diff --git a/.github/workflows/type.yml b/.github/workflows/type.yml
new file mode 100644
index 000000000..cf637e25c
--- /dev/null
+++ b/.github/workflows/type.yml
@@ -0,0 +1,33 @@
+name: Type check
+
+# Controls when the action will run. Triggers the workflow on push or pull request
+# events but only for the main and develop branches.
+on:
+  push:
+    branches: [ main, develop ]
+  pull_request:
+    branches: [ main, develop ]
+
+jobs:
+  mypy:
+    name: Run mypy
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Set up latest Python
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+          cache: 'pip'
+
+      - name: Install dependencies
+        run: |
+          pip install --upgrade pip
+          pip install -r requirements.txt
+
+      - name: mypy
+        run: |
+          make type
+
diff --git a/Makefile b/Makefile
index 3440d1f78..ed22ea332 100644
--- a/Makefile
+++ b/Makefile
@@ -121,6 +121,14 @@ pylint:
 	@echo ""
 	@echo "pylint passed ⚙️"
 
+.PHONY: type
+type:
+	@echo "$(REVERSE)Running$(RESET) $(BOLD)mypy$(RESET)..."
+	@mypy --version
+	@mypy curvesim
+	@echo ""
+	@echo "Type checks passed 🏆"
+
 .PHONY: coverage
 coverage:
 	pytest --cov -n auto --cov-report=
diff --git a/changelog.d/20230919_093613_chanhosuh_use_mypy.rst b/changelog.d/20230919_093613_chanhosuh_use_mypy.rst
new file mode 100644
index 000000000..b569565c6
--- /dev/null
+++ b/changelog.d/20230919_093613_chanhosuh_use_mypy.rst
@@ -0,0 +1,7 @@
+Added
+-----
+
+- Add type checks via mypy to the CI (#252).
+- `StateLog` is derived from a `Log` interface class in-line
+  with other "template" classes.  This also helps avoid
+  circular dependencies.
diff --git a/curvesim/_order_book/__init__.py b/curvesim/_order_book/__init__.py
index 9dd1cd564..45383c886 100644
--- a/curvesim/_order_book/__init__.py
+++ b/curvesim/_order_book/__init__.py
@@ -9,6 +9,7 @@
 from curvesim.pool import CurveMetaPool
 
 
+# pylint: disable=too-many-locals
 def order_book(pool, i, j, *, width=0.1, resolution=10**23, use_fee=True, show=True):
     """
     Computes and optionally plots an orderbook representation of exchange rates
diff --git a/curvesim/iterators/price_samplers/price_volume.py b/curvesim/iterators/price_samplers/price_volume.py
index c3912d576..add02223c 100644
--- a/curvesim/iterators/price_samplers/price_volume.py
+++ b/curvesim/iterators/price_samplers/price_volume.py
@@ -1,3 +1,5 @@
+from typing import Iterator
+
 from curvesim.logging import get_logger
 from curvesim.price_data import get
 from curvesim.templates.price_samplers import PriceSample, PriceSampler
@@ -68,7 +70,7 @@ def __init__(
         self.volumes = volumes.set_axis(assets.symbol_pairs, axis="columns")
 
     @override
-    def __iter__(self) -> PriceVolumeSample:
+    def __iter__(self) -> Iterator[PriceVolumeSample]:
         """
         Yields
         -------
@@ -86,7 +88,7 @@ def __iter__(self) -> PriceVolumeSample:
             prices = prices.to_dict()
             volumes = volumes.to_dict()
 
-            yield PriceVolumeSample(price_timestamp, prices, volumes)
+            yield PriceVolumeSample(price_timestamp, prices, volumes)  # type:ignore
 
     def total_volumes(self):
         """
diff --git a/curvesim/logging.py b/curvesim/logging.py
index 4808c0df0..986fe2826 100644
--- a/curvesim/logging.py
+++ b/curvesim/logging.py
@@ -9,6 +9,7 @@
 import os
 from contextlib import contextmanager
 from logging.handlers import QueueHandler, QueueListener
+from typing import Dict, List
 
 # -- convenient parameters to adjust for debugging -- #
 DEFAULT_LEVEL = "info"
@@ -41,7 +42,7 @@
 # FIXME: need a function to update the config after module initialization
 HANDLERS = ["console", "file"] if USE_LOG_FILE else ["console"]
 
-CUSTOM_LOGGING_CONFIG = {
+CUSTOM_LOGGING_CONFIG: dict = {
     "version": 1,
     "disable_existing_loggers": False,
     "formatters": {
@@ -74,8 +75,8 @@
 }
 
