diff --git a/Makefile b/Makefile
index 142b052..fbe4bb3 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 .PHONY: test typecheck lint precommit docs
 
 test:
-	poetry run pytest -v --cov=uniswap --cov-report html
+	poetry run pytest -v --cov=uniswap --cov-report html --cov-report term
 
 typecheck:
 	poetry run mypy --pretty
diff --git a/docs/cli.rst b/docs/cli.rst
new file mode 100644
index 0000000..def0284
--- /dev/null
+++ b/docs/cli.rst
@@ -0,0 +1,42 @@
+Command line interface
+======================
+
+uniswap-python provides a basic command line interface named ``unipy``, to let you easier query the chain for things like the current price and token metadata.
+
+Examples
+--------
+
+**Note:** uniswap-python contains a small database of token contract addresses for convenience. You can always provide a contract address in place of a shorthand, and need to do so for all tokens not in the bundled database, or if you're not on mainnet.
+
+.. code:: shell
+
+    # Get price for 1 WETH quoted in DAI
+    $ unipy price WETH DAI
+    3350.883387688622
+
+    # Get price for 1 WETH quoted in DAI, skip decimal normalization
+    $ unipy price --raw WETH DAI
+    3350883387688622003541
+
+    # Get price for 1 WETH quoted in USDT
+    $ unipy price WETH 0xdac17f958d2ee523a2206206994597c13d831ec7
+    3348.128969
+
+    # Get token metadata from its ERC20 contract
+    $ unipy token 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2
+    {'name': 'Wrapped Ether', 'symbol': 'WETH', 'decimals': 18}
+
+    # List known/hardcoded tokens, with metadata
+    $ unipy tokendb --metadata
+    {'name': 'Wrapped Ether', 'symbol': 'WETH', 'decimals': 18}
+    {'name': 'Dai Stablecoin', 'symbol': 'DAI', 'decimals': 18}
+    {'name': 'Wrapped BTC', 'symbol': 'WBTC', 'decimals': 8}
+    ...
+
+
+Usage
+-----
+
+.. click:: uniswap.cli:main
+   :prog: unipy
+   :nested: full
diff --git a/docs/conf.py b/docs/conf.py
index e384acd..6d24e80 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -28,7 +28,7 @@
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ["sphinx.ext.autodoc"]
+extensions = ["sphinx.ext.autodoc", "sphinx_click"]
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ["_templates"]
diff --git a/docs/forks.rst b/docs/forks.rst
index 7b2c4ce..d0f97db 100644
--- a/docs/forks.rst
+++ b/docs/forks.rst
@@ -1,6 +1,11 @@
 Using uniswap-python for Uniswap forks
 ======================================
 
-While not officially supported, you can use this library to trade across several Uniswap forks like Sushiswap (mainnet), Honeyswap (xDai), Pancakeswap (BSC), etc.
+While not officially supported, you can use this library to trade across several Uniswap forks, like:
 
+- Sushiswap (mainnet)
+- Honeyswap (xDai)
+- Pancakeswap (BSC)
+- And any other forks that don't deviate too much from the ABI.
 
+See the issues for details about how to do so.
diff --git a/docs/index.rst b/docs/index.rst
index ff12df1..11bc946 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -16,6 +16,7 @@ Welcome to uniswap-python's documentation!
    :caption: Contents:
 
    api
+   cli 
    examples
    forks
 
diff --git a/poetry.lock b/poetry.lock
index ac9e859..fe3c12e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2,7 +2,7 @@
 name = "alabaster"
 version = "0.7.12"
 description = "A configurable sidebar-enabled Sphinx theme"
-category = "dev"
+category = "main"
 optional = false
 python-versions = "*"
 
@@ -24,23 +24,23 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "attrs"
-version = "19.3.0"
+version = "20.3.0"
 description = "Classes Without Boilerplate"
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.extras]
-azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
-dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
-docs = ["sphinx", "zope.interface"]
-tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+docs = ["furo", "sphinx", "zope.interface"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
 
 [[package]]
 name = "babel"
 version = "2.9.1"
 description = "Internationalization utilities"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
@@ -49,12 +49,15 @@ pytz = ">=2015.7"
 
 [[package]]
 name = "base58"
-version = "2.0.1"
-description = "Base58 and Base58Check implementation"
+version = "2.1.0"
+description = "Base58 and Base58Check implementation."
 category = "main"
 optional = false
 python-versions = ">=3.5"
 
+[package.extras]
+tests = ["pytest (>=4.6)", "pytest-flake8", "pytest-cov", "PyHamcrest (>=2.0.2)", "coveralls", "pytest-benchmark"]
+
 [[package]]
 name = "beautifulsoup4"
 version = "4.9.3"
@@ -100,7 +103,7 @@ d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
 name = "certifi"
-version = "2020.6.20"
+version = "2020.12.5"
 description = "Python package for providing Mozilla's CA Bundle."
 category = "main"
 optional = false
@@ -108,31 +111,31 @@ python-versions = "*"
 
 [[package]]
 name = "chardet"
-version = "3.0.4"
+version = "4.0.0"
 description = "Universal encoding detector for Python 2 and 3"
 category = "main"
 optional = false
-python-versions = "*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "click"
 version = "7.1.2"
 description = "Composable command line interface toolkit"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "colorama"
-version = "0.4.3"
+version = "0.4.4"
 description = "Cross-platform colored terminal text."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "coverage"
-version = "5.2"
+version = "5.5"
 description = "Code coverage measurement for Python"
 category = "dev"
 optional = false
@@ -143,7 +146,7 @@ toml = ["toml"]
 
 [[package]]
 name = "cytoolz"
-version = "0.10.1"
+version = "0.11.0"
 description = "Cython implementation of Toolz: High performance functional utilities"
 category = "main"
 optional = false
@@ -159,7 +162,7 @@ cython = ["cython"]
 name = "docutils"
 version = "0.16"
 description = "Docutils -- Python Documentation Utilities"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
@@ -185,7 +188,7 @@ tools = ["hypothesis (>=3.6.1,<4)"]
 
