Repository: crypto-org-chain/chainlibpy (language: python)

Issue:
Problem: missing test environment
A blockchain could be started locally to test this library


Discussion / hints:

Fix patch:
diff --git a/.gitignore b/.gitignore
index 363409e..2b767f2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -110,4 +110,7 @@ venv.bak/
 tester.py
 
 # vscode
-.vscode/
\ No newline at end of file
+.vscode/
+
+# crypto.org chain binary
+chain-maind
\ No newline at end of file
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0143ced..efa66d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,9 +2,11 @@
 
 This log documents all public API breaking backwards incompatible changes.
 
-## 2.2.0
+## 2.2.0 - to be released
 
-[#25](https://github.com/crypto-org-chain/chainlibpy/issues/25) Add mainnet and testnet-croeseid-4 network configurations
+[#32](https://github.com/crypto-org-chain/chainlibpy/issues/32) Add test environment\
+Require Python >= 3.8\
+[#25](https://github.com/crypto-org-chain/chainlibpy/issues/25) Add mainnet and testnet-croeseid-4 network configurations\
 [#24](https://github.com/crypto-org-chain/chainlibpy/pull/24) Fix unable to use secure gRPC channel to interact with chain
 
 *Dec 7, 2021*
diff --git a/README.md b/README.md
index 2794c78..0c67da4 100644
--- a/README.md
+++ b/README.md
@@ -125,13 +125,13 @@ $COSMOS_SDK_DIR/proto/cosmos/auth/v1beta1/auth.proto
 ### Tox<a name="tox"></a>
 
 ```
-pyenv local 3.7.a 3.8.b 3.9.c
+pyenv local 3.8.a 3.9.b
 ```
 
-`a`, `b` and `c` is python versions installed on your computer by `pyenv`. More about [pyenv](https://github.com/pyenv/pyenv).
+`a` and `b` are python versions installed on your computer by `pyenv`. More about [pyenv](https://github.com/pyenv/pyenv).
 
-After this command, a `.python-version` file will be generated at project root directory, which means python versions inside `.python-version` are presented for this project. So running `tox` command with `py{37,38,39}` configuration should succeed.\
-Then run to verify. This command is recommended to run before pushing a commit.
+After this command, a `.python-version` file will be generated at project root directory, which means python versions inside `.python-version` are presented for this project. So running `tox` command with `py{38,39}` configuration should succeed.\
+Then run to verify. Command below is recommended to run before pushing a commit.
 
 ```sh
 poetry run tox
diff --git a/poetry.lock b/poetry.lock
index a53c1c0..2c3d3d7 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -2,38 +2,23 @@
 name = "atomicwrites"
 version = "1.4.0"
 description = "Atomic file writes."
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "attrs"
-version = "21.2.0"
+version = "21.4.0"
 description = "Classes Without Boilerplate"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.extras]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit", "cloudpickle"]
 docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
-tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface"]
-tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins"]
-
-[[package]]
-name = "backports.entry-points-selectable"
-version = "1.1.1"
-description = "Compatibility shim providing selectable entry points for older implementations"
-category = "dev"
-optional = false
-python-versions = ">=2.7"
-
-[package.dependencies]
-importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
-
-[package.extras]
-docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
-testing = ["pytest", "pytest-flake8", "pytest-cov", "pytest-black (>=0.3.7)", "pytest-mypy", "pytest-checkdocs (>=2.4)", "pytest-enabler (>=1.0.1)"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "cloudpickle"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "cloudpickle"]
 
 [[package]]
 name = "bech32"
@@ -45,7 +30,7 @@ python-versions = "*"
 
 [[package]]
 name = "black"
-version = "21.11b1"
+version = "21.12b0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
@@ -56,9 +41,7 @@ click = ">=7.1.2"
 mypy-extensions = ">=0.4.3"
 pathspec = ">=0.9.0,<1"
 platformdirs = ">=2"
-regex = ">=2021.4.4"
 tomli = ">=0.2.6,<2.0.0"
-typed-ast = {version = ">=1.4.2", markers = "python_version < \"3.8\" and implementation_name == \"cpython\""}
 typing-extensions = [
     {version = ">=3.10.0.0", markers = "python_version < \"3.10\""},
     {version = "!=3.10.0.1", markers = "python_version >= \"3.10\""},
@@ -71,6 +54,25 @@ jupyter = ["ipython (>=7.8.0)", "tokenize-rt (>=3.2.0)"]
 python2 = ["typed-ast (>=1.4.3)"]
 uvloop = ["uvloop (>=0.15.2)"]
 
+[[package]]
+name = "certifi"
+version = "2021.10.8"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "charset-normalizer"
+version = "2.0.10"
+description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
+category = "dev"
+optional = false
+python-versions = ">=3.5.0"
+
+[package.extras]
+unicode_backport = ["unicodedata2"]
+
 [[package]]
 name = "click"
 version = "8.0.3"
@@ -81,19 +83,18 @@ python-versions = ">=3.6"
 
 [package.dependencies]
 colorama = {version = "*", markers = "platform_system == \"Windows\""}
-importlib-metadata = {version = "*", markers = "python_version < \"3.8\""}
 
 [[package]]
 name = "colorama"
 version = "0.4.4"
 description = "Cross-platform colored terminal text."