 # 3rd party loggers that we want to largely ignore
-silenced_loggers = ["matplotlib", "asyncio", "rlp", "parso", "web3"]
-configured_loggers = CUSTOM_LOGGING_CONFIG["loggers"]
+silenced_loggers: List[str] = ["matplotlib", "asyncio", "rlp", "parso", "web3"]
+configured_loggers: Dict[str, dict] = CUSTOM_LOGGING_CONFIG["loggers"]
 for name in silenced_loggers:
     configured_loggers[name] = {
         "handlers": HANDLERS,
diff --git a/curvesim/metrics/state_log/log.py b/curvesim/metrics/state_log/log.py
index f816846ca..614f89712 100644
--- a/curvesim/metrics/state_log/log.py
+++ b/curvesim/metrics/state_log/log.py
@@ -5,12 +5,14 @@
 from pandas import DataFrame, concat
 
 from curvesim.metrics.base import PoolMetric
+from curvesim.templates import Log
+from curvesim.utils import override
 
 from .pool_parameters import get_pool_parameters
 from .pool_state import get_pool_state
 
 
-class StateLog:
+class StateLog(Log):
     """
     Logger that records simulation/pool state throughout each simulation run and
     computes metrics at the end of each run.
@@ -29,6 +31,7 @@ def __init__(self, pool, metrics):
         self.state_per_run = get_pool_parameters(pool)
         self.state_per_trade = []
 
+    @override
     def update(self, **kwargs):
         """Records pool state and any keyword arguments provided."""
 
@@ -47,6 +50,7 @@ def get_logs(self):
             **state_per_trade,
         }
 
+    @override
     def compute_metrics(self):
         """Computes metrics from the accumulated log data."""
 
diff --git a/curvesim/pipelines/simple/strategy.py b/curvesim/pipelines/simple/strategy.py
index c75138774..35aca1069 100644
--- a/curvesim/pipelines/simple/strategy.py
+++ b/curvesim/pipelines/simple/strategy.py
@@ -1,6 +1,8 @@
+from typing import Type
+
 from curvesim.logging import get_logger
 from curvesim.metrics.state_log import StateLog
-from curvesim.templates import Strategy
+from curvesim.templates import Log, Strategy, Trader
 
 from .trader import SimpleArbitrageur
 
@@ -17,8 +19,8 @@ class SimpleStrategy(Strategy):  # pylint: disable=too-few-public-methods
         Class for creating state logger instances.
     """
 
-    trader_class = SimpleArbitrageur
-    state_log_class = StateLog
+    trader_class: Type[Trader] = SimpleArbitrageur
+    log_class: Type[Log] = StateLog
 
     def _get_trader_inputs(self, sample):
         return (sample.prices,)
diff --git a/curvesim/pipelines/vol_limited_arb/strategy.py b/curvesim/pipelines/vol_limited_arb/strategy.py
index e8c127615..697c3d23b 100644
--- a/curvesim/pipelines/vol_limited_arb/strategy.py
+++ b/curvesim/pipelines/vol_limited_arb/strategy.py
@@ -1,7 +1,9 @@
+from typing import Type
+
 from curvesim.logging import get_logger
-from curvesim.metrics.state_log import StateLog
+from curvesim.metrics.state_log.log import StateLog
 from curvesim.pipelines.vol_limited_arb.trader import VolumeLimitedArbitrageur
-from curvesim.templates import Strategy
+from curvesim.templates import Log, Strategy, Trader
 
 logger = get_logger(__name__)
 
@@ -11,8 +13,8 @@ class VolumeLimitedStrategy(Strategy):
     Computes and executes volume-limited arbitrage trades at each timestep.
     """
 
-    trader_class = VolumeLimitedArbitrageur
-    state_log_class = StateLog
+    trader_class: Type[Trader] = VolumeLimitedArbitrageur
+    log_class: Type[Log] = StateLog
 
     def __init__(self, metrics, vol_mult):
         """
diff --git a/curvesim/pool/base.py b/curvesim/pool/base.py
index f72bf6e77..d6ce508fe 100644
--- a/curvesim/pool/base.py
+++ b/curvesim/pool/base.py
@@ -4,7 +4,9 @@
 """
 
 
-from curvesim.pool.snapshot import SnapshotMixin
+from typing import Optional, Type
+
+from curvesim.pool.snapshot import Snapshot, SnapshotMixin
 
 
 class Pool(SnapshotMixin):
@@ -21,7 +23,7 @@ class Pool(SnapshotMixin):
 
     # need to configure in derived class otherwise the
     # snapshotting will not work
-    snapshot_class = None
+    snapshot_class: Optional[Type[Snapshot]] = None
 
     @property
     def name(self):
diff --git a/curvesim/pool/cryptoswap/calcs/__init__.py b/curvesim/pool/cryptoswap/calcs/__init__.py
index fcf3dab78..7c1efbc4c 100644
--- a/curvesim/pool/cryptoswap/calcs/__init__.py
+++ b/curvesim/pool/cryptoswap/calcs/__init__.py
@@ -71,7 +71,7 @@ def get_y(A: int, gamma: int, xp: List[int], D: int, j: int) -> List[int]:
     if n_coins == 2:
         y_out: List[int] = [factory_2_coin.newton_y(A, gamma, xp, D, j), 0]
     elif n_coins == 3:
-        y_out: List[int] = tricrypto_ng.get_y(A, gamma, xp, D, j)
+        y_out = tricrypto_ng.get_y(A, gamma, xp, D, j)
     else:
         raise CurvesimValueError("More than 3 coins is not supported.")
 