 [[package]]
 name = "eth-account"
-version = "0.5.2"
+version = "0.5.4"
 description = "eth-account: Sign Ethereum transactions and messages with local private keys"
 category = "main"
 optional = false
@@ -196,35 +199,36 @@ bitarray = ">=1.2.1,<1.3.0"
 eth-abi = ">=2.0.0b7,<3"
 eth-keyfile = ">=0.5.0,<0.6.0"
 eth-keys = ">=0.2.1,<0.3.2 || >0.3.2,<0.4.0"
-eth-rlp = ">=0.1.2,<1"
+eth-rlp = ">=0.1.2,<2"
 eth-utils = ">=1.3.0,<2"
 hexbytes = ">=0.1.0,<1"
-rlp = ">=1.0.0,<2"
+rlp = ">=1.0.0,<3"
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "pytest-watch (>=4.1.0,<5)", "wheel", "twine", "ipython", "hypothesis (>=4.18.0,<5)", "pytest (>=4.4.0,<5)", "pytest-xdist", "tox (>=2.9.1,<3)", "flake8 (==3.7.9)", "isort (>=4.2.15,<5)", "mypy (==0.701)", "pydocstyle (>=3.0.0,<4)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)", "towncrier (>=19.2.0,<20)"]
+dev = ["Sphinx (>=1.6.5,<2)", "bumpversion (>=0.5.3,<1)", "flake8 (==3.7.9)", "hypothesis (>=4.18.0,<5)", "ipython", "isort (>=4.2.15,<5)", "mypy (==0.701)", "pydocstyle (>=3.0.0,<4)", "pytest-watch (>=4.1.0,<5)", "pytest-xdist", "pytest (>=4.4.0,<5)", "sphinx-rtd-theme (>=0.1.9)", "towncrier (>=19.2.0,<20)", "tox (>=2.9.1,<3)", "twine", "wheel"]
 doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)", "towncrier (>=19.2.0,<20)"]
 lint = ["flake8 (==3.7.9)", "isort (>=4.2.15,<5)", "mypy (==0.701)", "pydocstyle (>=3.0.0,<4)"]
-test = ["hypothesis (>=4.18.0,<5)", "pytest (>=4.4.0,<5)", "pytest-xdist", "tox (>=2.9.1,<3)"]
+test = ["hypothesis (>=4.18.0,<5)", "pytest-xdist", "pytest (>=4.4.0,<5)", "tox (>=2.9.1,<3)"]
 
 [[package]]
 name = "eth-hash"
-version = "0.2.0"
+version = "0.3.1"
 description = "eth-hash: The Ethereum hashing function, keccak256, sometimes (erroneously) called sha3"
 category = "main"
 optional = false
 python-versions = ">=3.5, <4"
 
 [package.dependencies]
+eth-utils = ">=1,<2"
 pycryptodome = {version = ">=3.6.6,<4", optional = true, markers = "extra == \"pycryptodome\""}
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "pytest-xdist", "pytest-watch (>=4.1.0,<5)", "wheel", "ipython", "pytest (==3.3.2)", "tox (>=2.9.1,<3)", "flake8 (==3.4.1)", "isort (>=4.2.15,<5)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-lint = ["flake8 (==3.4.1)", "isort (>=4.2.15,<5)"]
+dev = ["bumpversion (>=0.5.3,<1)", "pytest-watch (>=4.1.0,<5)", "wheel", "twine", "ipython", "pytest (==5.4.1)", "pytest-xdist", "tox (==3.14.6)", "flake8 (==3.7.9)", "isort (>=4.2.15,<5)", "mypy (==0.770)", "pydocstyle (>=5.0.0,<6)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9,<1)", "towncrier (>=19.2.0,<20)"]
+doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9,<1)", "towncrier (>=19.2.0,<20)"]
+lint = ["flake8 (==3.7.9)", "isort (>=4.2.15,<5)", "mypy (==0.770)", "pydocstyle (>=5.0.0,<6)"]
 pycryptodome = ["pycryptodome (>=3.6.6,<4)"]
 pysha3 = ["pysha3 (>=1.0.0,<2.0.0)"]
-test = ["pytest (==3.3.2)", "tox (>=2.9.1,<3)"]
+test = ["pytest (==5.4.1)", "pytest-xdist", "tox (==3.14.6)"]
 
 [[package]]
 name = "eth-keyfile"
@@ -261,71 +265,70 @@ test = ["asn1tools (>=0.146.2,<0.147)", "pyasn1 (>=0.4.5,<0.5)", "pytest (==3.2.
 
 [[package]]
 name = "eth-rlp"
-version = "0.1.2"
+version = "0.2.1"
 description = "eth-rlp: RLP definitions for common Ethereum objects in Python"
 category = "main"
 optional = false
-python-versions = ">=3.5, <4"
+python-versions = ">=3.6, <4"
 
 [package.dependencies]
 eth-utils = ">=1.0.1,<2"
 hexbytes = ">=0.1.0,<1"
-rlp = ">=0.6.0,<2"
+rlp = ">=0.6.0,<3"
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "pytest-xdist", "pytest-watch (>=4.1.0,<5)", "wheel", "ipython", "pytest (==3.3.2)", "tox (>=2.9.1,<3)", "eth-hash", "flake8 (==3.4.1)", "isort (>=4.2.15,<5)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-lint = ["flake8 (==3.4.1)", "isort (>=4.2.15,<5)"]
-test = ["pytest (==3.3.2)", "tox (>=2.9.1,<3)", "eth-hash"]
+dev = ["Sphinx (>=1.6.5,<2)", "bumpversion (>=0.5.3,<1)", "eth-hash", "flake8 (==3.7.9)", "ipython", "isort (>=4.2.15,<5)", "mypy (==0.770)", "pydocstyle (>=3.0.0,<4)", "pytest-watch (>=4.1.0,<5)", "pytest-xdist", "pytest (==5.4.1)", "sphinx-rtd-theme (>=0.1.9)", "towncrier (>=19.2.0,<20)", "tox (==3.14.6)", "twine", "wheel"]
+doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)", "towncrier (>=19.2.0,<20)"]
+lint = ["flake8 (==3.7.9)", "isort (>=4.2.15,<5)", "mypy (==0.770)", "pydocstyle (>=3.0.0,<4)"]
+test = ["eth-hash", "pytest-xdist", "pytest (==5.4.1)", "tox (==3.14.6)"]
 
 [[package]]
 name = "eth-typing"
-version = "2.2.1"
+version = "2.2.2"
 description = "eth-typing: Common type annotations for ethereum python packages"
 category = "main"
 optional = false
 python-versions = ">=3.5, <4"
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "pytest-watch (>=4.1.0,<5)", "wheel", "twine", "ipython", "pytest (>=4.4,<4.5)", "pytest-xdist", "tox (>=2.9.1,<3)", "flake8 (==3.4.1)", "isort (>=4.2.15,<5)", "mypy (==0.701)", "pydocstyle (>=3.0.0,<4)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
+dev = ["bumpversion (>=0.5.3,<1)", "pytest-watch (>=4.1.0,<5)", "wheel", "twine", "ipython", "pytest (>=4.4,<4.5)", "pytest-xdist", "tox (>=2.9.1,<3)", "flake8 (==3.8.3)", "isort (>=4.2.15,<5)", "mypy (==0.782)", "pydocstyle (>=3.0.0,<4)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
 doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
-lint = ["flake8 (==3.4.1)", "isort (>=4.2.15,<5)", "mypy (==0.701)", "pydocstyle (>=3.0.0,<4)"]
+lint = ["flake8 (==3.8.3)", "isort (>=4.2.15,<5)", "mypy (==0.782)", "pydocstyle (>=3.0.0,<4)"]
 test = ["pytest (>=4.4,<4.5)", "pytest-xdist", "tox (>=2.9.1,<3)"]
 
