How to run the Nimiq Rust node on Android

I tried it with Android 9, can't guarantee it will work with previous versions.

• First, install Termux from Google Play or FDroid

To make things easier I'd recommend running the SSH server from Termux and doing the rest remotely from your desktop. Follow the instructions to setup the server: https://wiki.termux.com/wiki/Remote_Access#OpenSSH

• Ensure everything is up-to-date

pkg upgrade

• Install necessary packages

pkg install -y pkg-config openssl-tool git wget nano

• Install Rust

pkg install -y rust

• Add Rust nightly

pkg install -y unstable-repo
pkg install -y rustc-nightly

• Clone the Nimiq repo

git clone https://github.com/nimiq/core-rs.git nimiq-rs/
cd nimiq-rs/

• Prepare the environment

# use Rust nightly
export RUSTC=$PREFIX/opt/rust-nightly/bin/rustc
# Android lacks robust mutex support
export CFLAGS=-DMDB_USE_ROBUST=0

• Apply ARM patch

sed -i s/opt\.c/ref\.c/ libargon2-sys/build.rs
wget -O libargon2-sys/native/ref.c https://github.com/nimiq/core-js/raw/master/src/native/ref.c

• Build and install the client

cargo build --release
cargo install --path client/

• Add Cargo binaries to your path (put to .profile to make changes permanent)

export PATH="$HOME/.cargo/bin:$PATH"

• Prepare the configuration

cd ~
mkdir .nimiq
cp nimiq-rs/client/client.example.toml .nimiq/client.toml
nano .nimiq/client.toml

Change the host parameter to match your IP address (or a domain name if you have one), save and exit.

• Run the client

nimiq-client

It will start synchronizing, the process will take several hours or more depending on your network speed.