@@ -93,7 +93,7 @@ def get_alpha(
         #
         # CAUTION: need to be wary of off-by-one errors from integer division.
         ma_half_time = ceil(ma_half_time * 1000 / 694)
-        alpha: int = tricrypto_ng.wad_exp(
+        alpha = tricrypto_ng.wad_exp(
             -1 * ((block_timestamp - last_prices_timestamp) * 10**18 // ma_half_time)
         )
     else:
diff --git a/curvesim/pool/cryptoswap/calcs/factory_2_coin.py b/curvesim/pool/cryptoswap/calcs/factory_2_coin.py
index e64fc2532..1d5b52841 100644
--- a/curvesim/pool/cryptoswap/calcs/factory_2_coin.py
+++ b/curvesim/pool/cryptoswap/calcs/factory_2_coin.py
@@ -79,9 +79,8 @@ def lp_price(virtual_price: int, price_oracle: List[int]) -> int:
     int
         Liquidity redeemable per LP token in units of token 0.
     """
-    price_oracle: int = price_oracle[0]
-
-    return 2 * virtual_price * _sqrt_int(price_oracle) // 10**18
+    p: int = price_oracle[0]
+    return 2 * virtual_price * _sqrt_int(p) // 10**18
 
 
 # pylint: disable-next=too-many-locals
@@ -109,10 +108,6 @@ def newton_y(  # noqa: complexity: 11
             frac: int = x[k] * 10**18 // D
             assert 10**16 <= frac <= 10**20
 
-    y: int = D // n_coins
-    K0_i: int = 10**18
-    S_i: int = 0
-
     x_sorted: List[int] = x.copy()
     x_sorted[i] = 0
     x_sorted = sorted(x_sorted, reverse=True)  # From high to low
@@ -164,7 +159,7 @@ def newton_y(  # noqa: complexity: 11
 
         diff: int = abs(y - y_prev)
         if diff < max(convergence_limit, y // 10**14):
-            frac: int = y * 10**18 // D
+            frac = y * 10**18 // D
             assert 10**16 <= frac <= 10**20  # dev: unsafe value for y
             return int(y)
 
@@ -176,7 +171,7 @@ def newton_D(  # noqa: complexity: 13
     ANN: int,
     gamma: int,
     x_unsorted: List[int],
-) -> List[int]:
+) -> int:
     """
     Finding the `D` invariant using Newton's method.
 
@@ -239,7 +234,7 @@ def newton_D(  # noqa: complexity: 13
         if diff * 10**14 < max(10**16, D):
             # Test that we are safe with the next newton_y
             for _x in x:
-                frac: int = _x * 10**18 // D
+                frac = _x * 10**18 // D
                 if frac < 10**16 or frac > 10**20:
                     raise CalculationError("Unsafe value for x[i]")
             return int(D)
diff --git a/curvesim/pool/cryptoswap/calcs/tricrypto_ng.py b/curvesim/pool/cryptoswap/calcs/tricrypto_ng.py
index bb47a6937..df6002eb7 100644
--- a/curvesim/pool/cryptoswap/calcs/tricrypto_ng.py
+++ b/curvesim/pool/cryptoswap/calcs/tricrypto_ng.py
@@ -51,11 +51,11 @@ def get_y(  # noqa: complexity: 18
     assert 10**17 <= D <= 10**15 * 10**18
 
     frac: int = 0
-    for k in range(3):
-        if k != i:
-            frac = x[k] * 10**18 // D
+    for _k in range(3):
+        if _k != i:
+            frac = x[_k] * 10**18 // D
             assert 10**16 <= frac <= 10**20, "Unsafe values x[i]"
-            # if above conditions are met, x[k] > 0
+            # if above conditions are met, x[_k] > 0
 
     j: int = 0
     k: int = 0
@@ -99,7 +99,7 @@ def get_y(  # noqa: complexity: 18
         _c: int = gamma2 * (-1 * _c_neg) // D * ANN // 27 // A_MULTIPLIER
         _c *= -1
     else:
-        _c: int = gamma2 * _c_neg // D * ANN // 27 // A_MULTIPLIER
+        _c = gamma2 * _c_neg // D * ANN // 27 // A_MULTIPLIER
     c += _c
 
     # (10**18 + gamma)**2/27
@@ -151,19 +151,19 @@ def get_y(  # noqa: complexity: 18
     if b_is_neg:
         delta0: int = -(_3ac // -b) - b
     else:
-        delta0: int = _3ac // b - b
+        delta0 = _3ac // b - b
 
     # 9*a*c/b - 2*b - 27*a**2/b*d/b
     if b_is_neg:
         delta1: int = -(3 * _3ac // -b) - 2 * b - 27 * a**2 // -b * d // -b
     else:
-        delta1: int = 3 * _3ac // b - 2 * b - 27 * a**2 // b * d // b
+        delta1 = 3 * _3ac // b - 2 * b - 27 * a**2 // b * d // b
 