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "distlib"
-version = "0.3.3"
+version = "0.3.4"
 description = "Distribution utilities"
 category = "dev"
 optional = false
@@ -110,6 +111,32 @@ python-versions = "*"
 [package.dependencies]
 untokenize = "*"
 
+[[package]]
+name = "docker"
+version = "4.4.4"
+description = "A Python library for the Docker Engine API."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+pywin32 = {version = "227", markers = "sys_platform == \"win32\""}
+requests = ">=2.14.2,<2.18.0 || >2.18.0"
+six = ">=1.4.0"
+websocket-client = ">=0.32.0"
+
+[package.extras]
+ssh = ["paramiko (>=2.4.2)"]
+tls = ["pyOpenSSL (>=17.5.0)", "cryptography (>=1.3.4)", "idna (>=2.0.0)"]
+
+[[package]]
+name = "durations"
+version = "0.3.3"
+description = "UNKNOWN"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "ecdsa"
 version = "0.16.1"
@@ -127,16 +154,28 @@ gmpy2 = ["gmpy2"]
 
 [[package]]
 name = "filelock"
-version = "3.4.0"
+version = "3.4.2"
 description = "A platform independent file lock."
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.extras]
 docs = ["furo (>=2021.8.17b43)", "sphinx (>=4.1)", "sphinx-autodoc-typehints (>=1.12)"]
 testing = ["covdefaults (>=1.2.0)", "coverage (>=4)", "pytest (>=4)", "pytest-cov", "pytest-timeout (>=1.4.2)"]
 
+[[package]]
+name = "fire"
+version = "0.4.0"
+description = "A library for automatically generating command line interfaces."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+six = "*"
+termcolor = "*"
+
 [[package]]
 name = "flake8"
 version = "4.0.1"
@@ -146,14 +185,13 @@ optional = false
 python-versions = ">=3.6"
 
 [package.dependencies]
-importlib-metadata = {version = "<4.3", markers = "python_version < \"3.8\""}
 mccabe = ">=0.6.0,<0.7.0"
 pycodestyle = ">=2.8.0,<2.9.0"
 pyflakes = ">=2.4.0,<2.5.0"
 
 [[package]]
 name = "grpcio"
-version = "1.42.0"
+version = "1.43.0"
 description = "HTTP/2-based RPC framework"
 category = "main"
 optional = false
@@ -163,18 +201,18 @@ python-versions = ">=3.6"
 six = ">=1.5.2"
 
 [package.extras]
-protobuf = ["grpcio-tools (>=1.42.0)"]
+protobuf = ["grpcio-tools (>=1.43.0)"]
 
 [[package]]
 name = "grpcio-tools"
-version = "1.42.0"
+version = "1.43.0"
 description = "Protobuf code generator for gRPC"
 category = "main"
 optional = false
 python-versions = ">=3.6"
 
 [package.dependencies]
-grpcio = ">=1.42.0"
+grpcio = ">=1.43.0"
 protobuf = ">=3.5.0.post1,<4.0dev"
 
 [[package]]
@@ -188,27 +226,50 @@ python-versions = ">=3.6"
 [package.dependencies]
 ecdsa = ">=0.14.0"
 
+[[package]]
+name = "idna"
+version = "3.3"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "dev"
+optional = false
+python-versions = ">=3.5"
+
 [[package]]
 name = "importlib-metadata"
-version = "4.2.0"
+version = "4.10.0"
 description = "Read metadata from Python packages"
-category = "main"
+category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.dependencies]
-typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
 zipp = ">=0.5"
 
 [package.extras]
 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)"]
+perf = ["ipython"]
+testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "packaging", "pyfakefs", "flufl.flake8", "pytest-perf (>=0.9.2)", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
+
+[[package]]
+name = "importlib-resources"
+version = "5.4.0"
+description = "Read resources from Python packages"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+zipp = {version = ">=3.1.0", markers = "python_version < \"3.10\""}
+
+[package.extras]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
 [[package]]
 name = "iniconfig"
 version = "1.1.1"
 description = "iniconfig: brain-dead simple config-ini parsing"
-category = "main"
+category = "dev"
 optional = false
 python-versions = "*"
 
@@ -226,9 +287,37 @@ requirements_deprecated_finder = ["pipreqs", "pip-api"]
 colors = ["colorama (>=0.4.3,<0.5.0)"]
 plugins = ["setuptools"]
 
+[[package]]
+name = "jsonmerge"
+version = "1.8.0"
+description = "Merge a series of JSON documents."
