self.tycho_url)
-        self._engine = create_engine([], trace=True)
+        self._engine = create_engine([], trace=False)
 
         # Loads tokens from Tycho
         self._tokens: dict[str, EthereumToken] = TokenLoader(
@@ -162,10 +160,6 @@ class TychoPoolStateStreamAdapter:
             min_token_quality=self.min_token_quality,
         ).get_tokens()
 
-        # TODO: Check if it's necessary
-        self.ignored_pools = []
-        self.vm_contracts = defaultdict(list)
-
     async def start(self):
         """Start the tycho-client Rust binary through subprocess"""
         # stdout=PIPE means that the output is piped directly to this Python process
@@ -240,23 +234,31 @@ class TychoPoolStateStreamAdapter:
                 error_msg += f" Tycho logs: {last_lines}"
             log.exception(error_msg)
             raise Exception("Tycho-client failed.")
-        return self._process_message(msg)
+        return self.process_tycho_message(msg)
 
-    def _process_message(self, msg) -> BlockProtocolChanges:
+    @staticmethod
-        try:
+    def build_snapshot_message(
-            sync_state = msg["sync_states"][self.protocol]
+        protocol_components: dict, protocol_states: dict, contract_states: dict
-            state_msg = msg["state_msgs"][self.protocol]
+    ) -> dict[str, ThirdPartyPool]:
-            log.info(f"Received sync state for {self.protocol}: {sync_state}")
+        vm_states = {state["address"]: state for state in contract_states["accounts"]}
-            if not sync_state["status"] != SynchronizerState.ready.value:
+        states = {}
-                raise ValueError("Tycho-indexer is not synced")
+        for component in protocol_components["protocol_components"]:
-        except KeyError:
+            pool_id = component["id"]
-            raise ValueError("Invalid message received from tycho-client.")
+            states[pool_id] = {"component": component}
+        for state in protocol_states["states"]:
+            pool_id = state["component_id"]
+            if pool_id not in states:
+                log.warning(f"State for pool {pool_id} not found in components")
+                continue
+            states[pool_id]["state"] = state
+        snapshot = {"vm_storage": vm_states, "states": states}
 
-        start = time.monotonic()
+        return snapshot
 
-        removed_pools = set()
+    def process_tycho_message(self, msg) -> BlockProtocolChanges:
-        decoded_count = 0
+        self._validate_sync_states(msg)
-        failed_count = 0
+
+        state_msg = msg["state_msgs"][self.protocol]
 
         block = EVMBlock(
             id=msg["block"]["id"],
@@ -264,24 +266,30 @@ class TychoPoolStateStreamAdapter:
             hash_=msg["block"]["hash"],
         )
 
-        self._process_vm_storage(state_msg["snapshots"]["vm_storage"], block)
+        return self.process_snapshot(block, state_msg["snapshot"])
 
-        # decode new pools
+    def process_snapshot(
+        self, block: EVMBlock, state_msg: dict
+    ) -> BlockProtocolChanges:
+        start = time.monotonic()
+        removed_pools = set()
+        decoded_count = 0
+        failed_count = 0
+
+        self._process_vm_storage(state_msg["vm_storage"], block)
+
+        # decode new components
         decoded_pools, failed_pools = self._decoder.decode_snapshot(
-            state_msg["snapshots"]["states"], block, self._tokens
+            state_msg["states"], block, self._tokens
         )
 
         decoded_count += len(decoded_pools)
         failed_count += len(failed_pools)
 
-        for addr, p in decoded_pools.items():
-            self.vm_contracts[addr].append(p.id_)
         decoded_pools = {
             p.id_: p for p in decoded_pools.values()
         }  # remap pools to their pool ids
-
         deserialization_time = time.monotonic() - start
-
         total = decoded_count + failed_count
         log.debug(
             f"Received {total} snapshots. n_decoded: {decoded_count}, n_failed: {failed_count}"
@@ -296,6 +304,15 @@ class TychoPoolStateStreamAdapter:
             deserialization_time=round(deserialization_time, 3),
         )
 
+    def _validate_sync_states(self, msg):
+        try:
+            sync_state = msg["sync_states"][self.protocol]
+            log.info(f"Received sync state for {self.protocol}: {sync_state}")
+            if not sync_state["status"] != SynchronizerState.ready.value:
+                raise ValueError("Tycho-indexer is not synced")
+        except KeyError:
+            raise ValueError("Invalid message received from tycho-client.")
+
     def _process_vm_storage(self, storage: dict[str, Any], block: EVMBlock):
         vm_updates = []
         for storage_update in storage.values():
@@ -325,4 +342,4 @@ class TychoPoolStateStreamAdapter:
             )
 
         block_header = BlockHeader(block.id, block.hash_, int(block.ts.timestamp()))
-        self._db.update(vm_updates, block_header)
+        TychoDBSingleton.get_instance().update(vm_updates, block_header)