     # delta1**2 + 4*delta0**2/b*delta0
     if b_is_neg:
         sqrt_arg: int = delta1**2 - (4 * delta0**2 // -b * delta0)
     else:
-        sqrt_arg: int = delta1**2 + 4 * delta0**2 // b * delta0
+        sqrt_arg = delta1**2 + 4 * delta0**2 // b * delta0
 
     sqrt_val: int = 0
     if sqrt_arg > 0:
@@ -187,13 +187,13 @@ def get_y(  # noqa: complexity: 18
     if second_cbrt < 0:
         C1: int = -(b_cbrt * b_cbrt // 10**18 * -second_cbrt // 10**18)
     else:
-        C1: int = b_cbrt * b_cbrt // 10**18 * second_cbrt // 10**18
+        C1 = b_cbrt * b_cbrt // 10**18 * second_cbrt // 10**18
 
     # (b + b*delta0/C1 - C1)/3
     if sign(b * delta0) != sign(C1):
         root_K0: int = (b + -(b * delta0 // -C1) - C1) // 3
     else:
-        root_K0: int = (b + b * delta0 // C1 - C1) // 3
+        root_K0 = (b + b * delta0 // C1 - C1) // 3
 
     # D*D/27/x_k*D/x_j*root_K0/a
     root: int = D * D // 27 // x_k * D // x_j * root_K0 // a
@@ -293,7 +293,7 @@ def _newton_y(  # noqa: complexity: 11  # pylint: disable=duplicate-code,too-man
 
         diff: int = abs(y - y_prev)
         if diff < max(convergence_limit, y // 10**14):
-            frac: int = y * 10**18 // D
+            frac = y * 10**18 // D
             assert 10**16 <= frac <= 10**20  # dev: unsafe value for y
             return int(y)
 
@@ -447,9 +447,6 @@ def newton_D(  # pylint: disable=too-many-locals
     D_minus: int = 0
     D_prev: int = 0
 
-    diff: int = 0
-    frac: int = 0
-
     D = mpz(D)
 
     for _ in range(255):
@@ -466,7 +463,7 @@ def newton_D(  # pylint: disable=too-many-locals
         _g1k0 = gamma + 10**18  # <--------- safe to do unsafe_add.
 
         # The following operations can safely be unsafe.
-        _g1k0: int = abs(_g1k0 - K0) + 1
+        _g1k0 = abs(_g1k0 - K0) + 1
 
         # D / (A * N**N) * _g1k0**2 / gamma**2
         # mul1 = 10**18 * D / gamma * _g1k0 / gamma * _g1k0 * A_MULTIPLIER / ANN
@@ -516,7 +513,7 @@ def newton_D(  # pylint: disable=too-many-locals
         else:
             D = (D_minus - D_plus) // 2
 
-        diff = abs(D - D_prev)
+        diff: int = abs(D - D_prev)
         # Could reduce precision for gas efficiency here:
         if diff * 10**14 < max(10**16, D):
             # Test that we are safe with the next get_y
diff --git a/curvesim/pool/cryptoswap/pool.py b/curvesim/pool/cryptoswap/pool.py
index 2f6cdcf81..8f3310e89 100644
--- a/curvesim/pool/cryptoswap/pool.py
+++ b/curvesim/pool/cryptoswap/pool.py
@@ -3,12 +3,12 @@
 """
 import time
 from math import isqrt, prod
-from typing import List
+from typing import List, Tuple, Type
 
 from curvesim.exceptions import CalculationError, CryptoPoolError, CurvesimValueError
 from curvesim.logging import get_logger
 from curvesim.pool.base import Pool
-from curvesim.pool.snapshot import CurveCryptoPoolBalanceSnapshot
+from curvesim.pool.snapshot import CurveCryptoPoolBalanceSnapshot, Snapshot
 
 from .calcs import (
     factory_2_coin,
@@ -30,7 +30,7 @@
 class CurveCryptoPool(Pool):  # pylint: disable=too-many-instance-attributes
     """Cryptoswap implementation in Python."""
 
-    snapshot_class = CurveCryptoPoolBalanceSnapshot
+    snapshot_class: Type[Snapshot] = CurveCryptoPoolBalanceSnapshot
 
     __slots__ = (
         "A",
@@ -58,7 +58,8 @@ class CurveCryptoPool(Pool):  # pylint: disable=too-many-instance-attributes
         "not_adjusted",
     )
 
-    def __init__(  # pylint: disable=too-many-locals,too-many-arguments
+    # pylint: disable-next=too-many-locals,too-many-arguments,too-many-branches
+    def __init__(
         self,
         A: int,
         gamma: int,
@@ -81,7 +82,7 @@ def __init__(  # pylint: disable=too-many-locals,too-many-arguments
         xcp_profit=10**18,
         xcp_profit_a=10**18,
         virtual_price=None,
-    ):
+    ) -> None:
         """
         Parameters
         ----------
@@ -279,7 +280,7 @@ def _get_xcp(self, D: int) -> int:
         ]
         return geometric_mean(x)
 
