cargo-contract 2.0.0-alpha.1

// Copyright 2018-2020 Parity Technologies (UK) Ltd.
// This file is part of cargo-contract.
//
// cargo-contract is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// cargo-contract is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with cargo-contract.  If not, see <http://www.gnu.org/licenses/>.

mod call;
mod events;
mod instantiate;
mod runtime_api;
mod upload;

#[cfg(test)]
#[cfg(feature = "integration-tests")]
mod integration_tests;

use anyhow::{
    anyhow,
    Context,
    Result,
};
use colored::Colorize;
use jsonrpsee::{
    core::client::ClientT,
    rpc_params,
    ws_client::WsClientBuilder,
};
use std::{
    io::{
        self,
        Write,
    },
    path::PathBuf,
};

use self::events::display_events;
use crate::{
    crate_metadata::CrateMetadata,
    name_value_println,
    Verbosity,
    VerbosityFlags,
    DEFAULT_KEY_COL_WIDTH,
};
use pallet_contracts_primitives::ContractResult;
use scale::{
    Decode,
    Encode,
};
use sp_core::{
    crypto::Pair,
    sr25519,
    Bytes,
};
use subxt::{
    ext::sp_runtime::DispatchError,
    tx,
    Config,
    OnlineClient,
};

pub use call::CallCommand;
pub use instantiate::InstantiateCommand;
pub use subxt::PolkadotConfig as DefaultConfig;
pub use transcode::ContractMessageTranscoder;
pub use upload::UploadCommand;

type Balance = u128;
type CodeHash = <DefaultConfig as Config>::Hash;
type ContractAccount = <DefaultConfig as Config>::AccountId;
type PairSigner = tx::PairSigner<DefaultConfig, sr25519::Pair>;
type Client = OnlineClient<DefaultConfig>;

/// Arguments required for creating and sending an extrinsic to a substrate node.
#[derive(Clone, Debug, clap::Args)]
pub struct ExtrinsicOpts {
    /// Path to the `Cargo.toml` of the contract.
    #[clap(long, parse(from_os_str))]
    manifest_path: Option<PathBuf>,
    /// Websockets url of a substrate node.
    #[clap(
        name = "url",
        long,
        parse(try_from_str),
        default_value = "ws://localhost:9944"
    )]
    url: url::Url,
    /// Secret key URI for the account deploying the contract.
    #[clap(name = "suri", long, short)]
    suri: String,
    /// Password for the secret key.
    #[clap(name = "password", long, short)]
    password: Option<String>,
    #[clap(flatten)]
    verbosity: VerbosityFlags,
    /// Dry-run the extrinsic via rpc, instead of as an extrinsic. Chain state will not be mutated.
    #[clap(long)]
    dry_run: bool,
    /// The maximum amount of balance that can be charged from the caller to pay for the storage
    /// consumed.
    #[clap(long, parse(try_from_str = parse_balance))]
    storage_deposit_limit: Option<Balance>,
    /// Before submitting a transaction, do not dry-run it via RPC first.
    #[clap(long)]
    skip_dry_run: bool,
    /// Before submitting a transaction, do not ask the user for confirmation.
    #[clap(long)]
    skip_confirm: bool,
}

impl ExtrinsicOpts {
    pub fn signer(&self) -> Result<sr25519::Pair> {
        sr25519::Pair::from_string(&self.suri, self.password.as_ref().map(String::as_ref))
            .map_err(|_| anyhow::anyhow!("Secret string error"))
    }

    /// Returns the verbosity
    pub fn verbosity(&self) -> Result<Verbosity> {
        TryFrom::try_from(&self.verbosity)
    }

    /// Convert URL to String without omitting the default port
    pub fn url_to_string(&self) -> String {
        let mut res = self.url.to_string();
        match (self.url.port(), self.url.port_or_known_default()) {
            (None, Some(port)) => {
                res.insert_str(res.len() - 1, &format!(":{}", port));
                res
            }
            _ => res,
        }
    }
}

/// Parse Rust style integer balance literals which can contain underscores.
fn parse_balance(input: &str) -> Result<Balance> {
    input
        .replace('_', "")
        .parse::<Balance>()
        .map_err(Into::into)
}

/// Create a new [`PairSigner`] from the given [`sr25519::Pair`].
pub fn pair_signer(pair: sr25519::Pair) -> PairSigner {
    PairSigner::new(pair)
}

const STORAGE_DEPOSIT_KEY: &str = "Storage Deposit";
pub const MAX_KEY_COL_WIDTH: usize = STORAGE_DEPOSIT_KEY.len() + 1;