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+jsonschema = "*"
+
+[[package]]
+name = "jsonschema"
+version = "4.4.0"
+description = "An implementation of JSON Schema validation for Python"
+category = "dev"
+optional = false
+python-versions = ">=3.7"
+
+[package.dependencies]
+attrs = ">=17.4.0"
+importlib-resources = {version = ">=1.4.0", markers = "python_version < \"3.9\""}
+pyrsistent = ">=0.14.0,<0.17.0 || >0.17.0,<0.17.1 || >0.17.1,<0.17.2 || >0.17.2"
+
+[package.extras]
+format = ["fqdn", "idna", "isoduration", "jsonpointer (>1.13)", "rfc3339-validator", "rfc3987", "uri-template", "webcolors (>=1.11)"]
+format_nongpl = ["fqdn", "idna", "isoduration", "jsonpointer (>1.13)", "rfc3339-validator", "rfc3986-validator (>0.1.0)", "uri-template", "webcolors (>=1.11)"]
+
 [[package]]
 name = "markdown-it-py"
-version = "1.1.0"
+version = "2.0.0"
 description = "Python port of markdown-it. Markdown parsing, done right!"
 category = "dev"
 optional = false
@@ -236,15 +325,16 @@ python-versions = "~=3.6"
 
 [package.dependencies]
 attrs = ">=19,<22"
-typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
+mdurl = ">=0.1,<1.0"
 
 [package.extras]
+benchmarking = ["psutil", "pytest", "pytest-benchmark (>=3.2,<4.0)"]
 code_style = ["pre-commit (==2.6)"]
 compare = ["commonmark (>=0.9.1,<0.10.0)", "markdown (>=3.2.2,<3.3.0)", "mistletoe-ebp (>=0.10.0,<0.11.0)", "mistune (>=0.8.4,<0.9.0)", "panflute (>=1.12,<2.0)"]
 linkify = ["linkify-it-py (>=1.0,<2.0)"]
 plugins = ["mdit-py-plugins"]
 rtd = ["myst-nb (==0.13.0a1)", "pyyaml", "sphinx (>=2,<4)", "sphinx-copybutton", "sphinx-panels (>=0.4.0,<0.5.0)", "sphinx-book-theme"]
-testing = ["coverage", "psutil", "pytest (>=3.6,<4)", "pytest-benchmark (>=3.2,<4.0)", "pytest-cov", "pytest-regressions"]
+testing = ["coverage", "pytest", "pytest-cov", "pytest-regressions"]
 
 [[package]]
 name = "mccabe"
@@ -256,7 +346,7 @@ python-versions = "*"
 
 [[package]]
 name = "mdformat"
-version = "0.7.10"
+version = "0.7.13"
 description = "CommonMark compliant Markdown formatter"
 category = "dev"
 optional = false
@@ -264,9 +354,8 @@ python-versions = ">=3.7,<4.0"
 
 [package.dependencies]
 importlib-metadata = {version = ">=3.6.0", markers = "python_version < \"3.10\""}
-markdown-it-py = ">=1.0.0b2,<2.0.0"
+markdown-it-py = ">=1.0.0b2,<3.0.0"
 tomli = ">=1.1.0"
-typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 
 [[package]]
 name = "mdformat-black"
@@ -291,6 +380,14 @@ python-versions = ">=3.7,<4.0"
 [package.dependencies]
 mdformat = ">=0.7.1,<0.8.0"
 
+[[package]]
+name = "mdurl"
+version = "0.1.0"
+description = "Markdown URL utilities"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
 [[package]]
 name = "mnemonic"
 version = "0.19"
@@ -299,6 +396,17 @@ category = "main"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "multitail2"
+version = "1.5.2"
+description = "Enables following multiple files for new lines at once, automatically handling file creation/deletion/rotation"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.dependencies]
+six = "*"
+
 [[package]]
 name = "mypy-extensions"
 version = "0.4.3"
@@ -311,7 +419,7 @@ python-versions = "*"
 name = "packaging"
 version = "21.3"
 description = "Core utilities for Python packages"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 
@@ -328,11 +436,11 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 
 [[package]]
 name = "platformdirs"
-version = "2.4.0"
+version = "2.4.1"
 description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.extras]
 docs = ["Sphinx (>=4)", "furo (>=2021.7.5b38)", "proselint (>=0.10.2)", "sphinx-autodoc-typehints (>=1.12)"]
@@ -342,20 +450,17 @@ test = ["appdirs (==1.4.4)", "pytest (>=6)", "pytest-cov (>=2.7)", "pytest-mock
 name = "pluggy"
 version = "1.0.0"
 description = "plugin and hook calling mechanisms for python"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 
-[package.dependencies]
-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
-
 [package.extras]
 dev = ["pre-commit", "tox"]
 testing = ["pytest", "pytest-benchmark"]
 
 [[package]]
 name = "protobuf"
-version = "3.19.1"
+version = "3.19.3"
 description = "Protocol Buffers"
 category = "main"
 optional = false
@@ -365,7 +470,7 @@ python-versions = ">=3.5"
 name = "py"
 version = "1.11.0"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
@@ -389,18 +494,47 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 name = "pyparsing"
 version = "3.0.6"
 description = "Python parsing module"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 
 [package.extras]
 diagrams = ["jinja2", "railroad-diagrams"]
 
+[[package]]
+name = "pyrsistent"
+version = "0.18.0"
+description = "Persistent/Functional/Immutable data structures"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[[package]]
+name = "pystarport"
+version = "0.2.3"
+description = "Spawn local devnets for cosmos-sdk chains"
+category = "dev"
+optional = false
+python-versions = ">=3.8,<4.0"
+
+[package.dependencies]
+bech32 = ">=1.1.0,<2.0.0"
+docker = ">=4.3.1,<5.0.0"
+durations = ">=0.3.3,<0.4.0"
+fire = ">=0.4.0,<0.5.0"
+jsonmerge = ">=1.7.0,<2.0.0"