-    def _increment_timestamp(self, blocks=1, timestamp=None):
+    def _increment_timestamp(self, blocks=1, timestamp=None) -> None:
         """Update the internal clock used to mimic the block timestamp."""
         if timestamp:
             self._block_timestamp = timestamp
@@ -297,7 +298,7 @@ def _tweak_price(  # noqa: complexity: 12
         p_i: int,
         new_D: int,
         K0_prev: int = 0,
-    ):
+    ) -> None:
         """
         Applies several kinds of updates:
             - EMA price update: price_oracle
@@ -444,7 +445,7 @@ def _tweak_price(  # noqa: complexity: 12
         self.D = D_unadjusted
         self.virtual_price = virtual_price
 
-    def _claim_admin_fees(self):
+    def _claim_admin_fees(self) -> None:
         # no gulping logic needed for the python code
         xcp_profit: int = self.xcp_profit
         xcp_profit_a: int = self.xcp_profit_a
@@ -518,7 +519,7 @@ def get_dy(self, i: int, j: int, dx: int) -> int:
 
         return dy
 
-    def get_y(self, i, j, x, xp):
+    def get_y(self, i: int, j: int, x: int, xp: List[int]) -> int:
         r"""
         Calculate x[j] if one makes x[i] = x.
 
@@ -578,7 +579,7 @@ def _fee(self, xp: List[int]) -> int:
             K: int = 10**18
             for _x in xp:
                 K = K * n_coins * _x // _sum_xp
-            f: int = fee_gamma * 10**18 // (fee_gamma + 10**18 - K)
+            f = fee_gamma * 10**18 // (fee_gamma + 10**18 - K)
         return (self.mid_fee * f + self.out_fee * (10**18 - f)) // 10**18
 
     # pylint: disable-next=too-many-locals
@@ -588,7 +589,7 @@ def _exchange(
         j: int,
         dx: int,
         min_dy: int,
-    ) -> int:
+    ) -> Tuple[int, int]:
         assert i != j, "Indices must be different"
         assert i < self.n, "Index out of bounds"
         assert j < self.n, "Index out of bounds"
@@ -657,7 +658,7 @@ def exchange(
         j: int,
         dx: int,
         min_dy: int = 0,
-    ) -> int:
+    ) -> Tuple[int, int]:
         """
         Swap `dx` amount of the `i`-th coin for the `j`-th coin.
 
@@ -689,7 +690,7 @@ def exchange_underlying(
         j: int,
         dx: int,
         min_dy: int = 0,
-    ) -> int:
+    ) -> Tuple[int, int]:
         """
         In the vyper contract, this exchanges using ETH instead of WETH.
         In Curvesim, this is the same as `exchange`.
@@ -889,7 +890,7 @@ def _calc_withdraw_one_coin(
         i: int,
         update_D: bool,
         calc_price: bool,
-    ) -> (int, int, int, List[int]):
+    ) -> Tuple[int, int, int, List[int]]:
         token_supply: int = self.tokens
         assert token_amount <= token_supply  # dev: token amount more than supply
         assert i < self.n  # dev: coin out of range
@@ -915,9 +916,7 @@ def _calc_withdraw_one_coin(
         if i == 0:
             dy: int = (xp[i] - y) // precisions[i]
         else:
-            dy: int = (
-                (xp[i] - y) * PRECISION // (precisions[i] * self.price_scale[i - 1])
-            )
+            dy = (xp[i] - y) * PRECISION // (precisions[i] * self.price_scale[i - 1])
         xp[i] = y
 
         # FIXME: update for n coins
@@ -982,9 +981,9 @@ def lp_price(self) -> int:
             price: int = factory_2_coin.lp_price(virtual_price, price_oracle)
         elif self.n == 3:
             # 3-coin vyper contract uses cached packed oracle prices instead of internal_price_oracle()
-            virtual_price: int = self.virtual_price
-            price_oracle: List[int] = self._price_oracle
-            price: int = tricrypto_ng.lp_price(virtual_price, price_oracle)
+            virtual_price = self.virtual_price
+            price_oracle = self._price_oracle
+            price = tricrypto_ng.lp_price(virtual_price, price_oracle)
         else:
             raise CalculationError("LP price calc doesn't support more than 3 coins")
 