 [[package]]
 name = "eth-utils"
-version = "1.9.0"
-description = "Common utility functions for ethereum codebases."
+version = "1.10.0"
+description = "eth-utils: Common utility functions for python code that interacts with Ethereum"
 category = "main"
 optional = false
 python-versions = ">=3.5,!=3.5.2,<4"
 
 [package.dependencies]
 cytoolz = {version = ">=0.10.1,<1.0.0", markers = "implementation_name == \"cpython\""}
-eth-hash = ">=0.1.0,<1.0.0"
+eth-hash = ">=0.3.1,<0.4.0"
 eth-typing = ">=2.2.1,<3.0.0"
 toolz = {version = ">0.8.2,<1", markers = "implementation_name == \"pypy\""}
 
 [package.extras]
-deploy = ["bumpversion (>=0.5.3,<1.0.0)", "tox (>=2.9.1,<3.0.0)", "wheel (>=0.30.0,<1.0.0)"]
-dev = ["twine (>=1.13,<2)", "Sphinx (>=1.5.5,<2)", "sphinx-rtd-theme (>=0.1.9,<2)", "towncrier (>=19.2.0,<20)", "black (>=18.6b4,<19)", "flake8 (>=3.7.0,<4.0.0)", "isort (==4.3.18)", "mypy (==0.701)", "pytest (>=3.4.1,<4.0.0)", "hypothesis (>=4.43.0,<5.0.0)", "pytest-pythonpath (>=0.3,<1.0)", "bumpversion (>=0.5.3,<1.0.0)", "tox (>=2.9.1,<3.0.0)", "wheel (>=0.30.0,<1.0.0)"]
-doc = ["Sphinx (>=1.5.5,<2)", "sphinx-rtd-theme (>=0.1.9,<2)", "towncrier (>=19.2.0,<20)"]
-lint = ["black (>=18.6b4,<19)", "flake8 (>=3.7.0,<4.0.0)", "isort (==4.3.18)", "mypy (==0.701)", "pytest (>=3.4.1,<4.0.0)"]
-test = ["hypothesis (>=4.43.0,<5.0.0)", "pytest (>=3.4.1,<4.0.0)", "pytest-pythonpath (>=0.3,<1.0)"]
+dev = ["bumpversion (>=0.5.3,<1)", "pytest-watch (>=4.1.0,<5)", "wheel (>=0.30.0,<1.0.0)", "twine (>=1.13,<2)", "ipython", "hypothesis (>=4.43.0,<5.0.0)", "pytest (==5.4.1)", "pytest-xdist", "tox (==3.14.6)", "black (>=18.6b4,<19)", "flake8 (==3.7.9)", "isort (>=4.2.15,<5)", "mypy (==0.720)", "pydocstyle (>=5.0.0,<6)", "pytest (>=3.4.1,<4.0.0)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9,<2)", "towncrier (>=19.2.0,<20)"]
+doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9,<2)", "towncrier (>=19.2.0,<20)"]
+lint = ["black (>=18.6b4,<19)", "flake8 (==3.7.9)", "isort (>=4.2.15,<5)", "mypy (==0.720)", "pydocstyle (>=5.0.0,<6)", "pytest (>=3.4.1,<4.0.0)"]
+test = ["hypothesis (>=4.43.0,<5.0.0)", "pytest (==5.4.1)", "pytest-xdist", "tox (==3.14.6)"]
 
 [[package]]
 name = "flake8"
-version = "3.8.3"
+version = "3.9.1"
 description = "the modular source code checker: pep8 pyflakes and co"
 category = "dev"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 
 [package.dependencies]
 importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 mccabe = ">=0.6.0,<0.7.0"
-pycodestyle = ">=2.6.0a1,<2.7.0"
-pyflakes = ">=2.2.0,<2.3.0"
+pycodestyle = ">=2.7.0,<2.8.0"
+pyflakes = ">=2.3.0,<2.4.0"
 
 [[package]]
 name = "hexbytes"
@@ -353,28 +356,29 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 name = "imagesize"
 version = "1.2.0"
 description = "Getting image size from png/jpeg/jpeg2000/gif file"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "importlib-metadata"
-version = "1.7.0"
+version = "4.0.1"
 description = "Read metadata from Python packages"
 category = "main"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
+python-versions = ">=3.6"
 
 [package.dependencies]
+typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
 zipp = ">=0.5"
 
 [package.extras]
-docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
 
 [[package]]
 name = "ipfshttpclient"
-version = "0.6.0.post1"
+version = "0.6.1"
 description = "Python IPFS HTTP CLIENT library"
 category = "main"
 optional = false
@@ -388,7 +392,7 @@ requests = ">=2.11"
 name = "jinja2"
 version = "2.11.3"
 description = "A very fast and expressive template engine."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
@@ -418,7 +422,7 @@ format_nongpl = ["idna", "jsonpointer (>1.13)", "webcolors", "rfc3986-validator
 
 [[package]]
 name = "lru-dict"
-version = "1.1.6"
+version = "1.1.7"
 description = "An Dict like LRU container."
 category = "main"
 optional = false
@@ -428,7 +432,7 @@ python-versions = "*"
 name = "markupsafe"
 version = "1.1.1"
 description = "Safely add untrusted strings to HTML/XML markup."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
 
@@ -442,7 +446,7 @@ python-versions = "*"
 
 [[package]]
 name = "more-itertools"
-version = "8.4.0"
+version = "8.7.0"
 description = "More routines for operating on iterables, beyond itertools"
 category = "dev"
 optional = false
@@ -496,15 +500,14 @@ python-versions = "*"
 
 [[package]]
 name = "packaging"
-version = "20.4"
+version = "20.9"
 description = "Core utilities for Python packages"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
-six = "*"
 
 [[package]]
 name = "parsimonious"
@@ -519,7 +522,7 @@ six = ">=1.9.0"
 
 [[package]]
 name = "pathspec"
-version = "0.8.0"
+version = "0.8.1"
 description = "Utility library for gitignore style pattern matching of file paths."
 category = "dev"
 optional = false
@@ -541,7 +544,7 @@ dev = ["pre-commit", "tox"]
 