+multitail2 = ">=1.5.2,<2.0.0"
+python-dateutil = ">=2.8.1,<3.0.0"
+python-dotenv = ">=0.19.2,<0.20.0"
+PyYAML = ">=5.3.1,<6.0.0"
+supervisor = ">=4.2.1,<5.0.0"
+tomlkit = ">=0.7.0,<0.8.0"
+
 [[package]]
 name = "pytest"
 version = "6.2.5"
 description = "pytest: simple powerful testing with Python"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 
@@ -408,7 +542,6 @@ python-versions = ">=3.6"
 atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=19.2.0"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<2.0"
@@ -419,24 +552,72 @@ toml = "*"
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-name = "pytest-grpc"
-version = "0.8.0"
-description = "pytest plugin for grpc"
-category = "main"
+name = "pytest-env"
+version = "0.6.2"
+description = "py.test plugin that allows you to add environment variables."
+category = "dev"
 optional = false
 python-versions = "*"
 
 [package.dependencies]
-pytest = ">=3.6.0"
+pytest = ">=2.6.0"
+
+[[package]]
+name = "python-dateutil"
+version = "2.8.2"
+description = "Extensions to the standard Python datetime module"
+category = "dev"
+optional = false
+python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,>=2.7"
+
+[package.dependencies]
+six = ">=1.5"
 
 [[package]]
-name = "regex"
-version = "2021.11.10"
-description = "Alternative regular expression module, to replace re."
+name = "python-dotenv"
+version = "0.19.2"
+description = "Read key-value pairs from a .env file and set them as environment variables"
+category = "dev"
+optional = false
+python-versions = ">=3.5"
+
+[package.extras]
+cli = ["click (>=5.0)"]
+
+[[package]]
+name = "pywin32"
+version = "227"
+description = "Python for Window Extensions"
 category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "pyyaml"
+version = "5.4.1"
+description = "YAML parser and emitter for Python"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
+
+[[package]]
+name = "requests"
+version = "2.27.1"
+description = "Python HTTP for Humans."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
+
+[package.dependencies]
+certifi = ">=2017.4.17"
+charset-normalizer = {version = ">=2.0.0,<2.1.0", markers = "python_version >= \"3\""}
+idna = {version = ">=2.5,<4", markers = "python_version >= \"3\""}
+urllib3 = ">=1.21.1,<1.27"
+
+[package.extras]
+socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
+use_chardet_on_py3 = ["chardet (>=3.0.2,<5)"]
+
 [[package]]
 name = "six"
 version = "1.16.0"
@@ -445,25 +626,52 @@ category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 
+[[package]]
+name = "supervisor"
+version = "4.2.4"
+description = "A system for controlling process state under UNIX"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[package.extras]
+testing = ["pytest", "pytest-cov"]
+
+[[package]]
+name = "termcolor"
+version = "1.1.0"
+description = "ANSII Color formatting for output in terminal."
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "toml"
 version = "0.10.2"
 description = "Python Library for Tom's Obvious, Minimal Language"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "tomli"
-version = "1.2.2"
+version = "1.2.3"
 description = "A lil' TOML parser"
 category = "dev"
 optional = false
 python-versions = ">=3.6"
 
+[[package]]
+name = "tomlkit"
+version = "0.7.2"
+description = "Style preserving TOML library"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
 [[package]]
 name = "tox"
-version = "3.24.4"
+version = "3.24.5"
 description = "tox is a generic virtualenv management and test command line tool"
 category = "dev"
 optional = false
@@ -472,7 +680,6 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 [package.dependencies]
 colorama = {version = ">=0.4.1", markers = "platform_system == \"Windows\""}
 filelock = ">=3.0.0"
-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 packaging = ">=14"
 pluggy = ">=0.12.0"
 py = ">=1.4.17"
@@ -482,21 +689,13 @@ virtualenv = ">=16.0.0,<20.0.0 || >20.0.0,<20.0.1 || >20.0.1,<20.0.2 || >20.0.2,
 
 [package.extras]
 docs = ["pygments-github-lexers (>=0.0.5)", "sphinx (>=2.0.0)", "sphinxcontrib-autoprogram (>=0.1.5)", "towncrier (>=18.5.0)"]
-testing = ["flaky (>=3.4.0)", "freezegun (>=0.3.11)", "psutil (>=5.6.1)", "pytest (>=4.0.0)", "pytest-cov (>=2.5.1)", "pytest-mock (>=1.10.0)", "pytest-randomly (>=1.0.0)", "pytest-xdist (>=1.22.2)", "pathlib2 (>=2.3.3)"]
-
-[[package]]
-name = "typed-ast"
-version = "1.5.0"
-description = "a fork of Python 2 and 3 ast modules with type comment support"
-category = "dev"
-optional = false
-python-versions = ">=3.6"
+testing = ["flaky (>=3.4.0)", "freezegun (>=0.3.11)", "pytest (>=4.0.0)", "pytest-cov (>=2.5.1)", "pytest-mock (>=1.10.0)", "pytest-randomly (>=1.0.0)", "psutil (>=5.6.1)", "pathlib2 (>=2.3.3)"]
 
 [[package]]
 name = "typing-extensions"
 version = "4.0.1"
 description = "Backported and Experimental Type Hints for Python 3.6+"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=3.6"
 
@@ -508,19 +707,30 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "urllib3"
+version = "1.26.8"
+description = "HTTP library with thread-safe connection pooling, file post, and more."