@@ -1004,7 +1003,7 @@ def internal_price_oracle(self) -> List[int]:
                 last_prices: List[int] = self.last_prices
             elif self.n == 3:
                 # 3-coin vyper contract caps every "last price" that gets fed to the EMA
-                last_prices: List[int] = self.last_prices.copy()
+                last_prices = self.last_prices.copy()
                 price_scale: List[int] = self.price_scale
                 last_prices = [
                     min(last_p, 2 * storage_p)
diff --git a/curvesim/pool/snapshot.py b/curvesim/pool/snapshot.py
index 1cb1acd90..afe60538d 100644
--- a/curvesim/pool/snapshot.py
+++ b/curvesim/pool/snapshot.py
@@ -1,9 +1,47 @@
 from abc import ABC, abstractmethod
 from contextlib import contextmanager
+from typing import Optional, Type
 
 from curvesim.exceptions import SnapshotError
 
 
+class Snapshot(ABC):
+    """
+    This class allows customization of snapshot logic, i.e.
+    controls how partial states are produced and restored.
+    """
+
+    @classmethod
+    @abstractmethod
+    def create(cls, pool):
+        """
+        Create a snapshot of the pool's state.
+
+        Parameters
+        -----------
+        pool: object
+            The object whose state we are saving as a snapshot.
+
+        Returns
+        -------
+        Snapshot
+            The saved data from the pool state.
+        """
+        raise NotImplementedError
+
+    @abstractmethod
+    def restore(self, pool):
+        """
+        Update the pool's state using the snapshot data.
+
+        Parameters
+        -----------
+        pool: object
+            The object whose state we have saved as a snapshot.
+        """
+        raise NotImplementedError
+
+
 class SnapshotMixin:
     """
     Pool mixin to allow ability to snapshot partial states
@@ -13,7 +51,7 @@ class SnapshotMixin:
     implements the `Snapshot` interface.
     """
 
-    snapshot_class = None
+    snapshot_class: Optional[Type[Snapshot]] = None
 
     def get_snapshot(self):
         """Saves the pool's partial state."""
@@ -58,43 +96,6 @@ def use_snapshot_context(self):
             self.revert_to_snapshot(snapshot)
 
 
-class Snapshot(ABC):
-    """
-    This class allows customization of snapshot logic, i.e.
-    controls how partial states are produced and restored.
-    """
-
-    @classmethod
-    @abstractmethod
-    def create(cls, pool):
-        """
-        Create a snapshot of the pool's state.
-
-        Parameters
-        -----------
-        pool: object
-            The object whose state we are saving as a snapshot.
-
-        Returns
-        -------
-        Snapshot
-            The saved data from the pool state.
-        """
-        raise NotImplementedError
-
-    @abstractmethod
-    def restore(self, pool):
-        """
-        Update the pool's state using the snapshot data.
-
-        Parameters
-        -----------
-        pool: object
-            The object whose state we have saved as a snapshot.
-        """
-        raise NotImplementedError
-
-
 class CurvePoolBalanceSnapshot(Snapshot):
     """Snapshot that saves pool balances and admin balances."""
 
diff --git a/curvesim/pool/stableswap/metapool.py b/curvesim/pool/stableswap/metapool.py
index d1ad819fe..a62478caf 100644
--- a/curvesim/pool/stableswap/metapool.py
+++ b/curvesim/pool/stableswap/metapool.py
@@ -2,11 +2,12 @@
 Mainly a module to house the `MetaPool`, a metapool stableswap implementation in Python.
 """
 from math import prod
+from typing import Type
 
 from gmpy2 import mpz
 
 from curvesim.exceptions import CurvesimValueError
-from curvesim.pool.snapshot import CurveMetaPoolBalanceSnapshot
+from curvesim.pool.snapshot import CurveMetaPoolBalanceSnapshot, Snapshot
 
 from ..base import Pool
 
@@ -16,7 +17,7 @@ class CurveMetaPool(Pool):  # pylint: disable=too-many-instance-attributes
     Basic stableswap metapool implementation in Python.
     """
 
-    snapshot_class = CurveMetaPoolBalanceSnapshot
+    snapshot_class: Type[Snapshot] = CurveMetaPoolBalanceSnapshot
 
     __slots__ = (
         "A",
diff --git a/curvesim/pool/stableswap/pool.py b/curvesim/pool/stableswap/pool.py
index 18a0fcb14..33e31169e 100644
--- a/curvesim/pool/stableswap/pool.py
+++ b/curvesim/pool/stableswap/pool.py
@@ -2,11 +2,12 @@
 Mainly a module to house the `Pool`, a basic stableswap implementation in Python.
 """
 from math import prod
+from typing import Type
 
 from gmpy2 import mpz
 
 from curvesim.exceptions import CurvesimValueError
-from curvesim.pool.snapshot import CurvePoolBalanceSnapshot
+from curvesim.pool.snapshot import CurvePoolBalanceSnapshot, Snapshot
 
 from ..base import Pool
 
@@ -16,7 +17,7 @@ class CurvePool(Pool):  # pylint: disable=too-many-instance-attributes
     Basic stableswap implementation in Python.
     """
 
-    snapshot_class = CurvePoolBalanceSnapshot
+    snapshot_class: Type[Snapshot] = CurvePoolBalanceSnapshot
 