 [[package]]
 name = "protobuf"
-version = "3.12.2"
+version = "3.15.8"
 description = "Protocol Buffers"
 category = "main"
 optional = false
@@ -552,7 +555,7 @@ six = ">=1.9"
 
 [[package]]
 name = "py"
-version = "1.9.0"
+version = "1.10.0"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
 category = "dev"
 optional = false
@@ -560,7 +563,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pycodestyle"
-version = "2.6.0"
+version = "2.7.0"
 description = "Python style guide checker"
 category = "dev"
 optional = false
@@ -568,11 +571,11 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pycryptodome"
-version = "3.9.8"
+version = "3.10.1"
 description = "Cryptographic library for Python"
 category = "main"
 optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "pydata-sphinx-theme"
@@ -593,7 +596,7 @@ test = ["sphinx", "numpydoc", "recommonmark", "pandas", "pytest", "pytest-regres
 
 [[package]]
 name = "pyflakes"
-version = "2.2.0"
+version = "2.3.1"
 description = "passive checker of Python programs"
 category = "dev"
 optional = false
@@ -603,7 +606,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 name = "pygments"
 version = "2.9.0"
 description = "Pygments is a syntax highlighting package written in Python."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -611,7 +614,7 @@ python-versions = ">=3.5"
 name = "pyparsing"
 version = "2.4.7"
 description = "Python parsing module"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
@@ -628,14 +631,11 @@ pywin32 = ">=223"
 
 [[package]]
 name = "pyrsistent"
-version = "0.16.0"
+version = "0.17.3"
 description = "Persistent/Functional/Immutable data structures"
 category = "main"
 optional = false
-python-versions = "*"
-
-[package.dependencies]
-six = "*"
+python-versions = ">=3.5"
 
 [[package]]
 name = "pytest"
@@ -662,14 +662,14 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 
 [[package]]
 name = "pytest-cov"
-version = "2.10.0"
+version = "2.11.1"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-coverage = ">=4.4"
+coverage = ">=5.2.1"
 pytest = ">=4.6"
 
 [package.extras]
@@ -702,13 +702,13 @@ cli = ["click (>=5.0)"]
 name = "pytz"
 version = "2021.1"
 description = "World timezone definitions, modern and historical"
-category = "dev"
+category = "main"
 optional = false
 python-versions = "*"
 
 [[package]]
 name = "pywin32"
-version = "228"
+version = "300"
 description = "Python for Window Extensions"
 category = "main"
 optional = false
@@ -724,7 +724,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
 [[package]]
 name = "regex"
-version = "2020.7.14"
+version = "2021.4.4"
 description = "Alternative regular expression module, to replace re."
 category = "dev"
 optional = false
@@ -732,7 +732,7 @@ python-versions = "*"
 
 [[package]]
 name = "requests"
-version = "2.24.0"
+version = "2.25.1"
 description = "Python HTTP for Humans."
 category = "main"
 optional = false
@@ -740,9 +740,9 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<4"
+chardet = ">=3.0.2,<5"
 idna = ">=2.5,<3"
-urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
+urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
 security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
@@ -750,7 +750,7 @@ socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
 [[package]]
 name = "rlp"
-version = "1.2.0"
+version = "2.0.1"
 description = "A package for Recursive Length Prefix encoding and decoding"
 category = "main"
 optional = false
@@ -760,10 +760,11 @@ python-versions = "*"
 eth-utils = ">=1.0.2,<2"
 
 [package.extras]
-dev = ["bumpversion (>=0.5.3,<1)", "setuptools (>=36.2.0)", "pytest-xdist", "pytest-watch (>=4.1.0,<5)", "wheel", "ipython", "twine", "pytest (==3.3.2)", "tox (>=2.9.1,<3)", "hypothesis (==3.56.5)", "flake8 (==3.4.1)", "Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
+dev = ["Sphinx (>=1.6.5,<2)", "bumpversion (>=0.5.3,<1)", "flake8 (==3.4.1)", "hypothesis (==5.19.0)", "ipython", "pytest-watch (>=4.1.0,<5)", "pytest-xdist", "pytest (==5.4.3)", "setuptools (>=36.2.0)", "sphinx-rtd-theme (>=0.1.9)", "tox (>=2.9.1,<3)", "twine", "wheel"]
 doc = ["Sphinx (>=1.6.5,<2)", "sphinx-rtd-theme (>=0.1.9)"]
 lint = ["flake8 (==3.4.1)"]
-test = ["pytest (==3.3.2)", "tox (>=2.9.1,<3)", "hypothesis (==3.56.5)"]
+rust-backend = ["rusty-rlp (>=0.1.15,<0.2)"]
+test = ["hypothesis (==5.19.0)", "pytest (==5.4.3)", "tox (>=2.9.1,<3)"]
 
 [[package]]
 name = "six"
@@ -777,7 +778,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 name = "snowballstemmer"
 version = "2.1.0"
 description = "This package provides 29 stemmers for 28 languages generated from Snowball algorithms."
-category = "dev"
+category = "main"
 optional = false
 python-versions = "*"
 
@@ -793,7 +794,7 @@ python-versions = ">=3.6"
 name = "sphinx"
 version = "3.5.4"
 description = "Python documentation generator"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -842,11 +843,24 @@ live-dev = ["sphinx-autobuild", "web-compile (>=0.2.1,<0.3.0)"]
 sphinx = ["folium", "numpy", "matplotlib", "ipywidgets", "pandas", "nbclient", "myst-nb (>=0.11.1,<0.12.0)", "sphinx-togglebutton (>=0.2.1)", "sphinx-copybutton", "plotly", "sphinxcontrib-bibtex (>=2.2,<3.0)", "sphinx-thebe", "ablog (>=0.10.13,<0.11.0)", "sphinxext-opengraph"]
 testing = ["myst-nb (>=0.11.1,<0.12.0)", "sphinx-thebe", "coverage", "pytest (>=6.0.1,<6.1.0)", "pytest-cov", "pytest-regressions (>=2.0.1,<2.1.0)"]
 