+category = "dev"
+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 = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
+socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
+
 [[package]]
 name = "virtualenv"
-version = "20.10.0"
+version = "20.13.0"
 description = "Virtual Python Environment builder"
 category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 
 [package.dependencies]
-"backports.entry-points-selectable" = ">=1.0.4"
 distlib = ">=0.3.1,<1"
 filelock = ">=3.2,<4"
-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 platformdirs = ">=2,<3"
 six = ">=1.9.0,<2"
 
@@ -528,22 +738,35 @@ six = ">=1.9.0,<2"
 docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=21.3)"]
 testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "packaging (>=20.0)"]
 
+[[package]]
+name = "websocket-client"
+version = "1.2.3"
+description = "WebSocket client for Python with low level API options"
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+docs = ["Sphinx (>=3.4)", "sphinx-rtd-theme (>=0.5)"]
+optional = ["python-socks", "wsaccel"]
+test = ["websockets"]
+
 [[package]]
 name = "zipp"
-version = "3.6.0"
+version = "3.7.0"
 description = "Backport of pathlib-compatible object wrapper for zip files"
-category = "main"
+category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.7"
 
 [package.extras]
 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)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
+testing = ["pytest (>=6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
 
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-python-versions = ">=3.7, <4.0"
-content-hash = "8a44193749552f007d83c50a61e6421ee764f9b347234b5d6364f60b68fc5cb4"
+python-versions = ">=3.8, <4.0"
+content-hash = "5178518340567141106da8fe836f6a34b5bc3f671b7024cb9db291e617c41236"
 
 [metadata.files]
 atomicwrites = [
@@ -551,20 +774,24 @@ atomicwrites = [
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+    {file = "attrs-21.4.0-py2.py3-none-any.whl", hash = "sha256:2d27e3784d7a565d36ab851fe94887c5eccd6a463168875832a1be79c82828b4"},
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@@ -575,123 +802,141 @@ colorama = [
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 ]
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-    {file = "typed_ast-1.5.0-cp39-cp39-manylinux_2_5_x86_64.manylinux1_x86_64.manylinux_2_12_x86_64.manylinux2010_x86_64.whl", hash = "sha256:e8a9b9c87801cecaad3b4c2b8876387115d1a14caa602c1618cedbb0cb2a14e6"},
-    {file = "typed_ast-1.5.0-cp39-cp39-win_amd64.whl", hash = "sha256:ec184dfb5d3d11e82841dbb973e7092b75f306b625fad7b2e665b64c5d60ab3f"},
-    {file = "typed_ast-1.5.0.tar.gz", hash = "sha256:ff4ad88271aa7a55f19b6a161ed44e088c393846d954729549e3cde8257747bb"},
+    {file = "tox-3.24.5-py2.py3-none-any.whl", hash = "sha256:be3362472a33094bce26727f5f771ca0facf6dafa217f65875314e9a6600c95c"},
+    {file = "tox-3.24.5.tar.gz", hash = "sha256:67e0e32c90e278251fea45b696d0fef3879089ccbe979b0c556d35d5a70e2993"},
 ]
 typing-extensions = [