     __slots__ = (
         "A",
diff --git a/curvesim/templates/__init__.py b/curvesim/templates/__init__.py
index 31b16de4d..15cb2ad44 100644
--- a/curvesim/templates/__init__.py
+++ b/curvesim/templates/__init__.py
@@ -3,6 +3,7 @@
 """
 
 __all__ = [
+    "Log",
     "Trader",
     "Strategy",
     "SimAssets",
@@ -14,6 +15,7 @@
     "PriceSampler",
 ]
 
+from .log import Log
 from .param_samplers import ParameterSampler
 from .price_samplers import PriceSample, PriceSampler
 from .sim_assets import SimAssets
diff --git a/curvesim/templates/log.py b/curvesim/templates/log.py
new file mode 100644
index 000000000..9cea44923
--- /dev/null
+++ b/curvesim/templates/log.py
@@ -0,0 +1,11 @@
+from abc import ABC, abstractmethod
+
+
+class Log(ABC):
+    @abstractmethod
+    def update(self, **kwargs):
+        """Updates log data with event data."""
+
+    @abstractmethod
+    def compute_metrics(self):
+        """Computes metrics from the accumulated log data."""
diff --git a/curvesim/templates/strategy.py b/curvesim/templates/strategy.py
index eb944af05..9677975dd 100644
--- a/curvesim/templates/strategy.py
+++ b/curvesim/templates/strategy.py
@@ -1,7 +1,11 @@
 from abc import ABC, abstractmethod
+from typing import Optional, Type
 
 from curvesim.logging import get_logger
 
+from .log import Log
+from .trader import Trader
+
 logger = get_logger(__name__)
 
 
@@ -9,14 +13,14 @@ class Strategy(ABC):
     """
     A Strategy defines the trading approach used during each step of a simulation.
     It executes the trades using an injected `Trader` class and then logs the
-    changes using the injected `StateLog` class.
+    changes using the injected `Log` class.
 
     Class Attributes
     ----------------
-    trader_class : :class:`~curvesim.pipelines.templates.Trader`
+    trader_class : :class:`~curvesim.templates.Trader`
         Class for creating trader instances.
-    state_log_class : :class:`~curvesim.metrics.StateLog`
-        Class for creating state logger instances.
+    log_class : :class:`~curvesim.templates.Log`
+        Class for creating log instances.
 
     Attributes
     ----------
@@ -26,8 +30,8 @@ class Strategy(ABC):
 
     # These classes should be injected in child classes
     # to create the desired behavior.
-    trader_class = None
-    state_log_class = None
+    trader_class: Optional[Type[Trader]] = None
+    log_class: Optional[Type[Log]] = None
 
     def __init__(self, metrics):
         """
@@ -63,7 +67,7 @@ def __call__(self, pool, parameters, price_sampler):
         """
         # pylint: disable=not-callable
         trader = self.trader_class(pool)
-        state_log = self.state_log_class(pool, self.metrics)
+        log = self.log_class(pool, self.metrics)
 
         parameters = parameters or "no parameter changes"
         logger.info("[%s] Simulating with %s", pool.symbol, parameters)
@@ -74,9 +78,9 @@ def __call__(self, pool, parameters, price_sampler):
             pool.prepare_for_trades(sample.timestamp)
             trader_args = self._get_trader_inputs(sample)
             trade_data = trader.process_time_sample(*trader_args)
-            state_log.update(price_sample=sample, trade_data=trade_data)
+            log.update(price_sample=sample, trade_data=trade_data)
 
-        return state_log.compute_metrics()
+        return log.compute_metrics()
 
     @abstractmethod
     def _get_trader_inputs(self, sample):
diff --git a/requirements.txt b/requirements.txt
index 020cf166f..43bd29783 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,16 +2,16 @@
 # "Core" dependencies used for the package.
 # These bounds should match the ones in `setup.cfg`
 