+[[package]]
+name = "sphinx-click"
+version = "2.7.1"
+description = "Sphinx extension that automatically documents click applications"
+category = "main"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+click = ">=6.0,<8.0"
+docutils = "*"
+sphinx = ">=1.5,<4.0"
+
 [[package]]
 name = "sphinxcontrib-applehelp"
 version = "1.0.2"
 description = "sphinxcontrib-applehelp is a sphinx extension which outputs Apple help books"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -858,7 +872,7 @@ test = ["pytest"]
 name = "sphinxcontrib-devhelp"
 version = "1.0.2"
 description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp document."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -870,7 +884,7 @@ test = ["pytest"]
 name = "sphinxcontrib-htmlhelp"
 version = "1.0.3"
 description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -882,7 +896,7 @@ test = ["pytest", "html5lib"]
 name = "sphinxcontrib-jsmath"
 version = "1.0.1"
 description = "A sphinx extension which renders display math in HTML via JavaScript"
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -893,7 +907,7 @@ test = ["pytest", "flake8", "mypy"]
 name = "sphinxcontrib-qthelp"
 version = "1.0.3"
 description = "sphinxcontrib-qthelp is a sphinx extension which outputs QtHelp document."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -905,7 +919,7 @@ test = ["pytest"]
 name = "sphinxcontrib-serializinghtml"
 version = "1.1.4"
 description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
-category = "dev"
+category = "main"
 optional = false
 python-versions = ">=3.5"
 
@@ -915,23 +929,23 @@ test = ["pytest"]
 
 [[package]]
 name = "toml"
-version = "0.10.1"
+version = "0.10.2"
 description = "Python Library for Tom's Obvious, Minimal Language"
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "toolz"
-version = "0.10.0"
+version = "0.11.1"
 description = "List processing tools and functional utilities"
 category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.5"
 
 [[package]]
 name = "typed-ast"
-version = "1.4.1"
+version = "1.4.3"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
 category = "dev"
 optional = false
@@ -939,7 +953,7 @@ python-versions = "*"
 
 [[package]]
 name = "typing-extensions"
-version = "3.7.4.2"
+version = "3.10.0.0"
 description = "Backported and Experimental Type Hints for Python 3.5+"
 category = "main"
 optional = false
@@ -947,16 +961,16 @@ python-versions = "*"
 
 [[package]]
 name = "urllib3"
-version = "1.25.9"
+version = "1.26.4"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 
 [package.extras]
-brotli = ["brotlipy (>=0.6.0)"]
-secure = ["certifi", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "pyOpenSSL (>=0.14)", "ipaddress"]
+secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
 socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
+brotli = ["brotlipy (>=0.6.0)"]
 
 [[package]]
 name = "varint"
@@ -976,7 +990,7 @@ python-versions = "*"
 
 [[package]]
 name = "web3"
-version = "5.12.0"
+version = "5.12.2"
 description = "Web3.py"
 category = "main"
 optional = false
@@ -984,10 +998,10 @@ python-versions = ">=3.6,<4"
 
 [package.dependencies]
 eth-abi = ">=2.0.0b6,<3.0.0"
-eth-account = ">=0.5.2,<0.6.0"
+eth-account = ">=0.5.3,<0.6.0"
 eth-hash = {version = ">=0.2.0,<1.0.0", extras = ["pycryptodome"]}
 eth-typing = ">=2.0.0,<3.0.0"
-eth-utils = ">=1.8.4,<2.0.0"
+eth-utils = ">=1.9.5,<2.0.0"
 hexbytes = ">=0.1.0,<1.0.0"
 ipfshttpclient = ">=0.4.13,<1"
 jsonschema = ">=3.2.0,<4.0.0"
@@ -999,10 +1013,10 @@ typing-extensions = {version = ">=3.7.4.1,<4", markers = "python_version < \"3.8
 websockets = ">=8.1.0,<9.0.0"
 
 [package.extras]
-dev = ["eth-tester[py-evm] (==v0.5.0-beta.1)", "py-geth (>=2.2.0,<3)", "flake8 (==3.4.1)", "isort (>=4.2.15,<4.3.5)", "mypy (==0.730)", "mock", "sphinx-better-theme (>=0.1.4)", "click (>=5.1)", "configparser (==3.5.0)", "contextlib2 (>=0.5.4)", "py-solc (>=0.4.0)", "pytest (>=4.4.0,<5.0.0)", "sphinx (>=2.4.4,<3)", "sphinx-rtd-theme (>=0.1.9)", "toposort (>=1.4)", "towncrier (>=19.2.0,<20)", "urllib3", "web3 (>=2.1.0)", "wheel", "bumpversion", "flaky (>=3.3.0)", "hypothesis (>=3.31.2)", "pytest-asyncio (>=0.10.0,<0.11)", "pytest-mock (>=1.10,<2)", "pytest-pythonpath (>=0.3)", "pytest-watch (>=4.2,<5)", "pytest-xdist (>=1.29,<2)", "setuptools (>=36.2.0)", "tox (>=1.8.0)", "tqdm (>4.32,<5)", "twine (>=1.13,<2)", "when-changed (>=0.3.0,<0.4)"]
-docs = ["mock", "sphinx-better-theme (>=0.1.4)", "click (>=5.1)", "configparser (==3.5.0)", "contextlib2 (>=0.5.4)", "py-geth (>=2.2.0,<3)", "py-solc (>=0.4.0)", "pytest (>=4.4.0,<5.0.0)", "sphinx (>=2.4.4,<3)", "sphinx-rtd-theme (>=0.1.9)", "toposort (>=1.4)", "towncrier (>=19.2.0,<20)", "urllib3", "web3 (>=2.1.0)", "wheel"]
+dev = ["eth-tester[py-evm] (==v0.5.0-beta.2)", "py-geth (>=2.4.0,<3)", "flake8 (==3.4.1)", "isort (>=4.2.15,<4.3.5)", "mypy (==0.730)", "mock", "sphinx-better-theme (>=0.1.4)", "click (>=5.1)", "configparser (==3.5.0)", "contextlib2 (>=0.5.4)", "py-solc (>=0.4.0)", "pytest (>=4.4.0,<5.0.0)", "sphinx (>=2.4.4,<3)", "sphinx-rtd-theme (>=0.1.9)", "toposort (>=1.4)", "towncrier (>=19.2.0,<20)", "urllib3", "web3 (>=2.1.0)", "wheel", "bumpversion", "flaky (>=3.3.0)", "hypothesis (>=3.31.2)", "pytest-asyncio (>=0.10.0,<0.11)", "pytest-mock (>=1.10,<2)", "pytest-pythonpath (>=0.3)", "pytest-watch (>=4.2,<5)", "pytest-xdist (>=1.29,<2)", "setuptools (>=36.2.0)", "tox (>=1.8.0)", "tqdm (>4.32,<5)", "twine (>=1.13,<2)", "when-changed (>=0.3.0,<0.4)"]
+docs = ["mock", "sphinx-better-theme (>=0.1.4)", "click (>=5.1)", "configparser (==3.5.0)", "contextlib2 (>=0.5.4)", "py-geth (>=2.4.0,<3)", "py-solc (>=0.4.0)", "pytest (>=4.4.0,<5.0.0)", "sphinx (>=2.4.4,<3)", "sphinx-rtd-theme (>=0.1.9)", "toposort (>=1.4)", "towncrier (>=19.2.0,<20)", "urllib3", "web3 (>=2.1.0)", "wheel"]
 linter = ["flake8 (==3.4.1)", "isort (>=4.2.15,<4.3.5)", "mypy (==0.730)"]
-tester = ["eth-tester[py-evm] (==v0.5.0-beta.1)", "py-geth (>=2.2.0,<3)"]
+tester = ["eth-tester[py-evm] (==v0.5.0-beta.2)", "py-geth (>=2.4.0,<3)"]
 