/// Print to stdout the fields of the result of a `instantiate` or `call` dry-run via RPC.
pub fn display_contract_exec_result<R, const WIDTH: usize>(
    result: &ContractResult<R, Balance>,
) -> Result<()> {
    let mut debug_message_lines = std::str::from_utf8(&result.debug_message)
        .context("Error decoding UTF8 debug message bytes")?
        .lines();
    name_value_println!("Gas Consumed", format!("{:?}", result.gas_consumed), WIDTH);
    name_value_println!("Gas Required", format!("{:?}", result.gas_required), WIDTH);
    name_value_println!(
        STORAGE_DEPOSIT_KEY,
        format!("{:?}", result.storage_deposit),
        WIDTH
    );

    // print debug messages aligned, only first line has key
    if let Some(debug_message) = debug_message_lines.next() {
        name_value_println!("Debug Message", format!("{}", debug_message), WIDTH);
    }

    for debug_message in debug_message_lines {
        name_value_println!("", format!("{}", debug_message), WIDTH);
    }
    Ok(())
}

/// Wait for the transaction to be included successfully into a block.
///
/// # Errors
///
/// If a runtime Module error occurs, this will only display the pallet and error indices. Dynamic
/// lookups of the actual error will be available once the following issue is resolved:
/// <https://github.com/paritytech/subxt/issues/443>.
///
/// # Finality
///
/// Currently this will report success once the transaction is included in a block. In the future
/// there could be a flag to wait for finality before reporting success.
async fn submit_extrinsic<T, Call>(
    client: &OnlineClient<T>,
    call: &Call,
    signer: &(dyn tx::Signer<T> + Send + Sync),
) -> Result<tx::TxEvents<T>>
where
    T: Config,
    <T::ExtrinsicParams as tx::ExtrinsicParams<T::Index, T::Hash>>::OtherParams: Default,
    Call: tx::TxPayload,
{
    client
        .tx()
        .sign_and_submit_then_watch_default(call, signer)
        .await?
        .wait_for_in_block()
        .await?
        .wait_for_success()
        .await
        .map_err(Into::into)
}

async fn state_call<A: Encode, R: Decode>(url: &str, func: &str, args: A) -> Result<R> {
    let cli = WsClientBuilder::default().build(&url).await?;
    let params = rpc_params![func, Bytes(args.encode())];
    let bytes: Bytes = cli.request("state_call", params).await?;
    Ok(R::decode(&mut bytes.as_ref())?)
}

fn error_details(error: &DispatchError, metadata: &subxt::Metadata) -> Result<String> {
    match error {
        DispatchError::Module(err) => {
            let details = metadata.error(err.index, err.error)?;
            Ok(format!(
                "ModuleError: {}::{}: {:?}",
                details.pallet(),
                details.error(),
                details.docs()
            ))
        }
        err => Ok(format!("DispatchError: {:?}", err)),
    }
}

/// Prompt the user to confirm transaction submission
fn prompt_confirm_tx<F: FnOnce()>(show_details: F) -> Result<()> {
    println!(
        "{} (skip with --skip-confirm)",
        "Confirm transaction details:".bright_white().bold()
    );
    show_details();
    print!(
        "{} ({}/n): ",
        "Submit?".bright_white().bold(),
        "Y".bright_white().bold()
    );

    let mut buf = String::new();
    io::stdout().flush()?;
    io::stdin().read_line(&mut buf)?;
    match buf.trim().to_lowercase().as_str() {
        // default is 'y'
        "y" | "" => Ok(()),
        "n" => Err(anyhow!("Transaction not submitted")),
        c => Err(anyhow!("Expected either 'y' or 'n', got '{}'", c)),
    }
}

fn print_dry_running_status(msg: &str) {
    println!(
        "{:>width$} {} (skip with --skip-dry-run)",
        "Dry-running".green().bold(),
        msg.bright_white().bold(),
        width = DEFAULT_KEY_COL_WIDTH
    );
}

fn print_gas_required_success(gas: u64) {
    println!(
        "{:>width$} Gas required estimated at {}",
        "Success!".green().bold(),
        gas.to_string().bright_white(),
        width = DEFAULT_KEY_COL_WIDTH
    );
}