Tool for generating fee collection contract (#1501)

Closes #1409 

Handing off to @Dentosal 

The tests contain example of how to withdraw tokens.

---------

Co-authored-by: Hannes Karppila <hannes.karppila@gmail.com>
Co-authored-by: xgreenx <xgreenx9999@gmail.com>

CHANGELOG.md

@@ -51,6 +51,7 @@ Description of the upcoming release here.
 - [#1263](https://github.com/FuelLabs/fuel-core/pull/1263): Add gas benchmarks for `ED19` and `ECR1` instructions.
 - [#1331](https://github.com/FuelLabs/fuel-core/pull/1331): Add peer reputation reporting to block import code
 - [#1405](https://github.com/FuelLabs/fuel-core/pull/1405): Use correct names for service metrics.
+- [#1501](https://github.com/FuelLabs/fuel-core/pull/1501): Add a CLI command for generating a fee collection contract.
 
 ### Changed
 

bin/fuel-core/Cargo.toml

@@ -22,6 +22,9 @@ const_format = { version = "0.2", optional = true }
 dirs = "4.0"
 dotenvy = { version = "0.15", optional = true }
 fuel-core = { workspace = true }
+fuel-core-chain-config = { workspace = true }
+fuel-core-types = { workspace = true }
+hex = "0.4"
 humantime = "2.1"
 lazy_static = { workspace = true }
 pyroscope = "0.5"

bin/fuel-core/src/cli.rs

@@ -18,6 +18,7 @@ lazy_static::lazy_static! {
     pub static ref DEFAULT_DB_PATH: PathBuf = dirs::home_dir().unwrap().join(".fuel").join("db");
 }
 
+pub mod fee_contract;
 pub mod run;
 pub mod snapshot;
 
@@ -38,6 +39,7 @@ pub struct Opt {
 pub enum Fuel {
     Run(run::Command),
     Snapshot(snapshot::Command),
+    GenerateFeeContract(fee_contract::Command),
 }
 
 pub const LOG_FILTER: &str = "RUST_LOG";
@@ -117,6 +119,7 @@ pub async fn run_cli() -> anyhow::Result<()> {
         Ok(opt) => match opt.command {
             Fuel::Run(command) => run::exec(command).await,
             Fuel::Snapshot(command) => snapshot::exec(command).await,
+            Fuel::GenerateFeeContract(command) => fee_contract::exec(command).await,
         },
         Err(e) => {
             // Prints the error and exits.

bin/fuel-core/src/cli/fee_contract.rs

@@ -0,0 +1,40 @@
+use clap::Parser;
+use fuel_core_chain_config::fee_collection_contract;
+use fuel_core_types::fuel_tx::Address;
+use std::{
+    fs::OpenOptions,
+    io::Write,
+    path::PathBuf,
+};
+
+#[derive(Debug, Parser)]
+pub struct Command {
+    /// Address to withdraw fees to
+    withdrawal_address: Address,
+    /// Output file. If not provided, will print hex representation to stdout.
+    #[clap(short, long)]
+    output: Option<PathBuf>,
+    /// Overwrite output file if it exists. No effect if `output` is not provided.
+    #[clap(short, long)]
+    force: bool,
+}
+
+pub async fn exec(cmd: Command) -> anyhow::Result<()> {
+    let contract = fee_collection_contract::generate(cmd.withdrawal_address);
+
+    if let Some(output) = cmd.output.as_ref() {
+        let mut open_opt = OpenOptions::new();
+        if cmd.force {
+            open_opt.create(true).write(true).truncate(true);
+        } else {
+            open_opt.create_new(true).write(true);
+        }
+
+        let mut file = open_opt.open(output)?;
+        file.write_all(&contract)?;
+    } else {
+        println!("{}", hex::encode(contract));
+    }
+
+    Ok(())
+}

crates/chain-config/Cargo.toml

@@ -25,10 +25,13 @@ serde_with = "1.11"
 tracing = "0.1"
 
 [dev-dependencies]
+fuel-core = { workspace = true }
+fuel-core-client = { workspace = true }
 fuel-core-types = { workspace = true, default-features = false, features = ["random", "serde"] }
 insta = { workspace = true }
 rand = { workspace = true }
 serde_json = { version = "1.0", features = ["raw_value"] }
+tokio = { workspace = true, features = ["full"] }
 
 [features]
 default = ["std"]