 [[package]]
 name = "websockets"
@@ -1014,20 +1028,20 @@ python-versions = ">=3.6.1"
 
 [[package]]
 name = "zipp"
-version = "3.1.0"
+version = "3.4.1"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "main"
 optional = false
 python-versions = ">=3.6"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["jaraco.itertools", "func-timeout"]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.7"
-content-hash = "c4fe8d9b4ff0cb6379463e03935b610f34b3a9cbaa0990b800b387bab52c2162"
+content-hash = "b202a29f1e28fb516ec650b796e48b3cd6add783942d3cd63aff69fcb683156a"
 
 [metadata.files]
 alabaster = [
@@ -1043,16 +1057,16 @@ atomicwrites = [
     {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
 ]
 attrs = [
-    {file = "attrs-19.3.0-py2.py3-none-any.whl", hash = "sha256:08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c"},
-    {file = "attrs-19.3.0.tar.gz", hash = "sha256:f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"},
+    {file = "attrs-20.3.0-py2.py3-none-any.whl", hash = "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6"},
+    {file = "attrs-20.3.0.tar.gz", hash = "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"},
 ]
 babel = [
     {file = "Babel-2.9.1-py2.py3-none-any.whl", hash = "sha256:ab49e12b91d937cd11f0b67cb259a57ab4ad2b59ac7a3b41d6c06c0ac5b0def9"},
     {file = "Babel-2.9.1.tar.gz", hash = "sha256:bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0"},
 ]
 base58 = [
-    {file = "base58-2.0.1-py3-none-any.whl", hash = "sha256:447adc750d6b642987ffc6d397ecd15a799852d5f6a1d308d384500243825058"},
-    {file = "base58-2.0.1.tar.gz", hash = "sha256:365c9561d9babac1b5f18ee797508cd54937a724b6e419a130abad69cec5ca79"},
+    {file = "base58-2.1.0-py3-none-any.whl", hash = "sha256:8225891d501b68c843ffe30b86371f844a21c6ba00da76f52f9b998ba771fb48"},
+    {file = "base58-2.1.0.tar.gz", hash = "sha256:171a547b4a3c61e1ae3807224a6f7aec75e364c4395e7562649d7335768001a2"},
 ]
 beautifulsoup4 = [
     {file = "beautifulsoup4-4.9.3-py2-none-any.whl", hash = "sha256:4c98143716ef1cb40bf7f39a8e3eec8f8b009509e74904ba3a7b315431577e35"},
@@ -1067,59 +1081,77 @@ black = [
     {file = "black-19.10b0.tar.gz", hash = "sha256:c2edb73a08e9e0e6f65a0e6af18b059b8b1cdd5bef997d7a0b181df93dc81539"},
 ]
 certifi = [
-    {file = "certifi-2020.6.20-py2.py3-none-any.whl", hash = "sha256:8fc0819f1f30ba15bdb34cceffb9ef04d99f420f68eb75d901e9560b8749fc41"},
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 urllib3 = [
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@@ -1581,8 +1633,8 @@ wcwidth = [
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+    {file = "web3-5.12.2-py3-none-any.whl", hash = "sha256:be8e36b69c475055110ed7fde33c4197f3465410abe6843d3f8109c50ac5b0f7"},
+    {file = "web3-5.12.2.tar.gz", hash = "sha256:94b3e6dc1ce7e921322ffa188960c6853f276060b0741a738fe7ba407b4cf063"},
 ]
 websockets = [
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@@ -1609,6 +1661,6 @@ websockets = [
     {file = "websockets-8.1.tar.gz", hash = "sha256:5c65d2da8c6bce0fca2528f69f44b2f977e06954c8512a952222cea50dad430f"},
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 zipp = [
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+    {file = "zipp-3.4.1.tar.gz", hash = "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index 21a3ad6..ad89743 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,9 +19,14 @@ classifiers = [
 ]
 