     {file = "typing_extensions-4.0.1-py3-none-any.whl", hash = "sha256:7f001e5ac290a0c0401508864c7ec868be4e701886d5b573a9528ed3973d9d3b"},
@@ -890,11 +1172,19 @@ typing-extensions = [
 untokenize = [
     {file = "untokenize-0.1.1.tar.gz", hash = "sha256:3865dbbbb8efb4bb5eaa72f1be7f3e0be00ea8b7f125c69cbd1f5fda926f37a2"},
 ]
+urllib3 = [
+    {file = "urllib3-1.26.8-py2.py3-none-any.whl", hash = "sha256:000ca7f471a233c2251c6c7023ee85305721bfdf18621ebff4fd17a8653427ed"},
+    {file = "urllib3-1.26.8.tar.gz", hash = "sha256:0e7c33d9a63e7ddfcb86780aac87befc2fbddf46c58dbb487e0855f7ceec283c"},
+]
 virtualenv = [
-    {file = "virtualenv-20.10.0-py2.py3-none-any.whl", hash = "sha256:4b02e52a624336eece99c96e3ab7111f469c24ba226a53ec474e8e787b365814"},
-    {file = "virtualenv-20.10.0.tar.gz", hash = "sha256:576d05b46eace16a9c348085f7d0dc8ef28713a2cabaa1cf0aea41e8f12c9218"},
+    {file = "virtualenv-20.13.0-py2.py3-none-any.whl", hash = "sha256:339f16c4a86b44240ba7223d0f93a7887c3ca04b5f9c8129da7958447d079b09"},
+    {file = "virtualenv-20.13.0.tar.gz", hash = "sha256:d8458cf8d59d0ea495ad9b34c2599487f8a7772d796f9910858376d1600dd2dd"},
+]
+websocket-client = [
+    {file = "websocket-client-1.2.3.tar.gz", hash = "sha256:1315816c0acc508997eb3ae03b9d3ff619c9d12d544c9a9b553704b1cc4f6af5"},
+    {file = "websocket_client-1.2.3-py3-none-any.whl", hash = "sha256:2eed4cc58e4d65613ed6114af2f380f7910ff416fc8c46947f6e76b6815f56c0"},
 ]
 zipp = [
-    {file = "zipp-3.6.0-py3-none-any.whl", hash = "sha256:9fe5ea21568a0a70e50f273397638d39b03353731e6cbbb3fd8502a33fec40bc"},
-    {file = "zipp-3.6.0.tar.gz", hash = "sha256:71c644c5369f4a6e07636f0aa966270449561fcea2e3d6747b8d23efaa9d7832"},
+    {file = "zipp-3.7.0-py3-none-any.whl", hash = "sha256:b47250dd24f92b7dd6a0a8fc5244da14608f3ca90a5efcd37a3b1642fac9a375"},
+    {file = "zipp-3.7.0.tar.gz", hash = "sha256:9f50f446828eb9d45b267433fd3e9da8d801f614129124863f9c51ebceafb87d"},
 ]
diff --git a/pyproject.toml b/pyproject.toml
index cf5cb5d..8e80eb7 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ include = ["LICENSE"]
 exclude = ["generate_protos.sh"]
 
 [tool.poetry.dependencies]
-python = ">=3.7, <4.0"
+python = ">=3.8, <4.0"
 ecdsa = ">=0.14.0, <0.17.0"
 bech32 = "~=1.1.0"
 mnemonic = ">=0.19, <0.20"
@@ -33,7 +33,10 @@ tox = "^3.24.4"
 flake8 = "^4.0.1"
 mdformat-black = "^0.1.1"
 mdformat-toc = "^0.3.0"
-pytest-grpc = "^0.8.0"
+pytest-env = "^0.6.2"
+pystarport = "^0.2.3"
+requests = "^2.27.1"
+toml = "^0.10.2"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]
diff --git a/tox.ini b/tox.ini
index 434f074..926c8b3 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py{37,38,39}
+envlist = py{38,39}
 
 # Define the minimal tox version required to run;
 # if the host tox is less than this the tool with create an environment and
@@ -24,9 +24,12 @@ deps =
     mdformat-black
     mdformat-toc
     pytest
-    pytest-grpc
     grpcio-tools
     grpcio
+    pytest-env
+    pystarport
+    requests
+    toml
 commands =
     poetry run flake8 .
     poetry run isort --check-only .


Test patch:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 626a2b1..564473f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        tox_env: [py37, py38, py39]
+        tox_env: [py38, py39]
     steps:
     - name: Checkout
       uses: actions/checkout@v2
diff --git a/tests/configs/default.yaml b/tests/configs/default.yaml
new file mode 100644
index 0000000..a9709eb
--- /dev/null
+++ b/tests/configs/default.yaml
@@ -0,0 +1,23 @@
+chaintest:
+  validators:
+    - coins: 10cro
+      staked: 10cro
+    - coins: 10cro
+      staked: 10cro
+  accounts:
+    - name: community
+      coins: 100cro
+    - name: ecosystem
+      coins: 200cro
+    - name: reserve
+      coins: 200cro
+      vesting: "60s"
+    - name: alice
+      coins: 5000cro
+    - name: bob
+      coins: 5000cro
+  genesis:
+    app_state:
+      staking:
+        params:
+          unbonding_time: "10s"
diff --git a/tests/conftest.py b/tests/conftest.py
new file mode 100644
index 0000000..06a9586
--- /dev/null
+++ b/tests/conftest.py
@@ -0,0 +1,74 @@
+import json
+from pathlib import Path
+
+import pytest
+import toml
+import yaml
+
+from chainlibpy import NetworkConfig
+
+from .utils import check_local_chain_binary, cluster_fixture_aux
+
+
+@pytest.fixture(scope="session")
+def config_path() -> Path:
+    return Path(__file__).parent.joinpath("configs", "default.yaml")
+
+
+@pytest.fixture(scope="session")
+def data_folder(tmp_path_factory: "pytest.TempPathFactory") -> "Path":
+    return tmp_path_factory.mktemp("data")
+
+
+@pytest.fixture(scope="session", autouse=True)
+def cluster(data_folder, config_path):
+    check_local_chain_binary()
+
+    cmd = Path(__file__).parent.joinpath("chain-maind")
+    yield from cluster_fixture_aux(config_path, data_folder, cmd)
+
+
+@pytest.fixture(scope="session")
+def chain_id(config_path):
+    with open(config_path, "r") as f:
+        chain_config = yaml.safe_load(f)
+
+    # Assumption: only one chain should be spawned by pystarport from config file
+    if len(chain_config) == 1:
+        return list(chain_config.keys())[0]
+    else:
+        raise TypeError("Not exactly one chain found in config file")
+
+
+@pytest.fixture(scope="session")
+def blockchain_config_dict(config_path, chain_id):
+    with open(config_path, "r") as f:
+        config = yaml.safe_load(f)
+    return config[chain_id]
+
+
+@pytest.fixture(scope="session")
+def blockchain_accounts(data_folder: "Path", chain_id):
+    with open(data_folder.joinpath(chain_id, "accounts.json"), "r") as f:
+        account_dict = json.load(f)
+    return account_dict
+
+
+@pytest.fixture(scope="session", autouse=True)
+def local_test_network_config(data_folder: "Path", chain_id):
+    validator0_app_config_file = data_folder.joinpath(chain_id, "node0", "config", "app.toml")
+
+    if not Path(validator0_app_config_file).is_file():
+        raise FileNotFoundError(f"{validator0_app_config_file} not found")
+
+    with open(validator0_app_config_file, "r") as f:
+        validator0_app_config = toml.load(f)
+
+    return NetworkConfig(
+        grpc_endpoint=validator0_app_config["grpc"]["address"],
+        chain_id=chain_id,
+        address_prefix="cro",
+        coin_denom="cro",
+        coin_base_denom="basecro",
+        derivation_path="m/44'/394'/0'/0/0",
+    )
diff --git a/tests/pytest.ini b/tests/pytest.ini
new file mode 100644
index 0000000..797ab50
--- /dev/null
+++ b/tests/pytest.ini
@@ -0,0 +1,5 @@
+[pytest]
+env =
+    ; To avoid "Error: Cannot open an HTTP server: socket.error reported AF_UNIX path too long"
+    ; PYTEST_DEBUG_TEMPROOT is used by pytest default tmp_path_factory fixture
+    PYTEST_DEBUG_TEMPROOT=/tmp
\ No newline at end of file
diff --git a/tests/test_grpc_client.py b/tests/test_grpc_client.py
index 3cc2ed1..c56d65a 100644
--- a/tests/test_grpc_client.py
+++ b/tests/test_grpc_client.py
@@ -5,6 +5,8 @@
 
 from chainlibpy import CRO_NETWORK, GrpcClient, NetworkConfig, Wallet
 
+from .utils import ALICE, get_blockchain_account_info, get_predefined_account_coins
+
 
 @pytest.mark.parametrize("network_config", CRO_NETWORK.values())
 def test_network_config(network_config: "NetworkConfig"):
@@ -24,3 +26,19 @@ def test_network_config(network_config: "NetworkConfig"):
         client.query_bank_denom_metadata(network_config.coin_base_denom).metadata.base
         == network_config.coin_base_denom
     )
+
+
+# TODO
+# Note: temporary test case to test newly added fixtures and local test environment
+def test_test_environment(blockchain_config_dict, blockchain_accounts, local_test_network_config):
+    alice_coin = get_predefined_account_coins(blockchain_config_dict, ALICE)
+    print(alice_coin)
+
+    alice_account = get_blockchain_account_info(blockchain_accounts, ALICE)
+    print(alice_account)
+
+    wallet_default_derivation = Wallet(alice_account["mnemonic"])
+    assert wallet_default_derivation.address == alice_account["address"]
+
+    client = GrpcClient(wallet_default_derivation, local_test_network_config)
+    print(client.get_balance(wallet_default_derivation.address, "basecro"))
diff --git a/tests/utils.py b/tests/utils.py
new file mode 100644
index 0000000..f957a87
--- /dev/null
+++ b/tests/utils.py
@@ -0,0 +1,165 @@
+import platform
+import shutil
+import socket
+import subprocess
+import sys
+import tarfile
+import time
+from pathlib import Path
+
