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Gav Wood
105 lines
2.7 KiB
Markdown
105 lines
2.7 KiB
Markdown
# Polkadot
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Implementation of a https://polkadot.io node in Rust.
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## To play
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If you'd like to play with Polkadot, you'll need to install a client like this
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one. First, get Rust (1.26.1 or later) and the support software if you don't already have it:
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```
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curl https://sh.rustup.rs -sSf | sh
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sudo apt install make clang
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```
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Then, install Polkadot PoC-1:
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```
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cargo install --git https://github.com/paritytech/polkadot.git --branch v0.1
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```
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You'll now have a `polkadot` binary installed to your `PATH`. You can drop the
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`--branch v0.1` or run `cargo install --git https://github.com/paritytech/polkadot.git polkadot`
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to get the very latest version of Polkadot, but these instructions will not work in that case.
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### Development
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You can run a simple single-node development "network" on your machine by
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running in a terminal:
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```
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polkadot --chain=dev --validator --key Alice
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```
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You can muck around by cloning and building the http://github.com/paritytech/polka-ui and http://github.com/paritytech/polkadot-ui or just heading to https://polkadot.js.org/apps.
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### PoC-1 Testnet
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You can also connect to the global PoC-1 testnet. To do this, just use:
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```
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polkadot --chain=poc-1
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```
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If you want to do anything on it (not that there's much to do), then you'll need
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to get some PoC-1 testnet DOTs. Ask in the Polkadot watercooler.
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## Local Two-node Testnet
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If you want to see the multi-node consensus algorithm in action locally, then
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you can create a local testnet. You'll need two terminals open. In one, run:
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```
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polkadot --chain=local --validator --key Alice -d /tmp/alice
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```
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and in the other, run:
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```
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polkadot --chain=local --validator --key Bob -d /tmp/bob --port 30334 --bootnodes 'enode://ALICE_BOOTNODE_ID_HERE@127.0.0.1:30333'
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```
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Ensure you replace `ALICE_BOOTNODE_ID_HERE` with the node ID from the output of
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the first terminal.
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## Hacking on Polkadot
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If you'd actually like hack on Polkadot, you can just grab the source code and
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build it. Ensure you have Rust and the support software installed:
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```
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curl https://sh.rustup.rs -sSf | sh
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rustup update nightly
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rustup target add wasm32-unknown-unknown --toolchain nightly
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rustup update stable
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cargo install --git https://github.com/alexcrichton/wasm-gc
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cargo install --git https://github.com/pepyakin/wasm-export-table.git
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sudo apt install make clang
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```
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Then, grab the Polkadot source code:
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```
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git clone https://github.com/paritytech/polkadot.git
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cd polkadot
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```
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Then build the code:
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```
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./build.sh # Builds the WebAssembly binaries
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cargo build # Builds all native code
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```
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You can run the tests if you like:
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```
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cargo test --all
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```
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You can start a development chain with:
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```
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cargo run -- --chain=dev --validator --key Alice
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```
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