 
+[tool.poetry.scripts]
+unipy = "uniswap:main"
+
 [tool.poetry.dependencies]
 python = "^3.7"
 web3 = "^5.12.0"
+click = "^7.1.2"
+sphinx-click = "^2.7.1"
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.4.3"
diff --git a/tests/test_cli.py b/tests/test_cli.py
new file mode 100644
index 0000000..a830b7e
--- /dev/null
+++ b/tests/test_cli.py
@@ -0,0 +1,35 @@
+import json
+
+from click.testing import CliRunner
+
+from uniswap.cli import main
+
+
+def test_get_price():
+    runner = CliRunner()
+    result = runner.invoke(main, ["price", "weth", "dai"])
+    assert result.exit_code == 0
+
+    # Will break when ETH breaks 10k
+    assert 1000 < float(result.output) < 10_000
+
+    result = runner.invoke(main, ["price", "wbtc", "dai"])
+    assert result.exit_code == 0
+
+    # Will break when BTC breaks 100k
+    assert 10_000 < float(result.output) < 100_000
+
+
+def test_get_token():
+    runner = CliRunner()
+    result = runner.invoke(main, ["token", "weth"])
+    assert result.exit_code == 0
+    out = json.loads(result.output.replace("'", '"'))
+    assert out["symbol"] == "WETH"
+    assert out["decimals"] == 18
+
+
+def test_get_tokendb():
+    runner = CliRunner()
+    result = runner.invoke(main, ["tokendb", "--metadata"])
+    assert result.exit_code == 0
diff --git a/uniswap/__init__.py b/uniswap/__init__.py
index 6373a44..42f0567 100644
--- a/uniswap/__init__.py
+++ b/uniswap/__init__.py
@@ -1 +1,2 @@
 from .uniswap import Uniswap, InvalidToken, InsufficientBalance
+from .cli import main
diff --git a/uniswap/assets/erc20.abi b/uniswap/assets/erc20.abi
index b399874..4c2bf73 100644
--- a/uniswap/assets/erc20.abi
+++ b/uniswap/assets/erc20.abi
@@ -1,221 +1,263 @@
 [
-	{
-		"constant": false,
-		"inputs": [
-			{
-				"name": "spender",
-				"type": "address"
-			},
-			{
-				"name": "value",
-				"type": "uint256"
-			}
-		],
-		"name": "approve",
-		"outputs": [
-			{
-				"name": "",
-				"type": "bool"
-			}
-		],
-		"payable": false,
-		"stateMutability": "nonpayable",
-		"type": "function"
-	},
-	{
-		"constant": true,
-		"inputs": [],
-		"name": "totalSupply",
-		"outputs": [
-			{
-				"name": "",
-				"type": "uint256"
-			}
-		],
-		"payable": false,
-		"stateMutability": "view",
-		"type": "function"
-	},
-	{
-		"constant": false,
-		"inputs": [
-			{
-				"name": "from",
-				"type": "address"
-			},
-			{
-				"name": "to",
-				"type": "address"
-			},
-			{
-				"name": "value",
-				"type": "uint256"
-			}
-		],
-		"name": "transferFrom",
-		"outputs": [
-			{
-				"name": "",
-				"type": "bool"
-			}
-		],
-		"payable": false,
-		"stateMutability": "nonpayable",
-		"type": "function"
-	},
-	{
-		"constant": false,
-		"inputs": [
-			{
-				"name": "spender",
-				"type": "address"
-			},
-			{
-				"name": "addedValue",
-				"type": "uint256"
-			}
-		],
-		"name": "increaseAllowance",
-		"outputs": [
-			{
-				"name": "",
-				"type": "bool"
-			}
-		],
-		"payable": false,
-		"stateMutability": "nonpayable",
-		"type": "function"
-	},
-	{
-		"constant": true,
-		"inputs": [
-			{
-				"name": "owner",
-				"type": "address"
-			}
-		],
-		"name": "balanceOf",
-		"outputs": [
-			{
-				"name": "",
-				"type": "uint256"
-			}
-		],
-		"payable": false,
-		"stateMutability": "view",
-		"type": "function"
-	},
-	{
-		"constant": false,
-		"inputs": [
-			{
-				"name": "spender",
-				"type": "address"
-			},
-			{
-				"name": "subtractedValue",
-				"type": "uint256"
-			}
-		],
-		"name": "decreaseAllowance",
-		"outputs": [
-			{
-				"name": "",
-				"type": "bool"
-			}
-		],
-		"payable": false,
-		"stateMutability": "nonpayable",
-		"type": "function"
-	},
-	{
-		"constant": false,
-		"inputs": [
-			{
-				"name": "to",
-				"type": "address"
-			},
-			{
-				"name": "value",
-				"type": "uint256"
-			}
-		],
-		"name": "transfer",
-		"outputs": [
-			{
-				"name": "",
-				"type": "bool"
-			}
-		],
-		"payable": false,
-		"stateMutability": "nonpayable",
-		"type": "function"
-	},
-	{
-		"constant": true,
-		"inputs": [
-			{
-				"name": "owner",
-				"type": "address"
-			},
-			{
-				"name": "spender",
-				"type": "address"
-			}
-		],
-		"name": "allowance",
-		"outputs": [
-			{
-				"name": "",
-				"type": "uint256"
-			}
-		],
-		"payable": false,
-		"stateMutability": "view",
-		"type": "function"
-	},
-	{
-		"anonymous": false,
-		"inputs": [
-			{
-				"indexed": true,
-				"name": "from",
-				"type": "address"
-			},
-			{
-				"indexed": true,
-				"name": "to",
-				"type": "address"
-			},
-			{
-				"indexed": false,
-				"name": "value",
-				"type": "uint256"
-			}
-		],
-		"name": "Transfer",
-		"type": "event"
-	},
-	{
-		"anonymous": false,
-		"inputs": [
-			{
-				"indexed": true,
-				"name": "owner",
-				"type": "address"
-			},
-			{
-				"indexed": true,
-				"name": "spender",
-				"type": "address"
-			},
-			{
-				"indexed": false,
-				"name": "value",
-				"type": "uint256"
-			}
-		],
-		"name": "Approval",
-		"type": "event"
-	}
-]
\ No newline at end of file
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "name",
+    "outputs": [
+      {
+        "name": "",
+        "type": "string"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "symbol",
+    "outputs": [
+      {
+        "name": "",
+        "type": "string"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "decimals",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint8"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "approve",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [],
+    "name": "totalSupply",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "from",
+        "type": "address"
+      },
+      {
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "transferFrom",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "name": "addedValue",
+        "type": "uint256"
+      }
+    ],
+    "name": "increaseAllowance",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "name": "owner",
+        "type": "address"
+      }
+    ],
+    "name": "balanceOf",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "name": "subtractedValue",
+        "type": "uint256"
+      }
+    ],
+    "name": "decreaseAllowance",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": false,
+    "inputs": [
+      {
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "transfer",
+    "outputs": [
+      {
+        "name": "",
+        "type": "bool"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "constant": true,
+    "inputs": [
+      {
+        "name": "owner",
+        "type": "address"
+      },
+      {
+        "name": "spender",
+        "type": "address"
+      }
+    ],
+    "name": "allowance",
+    "outputs": [
+      {
+        "name": "",
+        "type": "uint256"
+      }
+    ],
+    "payable": false,
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "name": "from",
+        "type": "address"
+      },
+      {
+        "indexed": true,
+        "name": "to",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "Transfer",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      {
+        "indexed": true,
+        "name": "owner",
+        "type": "address"
+      },
+      {
+        "indexed": true,
+        "name": "spender",
+        "type": "address"
+      },
+      {
+        "indexed": false,
+        "name": "value",
+        "type": "uint256"
+      }
+    ],
+    "name": "Approval",
+    "type": "event"
+  }
+]
diff --git a/uniswap/cli.py b/uniswap/cli.py
new file mode 100644
index 0000000..b94be02
--- /dev/null
+++ b/uniswap/cli.py
@@ -0,0 +1,97 @@
+import logging
+
+import click
+from dotenv import load_dotenv
+from web3 import Web3
+
+from .uniswap import Uniswap, AddressLike, _str_to_addr
+from .tokens import tokens
+
+
+logger = logging.getLogger(__name__)
+
+
+def _coerce_to_checksum(addr: str) -> str:
+    if not addr.startswith("0x"):
+        if addr.upper() in tokens:
+            return tokens[addr.upper()]
+        else:
+            raise ValueError(
+                "token was not an address, and a shorthand was not found in the token db"
+            )
+    if Web3.isChecksumAddress(addr):
+        return addr
+    else:
+        # logger.warning("Address wasn't in checksum format, coercing")
+        return Web3.toChecksumAddress(addr)  # type: ignore
+
+
+@click.group()
+@click.option("-v", "--verbose", is_flag=True)
+@click.option("--version", type=click.Choice(["1", "2"]), default="2")
+@click.pass_context
+def main(ctx: click.Context, verbose: bool, version: str) -> None:
+    logging.basicConfig(level=logging.INFO if verbose else logging.WARNING)
+    load_dotenv()
+
+    ctx.ensure_object(dict)
+    ctx.obj["VERBOSE"] = verbose
+    ctx.obj["UNISWAP"] = Uniswap(None, None, version=int(version))
+
+
+@main.command()
+@click.argument("token_in", type=_coerce_to_checksum)
+@click.argument("token_out", type=_coerce_to_checksum)
+@click.option(
+    "--raw",
+    is_flag=True,
+    help="Don't normalize the quoted price to the output token's decimals",
+)
+@click.option(
+    "--quantity",
+    help="Quantity of output tokens to get price of. Falls back to one full unit of the input token by default (10**18 for WETH, for example).",
+)
+@click.pass_context
+def price(
+    ctx: click.Context,
+    token_in: AddressLike,
+    token_out: AddressLike,
+    raw: bool,
+    quantity: int = None,
+) -> None:
+    """Returns the price of ``quantity`` tokens of ``token_in`` quoted in ``token_out``."""
+    uni = ctx.obj["UNISWAP"]
+    if quantity is None:
+        quantity = 10 ** uni.get_token(token_in)["decimals"]
+    price = uni.get_token_token_input_price(token_in, token_out, qty=quantity)
+    if raw:
+        print(price)
+    else:
+        decimals = uni.get_token(token_out)["decimals"]
+        print(price / 10 ** decimals)
+
+
+@main.command()
+@click.argument("token", type=_coerce_to_checksum)
+@click.pass_context
+def token(ctx: click.Context, token: AddressLike) -> None:
+    """Show metadata for token"""
+    uni = ctx.obj["UNISWAP"]
+    t1 = uni.get_token(token)
+    print(t1)
+
+
+@main.command()
+@click.option("--metadata", is_flag=True, help="Also get metadata for tokens")
+@click.pass_context
+def tokendb(ctx: click.Context, metadata: bool) -> None:
+    """List known token addresses"""
+    uni = ctx.obj["UNISWAP"]
+    for symbol, addr in tokens.items():
+        if metadata:
+            data = uni.get_token(_str_to_addr(addr))
+            data["address"] = addr
+            assert data["symbol"].lower() == symbol.lower()
+            print(data)
+        else:
+            print({"symbol": symbol, "address": addr})
diff --git a/uniswap/tokens.py b/uniswap/tokens.py
new file mode 100644
index 0000000..e51d0ba
--- /dev/null
+++ b/uniswap/tokens.py
@@ -0,0 +1,7 @@
+tokens = {
+    "WETH": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
+    "DAI": "0x6B175474E89094C44Da98b954EedeAC495271d0F",
+    "BAT": "0x0D8775F648430679A709E98d2b0Cb6250d2887EF",
+    "WBTC": "0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599",
+    "UNI": "0x1f9840a85d5aF5bf1D1762F925BDADdC4201F984",
+}
diff --git a/uniswap/uniswap.py b/uniswap/uniswap.py
index cc7cdcf..c6fa6b0 100644
--- a/uniswap/uniswap.py
+++ b/uniswap/uniswap.py
@@ -80,6 +80,14 @@ def approved(self: Any, *args: Any, **kwargs: Any) -> Any:
 