+import requests
+import yaml
+from pystarport import cluster
+from pystarport.ports import grpc_port, rpc_port
+
+# constants in `configs/default.yaml`
+ALICE = "alice"
+BOB = "bob"
+
+
+def wait_for_block(cli, height, timeout=240):
+    for _ in range(timeout * 2):
+        try:
+            status = cli.status()
+        except AssertionError as e:
+            print(f"get sync status failed: {e}", file=sys.stderr)
+        else:
+            current_height = int(status["SyncInfo"]["latest_block_height"])
+            if current_height >= height:
+                break
+            print("current block height", current_height)
+        time.sleep(0.5)
+    else:
+        raise TimeoutError(f"wait for block {height} timeout")
+
+
+def wait_for_port(port, host="127.0.0.1", timeout=40.0):
+    start_time = time.perf_counter()
+    while True:
+        try:
+            with socket.create_connection((host, port), timeout=timeout):
+                break
+        except OSError as ex:
+            time.sleep(0.1)
+            if time.perf_counter() - start_time >= timeout:
+                raise TimeoutError(
+                    "Waited too long for the port {} on host {} to start accepting "
+                    "connections.".format(port, host)
+                ) from ex
+
+
+_next_unique = 0
+
+
+def gen_base_port():
+    global _next_unique
+    base_port = 10000 + _next_unique * 100
+    _next_unique += 1
+    return base_port
+
+
+def cluster_fixture_aux(config_path, data_folder, cmd):
+    base_port = gen_base_port()
+    print("init cluster at", data_folder, ", base port:", base_port)
+    cluster.init_cluster(data_folder, config_path, base_port, cmd=cmd)
+
+    config = yaml.safe_load(open(config_path))
+    clis = {}
+    for key in config:
+        chain_id = key
+        clis[chain_id] = cluster.ClusterCLI(data_folder, chain_id=chain_id, cmd=cmd)
+
+    supervisord = cluster.start_cluster(data_folder)
+
+    try:
+        for cli in clis.values():
+            # wait for first node rpc port available before start testing
+            wait_for_port(rpc_port(cli.config["validators"][0]["base_port"]))
+            # wait for first node grpc port available before start testing
+            wait_for_port(grpc_port(cli.config["validators"][0]["base_port"]))
+            # wait for the first block generated before start testing
+            wait_for_block(cli, 2)
+
+        if len(clis) == 1:
+            yield list(clis.values())[0]
+        else:
+            yield clis
+    finally:
+        supervisord.terminate()
+        supervisord.wait()
+
+
+def get_predefined_account_coins(blockchain_config_dict, account_name):
+    account = [i for i in blockchain_config_dict["accounts"] if i["name"] == account_name]
+
+    if len(account):
+        return account[0]["coins"]
+    else:
+        raise ValueError(f"{account_name} not found in predefined accounts")
+
+
+def get_blockchain_account_info(blockchain_accounts, account_name):
+    account = [i for i in blockchain_accounts if i["name"] == account_name]
+
+    if len(account):
+        return account[0]
+    else:
+        raise ValueError(f"{account_name} not found in blockchain accounts")
+
+
+def download_latest_binary(latest_release_info):
+    latest_release_version = latest_release_info["tag_name"].lstrip("v")
+    compatible_asset_name = (
+        f"chain-main_{latest_release_version}_{platform.system()}_{platform.machine()}"
+    )
+
+    compatible_asset = [
+        i for i in latest_release_info["assets"] if compatible_asset_name in i["name"]
+    ]
+
+    if len(compatible_asset):
+        asset = compatible_asset[0]
+        local_file = Path(__file__).parent.joinpath(asset["name"])
+        extract_directory = Path(__file__).parent.joinpath(compatible_asset_name)
+
+        data = requests.get(asset["browser_download_url"])
+        with open(local_file, "wb") as f:
+            f.write(data.content)
+
+        tar = tarfile.open(local_file, "r:gz")
+        tar.extractall(extract_directory)
+        tar.close()
+
+        shutil.copy2(
+            Path(extract_directory).joinpath("bin", "chain-maind"),
+            Path(__file__).parent.joinpath("chain-maind"),
+        )
+
+        shutil.rmtree(extract_directory)
+        local_file.unlink()
+    else:
+        raise ValueError(
+            f"{compatible_asset_name} could not be found on crypto-org-chain/chain-main GitHub release"  # noqa 501
+        )
+
+
+def check_local_chain_binary():
+    chain_maind = Path(__file__).parent.joinpath("chain-maind")
+    latest_release_info = requests.get(
+        "https://api.github.com/repos/crypto-org-chain/chain-main/releases/latest"
+    ).json()
+
+    if chain_maind.is_file():
+        process = subprocess.run([f"{chain_maind}", "version"], capture_output=True)
+
+        latest_release_version = latest_release_info["tag_name"].lstrip("v")
+        local_version = process.stdout.decode("utf-8").rstrip()
+
+        if latest_release_version != local_version:
+            print(
+                f"download binary due to outdated version local: {local_version}, latest release: {latest_release_version}"  # noqa 501
+            )
+            download_latest_binary(latest_release_info)
+    else:
+        print("download binary due to missing chain-maind binary")
+        download_latest_binary(latest_release_info)