-numpy==1.25.1
-pandas==2.0.3
-scipy==1.11.1
+numpy==1.25.2
+pandas==2.1.0
+scipy==1.11.2
 gmpy2==2.1.5
-matplotlib==3.7.2
-web3==6.6.1
+matplotlib==3.7.3
+web3==6.9.0
 requests==2.31.0
-tenacity==8.2.2
+tenacity==8.2.3
 python-dotenv==1.0.0
-altair==5.0.1
+altair==5.1.1
 # Dependencies used for setting up a venv for development.
 # These should be pinned to specific versions.
 black==22.6.0
@@ -28,38 +28,39 @@ coverage==7.0.5
 titanoboa==0.1.7
 Sphinx==5.3.0
 Pallets-Sphinx-Themes==2.0.3
+mypy==1.5.1
 ## The following requirements were added by pip freeze:
 aiohttp==3.8.5
 aiosignal==1.3.1
 alabaster==0.7.13
-asttokens==2.2.1
-async-timeout==4.0.2
+asttokens==2.4.0
+async-timeout==4.0.3
 attrs==23.1.0
 Babel==2.12.1
-bitarray==2.7.6
+bitarray==2.8.1
 cached-property==1.5.2
-certifi==2023.5.7
+certifi==2023.7.22
 charset-normalizer==3.2.0
-click==8.1.6
+click==8.1.7
 click-log==0.4.0
 contourpy==1.1.0
 cycler==0.11.0
-cytoolz==0.12.1
-dill==0.3.6
+cytoolz==0.12.2
+dill==0.3.7
 docutils==0.19
-eth-abi==4.1.0
+eth-abi==4.2.1
 eth-account==0.9.0
 eth-bloom==2.0.0
 eth-hash==0.5.2
 eth-keyfile==0.6.1
 eth-keys==0.4.0
 eth-rlp==0.3.0
-eth-stdlib==0.2.6
+eth-stdlib==0.2.7
 eth-typing==3.4.0
-eth-utils==2.2.0
-exceptiongroup==1.1.2
+eth-utils==2.2.1
+exceptiongroup==1.1.3
 execnet==2.0.2
-fonttools==4.41.0
+fonttools==4.42.1
 frozenlist==1.4.0
 hexbytes==0.3.1
 idna==3.4
@@ -68,9 +69,9 @@ importlib-metadata==6.8.0
 iniconfig==2.0.0
 isort==5.12.0
 Jinja2==3.1.2
-jsonschema==4.18.4
+jsonschema==4.19.0
 jsonschema-specifications==2023.7.1
-kiwisolver==1.4.4
+kiwisolver==1.4.5
 lazy-object-proxy==1.9.0
 lru-dict==1.2.0
 markdown-it-py==3.0.0
@@ -78,44 +79,43 @@ MarkupSafe==2.1.3
 mccabe==0.7.0
 mdurl==0.1.2
 multidict==6.0.4
-mypy-extensions==0.4.4
+mypy-extensions==1.0.0
 packaging==23.1
 parsimonious==0.9.0
-pathspec==0.11.1
+pathspec==0.11.2
 Pillow==10.0.0
-platformdirs==3.9.1
-pluggy==1.2.0
-protobuf==4.23.4
+platformdirs==3.10.0
+pluggy==1.3.0
+protobuf==4.24.3
 py==1.11.0
 py-ecc==6.0.0
-py-evm==0.7.0a3
+py-evm==0.7.0a4
 pycodestyle==2.9.1
 pycryptodome==3.18.0
 pyethash==0.1.27
 pyflakes==2.5.0
-Pygments==2.15.1
-pyparsing==3.0.9
+Pygments==2.16.1
+pyparsing==3.1.1
 python-dateutil==2.8.2
-pytz==2023.3
+pytz==2023.3.post1
 pyunormalize==15.0.0
-referencing==0.30.0
-regex==2023.6.3
-rich==13.4.2
+referencing==0.30.2
+regex==2023.8.8
+rich==13.5.2
 rlp==3.0.0
-rpds-py==0.9.2
-safe-pysha3==1.0.4
+rpds-py==0.10.3
 semantic-version==2.10.0
 six==1.16.0
 snowballstemmer==2.2.0
 sortedcontainers==2.4.0
-sphinxcontrib-applehelp==1.0.4
-sphinxcontrib-devhelp==1.0.2
-sphinxcontrib-htmlhelp==2.0.1
+sphinxcontrib-applehelp==1.0.7
+sphinxcontrib-devhelp==1.0.5
+sphinxcontrib-htmlhelp==2.0.4
 sphinxcontrib-jsmath==1.0.1
-sphinxcontrib-qthelp==1.0.3
-sphinxcontrib-serializinghtml==1.1.5
+sphinxcontrib-qthelp==1.0.6
+sphinxcontrib-serializinghtml==1.1.9
 tomli==2.0.1
-tomlkit==0.11.8
+tomlkit==0.12.1
 toolz==0.12.0
 trie==2.1.1
 typing_extensions==4.7.1
diff --git a/requirements_dev.txt b/requirements_dev.txt
index 3551d4a42..eed86f369 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -20,3 +20,5 @@ titanoboa==0.1.7  # 0.1.6 for python versions before 3.10
 
 sphinx==5.3.0 
 Pallets-Sphinx-Themes==2.0.3
+
+mypy==1.5.1
diff --git a/setup.cfg b/setup.cfg
index 1784caa91..3b44297a2 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -39,6 +39,24 @@ filterwarnings =
 	ignore::DeprecationWarning:altair.*:
 	ignore::UserWarning:vyper.*:
 
+[mypy]
+warn_unused_configs = True
+
+[mypy-altair]
+ignore_missing_imports = True
+[mypy-pandas]
+ignore_missing_imports = True
+[mypy-gmpy2]
+ignore_missing_imports = True
+[mypy-matplotlib]
+ignore_missing_imports = True
+[mypy-matplotlib.pyplot]
+ignore_missing_imports = True
+[mypy-scipy]
+ignore_missing_imports = True
+[mypy-scipy.optimize]
+ignore_missing_imports = True
+
 [bumpversion:file:curvesim/version.py]
 
 [metadata]