 def supports(versions: List[int]) -> Callable:
     def g(f: Callable) -> Callable:
+        if f.__doc__ is None:
+            f.__doc__ = ""
+        f.__doc__ += """\n\n
+        Supports Uniswap
+        """ + ", ".join(
+            "v" + str(ver) for ver in versions
+        )
+
         @functools.wraps(f)
         def check_version(self: "Uniswap", *args: List, **kwargs: Dict) -> Any:
             if self.version not in versions:
@@ -160,8 +168,8 @@ class Uniswap:
 
     def __init__(
         self,
-        address: Union[str, AddressLike],
-        private_key: str,
+        address: Union[str, AddressLike, None],
+        private_key: Optional[str],
         provider: str = None,
         web3: Web3 = None,
         version: int = 1,
@@ -179,10 +187,21 @@ def __init__(
         :param factory_contract_addr: Can be optionally set to override the address of the factory contract.
         :param router_contract_addr: Can be optionally set to override the address of the router contract (v2 only).
         """
-        self.address: AddressLike = _str_to_addr(address) if isinstance(
-            address, str
-        ) else address
-        self.private_key = private_key
+        if address is None:
+            self.address: AddressLike = _str_to_addr(
+                "0x0000000000000000000000000000000000000000"
+            )
+        else:
+            self.address = (
+                _str_to_addr(address) if isinstance(address, str) else address
+            )
+        if private_key is None:
+            self.private_key = (
+                "0x0000000000000000000000000000000000000000000000000000000000000000"
+            )
+        else:
+            self.private_key = private_key
+
         self.version = version
 
         # TODO: Write tests for slippage
@@ -246,7 +265,12 @@ def __init__(
 
     @supports([1])
     def get_all_tokens(self) -> List[dict]:
-        # FIXME: This is a very expensive operation, would benefit greatly from caching
+        """
+        Retrieves all token pairs.
+
+        Note: This is a *very* expensive operation and might therefore not work properly.
+        """
+        # FIXME: This is a very expensive operation, would benefit greatly from caching.
         tokenCount = self.factory_contract.functions.tokenCount().call()
         tokens = []
         for i in range(tokenCount):
@@ -258,20 +282,23 @@ def get_all_tokens(self) -> List[dict]:
             tokens.append(token)
         return tokens
 
-    @supports([1])
     def get_token(self, address: AddressLike) -> dict:
+        """
+        Retrieves metadata from the ERC20 contract of a given token, like its name, symbol, and decimals.
+        """
         # FIXME: This function should always return the same output for the same input
         #        and would therefore benefit from caching
         token_contract = self._load_contract(abi_name="erc20", address=address)
         try:
-            symbol = token_contract.functions.symbol().call()
             name = token_contract.functions.name().call()
+            symbol = token_contract.functions.symbol().call()
+            decimals = token_contract.functions.decimals().call()
         except Exception as e:
             logger.warning(
                 f"Exception occurred while trying to get token {_addr_to_str(address)}: {e}"
             )
             raise InvalidToken(address)
-        return {"name": name, "symbol": symbol}
+        return {"name": name, "symbol": symbol, "decimals": decimals}
 
     @supports([1])
     def exchange_address_from_token(self, token_addr: AddressLike) -> AddressLike: