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Fiber Network Node

Fiber Network Node (FNN) is a reference implementation of Fiber Network Protocol (FNP). In the current stage, it's not a production-ready implementation, but a prototype to demonstrate the feasibility of FNP. It's capable of:

  • Establishing connections with other FNN
  • Creating and closing fiber channel
  • Payments over fiber channel (via fiber-scripts)
  • Cross-chain asset transfer

Please note that the implementation is still under development, there are two major features not implemented yet:

  • Watchtower service to monitor and revoke on-chain transactions
  • Multihop payments

But as a prototype, it's a good starting point for developers to understand the FNP and try out the integration with their applications.

Build and run a testnet node

  1. Build the project:
cargo build --release
  1. Create a data folder for the node, then copy the built binary and testnet config file to it:
mkdir /folder-to/my-fnn
cp target/release/fnn /folder-to/my-fnn
cp config/testnet/config.yml /folder-to/my-fnn
cd /folder-to/my-fnn
  1. FNN has the built-in wallet functionality to sign funding transactions, let's create or import a private key first. The private key is stored in the data folder and named ckb/key. You may use the ckb-cli to generate a new key or export an existing key:
mkdir ckb
ckb-cli account export --lock-arg <lock_arg> --extended-privkey-path ./ckb/exported-key
// ckb-cli exports master private key and chain code, FNN only needs the private key part
head -n 1 ./ckb/exported-key > ./ckb/key
  1. Start the node, by default it will output logs to the console, you may redirect it to a file:
RUST_LOG=info ./fnn -c config.yml -d .

Documentation

Testnet deployment information

  • TODO: Add testnet deployed nodes information *

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