From 6f3964bfa1fa2f69faaf6f9ee7a06df331241c3b Mon Sep 17 00:00:00 2001
From: V <v@example.com>
Date: Tue, 26 May 2020 05:20:16 +0000
Subject: [PATCH] Dockerization

---
 Dockerfile           | 34 ++++++++++++++++++++++++++++++++++
 README.md            |  7 +++++++
 docker-entrypoint.sh | 14 ++++++++++++++
 gasExpress.py        |  6 ++++--
 4 files changed, 59 insertions(+), 2 deletions(-)
 create mode 100644 Dockerfile
 create mode 100755 docker-entrypoint.sh
 mode change 100644 => 100755 gasExpress.py

diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..061dc30
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,34 @@
+FROM python:3.6-slim-buster as build
+
+COPY requirements.txt .
+
+RUN apt-get update -y \
+  && apt-get install -y build-essential \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* \
+  &&  pip3 install wheel \
+  &&  pip3 install --user -r requirements.txt
+
+FROM python:3.6-slim-buster
+
+ENV USER gasoracle
+
+RUN useradd -r $USER \
+  && apt-get update -y \
+  && apt-get install -y gosu \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+
+COPY --from=build --chown=$USER:root /root/.local /home/$USER/.local
+COPY gasExpress.py /usr/local/bin/
+
+ENV OUTPUT_DIR /data
+VOLUME ["$OUTPUT_DIR"]
+WORKDIR "$OUTPUT_DIR"
+
+COPY docker-entrypoint.sh /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]
+
+CMD ["gasExpress.py"]
diff --git a/README.md b/README.md
index 5bef4b2..99c0ba8 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,10 @@ This is a simple gas price oracle that can be used if you are running a local ge
 usage: python3 gasExpress.py
 
 requirements: pip3 install -r requirements.txt
+
+## Docker
+```
+docker build -t gasstation-express .
+docker run -e ETH_NODE_URL=http://10.1.0.23:8545 -e OUTPUT_DIR=/data/mainnet \
+-v $(pwd)/data:/data -it gasstation-express
+```
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
new file mode 100755
index 0000000..7ec674d
--- /dev/null
+++ b/docker-entrypoint.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+set -e
+
+
+if [ "$1" = "gasExpress.py" ]; then
+  mkdir -p "$OUTPUT_DIR"
+  chmod 755 "$OUTPUT_DIR"
+  chown -R $USER "$OUTPUT_DIR"
+  cd "$OUTPUT_DIR"
+  exec gosu $USER "$@"
+fi
+
+echo
+exec "$@"
diff --git a/gasExpress.py b/gasExpress.py
old mode 100644
new mode 100755
index 65346d7..e95b003
--- a/gasExpress.py
+++ b/gasExpress.py
@@ -1,3 +1,5 @@
+#!/usr/bin/env python3
+
 import time
 import sys
 import json
@@ -8,8 +10,8 @@
 import numpy as np
 from web3 import Web3, HTTPProvider
 
-
-web3 = Web3(HTTPProvider('http://localhost:8545'))
+node_url = os.getenv('ETH_NODE_URL', 'http://localhost:8545')
+web3 = Web3(HTTPProvider(node_url))
 
 ### These are the threholds used for % blocks accepting to define the recommended gas prices. can be edited here if desired