deploy.rs

use std::array::TryFromSliceError;
use std::fmt::Debug;
use std::num::ParseIntError;

use clap::{arg, command, Parser};
use hex::FromHexError;
use rand::Rng;
use sha2::{Digest, Sha256};
use soroban_env_host::xdr::{
    AccountId, ContractId, CreateContractArgs, Error as XdrError, Hash, HashIdPreimage,
    HostFunction, InvokeHostFunctionOp, LedgerFootprint, LedgerKey::ContractCode,
    LedgerKey::ContractData, LedgerKeyContractCode, LedgerKeyContractData, Memo, MuxedAccount,
    Operation, OperationBody, Preconditions, PublicKey, ScVal, SequenceNumber, Transaction,
    TransactionEnvelope, TransactionExt, Uint256, VecM, WriteXdr,
};
use soroban_env_host::xdr::{HashIdPreimageSourceAccountContractId, ScContractExecutable};
use soroban_env_host::HostError;

use crate::{
    commands::{config, contract::install, HEADING_RPC, HEADING_SANDBOX},
    rpc::{self, Client},
    utils, wasm,
};

#[derive(Parser, Debug, Clone)]
#[command(group(
    clap::ArgGroup::new("wasm_src")
        .required(true)
        .args(&["wasm", "wasm_hash"]),
))]
#[group(skip)]
pub struct Cmd {
    /// WASM file to deploy
    #[arg(long, group = "wasm_src")]
    wasm: Option<std::path::PathBuf>,

    /// Hash of the already installed/deployed WASM file
    #[arg(long = "wasm-hash", conflicts_with = "wasm", group = "wasm_src")]
    wasm_hash: Option<String>,

    /// Contract ID to deploy to
    #[arg(
        long = "id",
        conflicts_with = "rpc_url",
        help_heading = HEADING_SANDBOX,
    )]
    contract_id: Option<String>,
    /// Custom salt 32-byte salt for the token id
    #[arg(
        long,
        conflicts_with_all = &["contract_id", "ledger_file"],
        help_heading = HEADING_RPC,
    )]
    salt: Option<String>,
    #[command(flatten)]
    config: config::Args,
}

#[derive(thiserror::Error, Debug)]
pub enum Error {
    #[error(transparent)]
    Install(#[from] install::Error),
    #[error(transparent)]
    Host(#[from] HostError),
    #[error("error parsing int: {0}")]
    ParseIntError(#[from] ParseIntError),
    #[error("internal conversion error: {0}")]
    TryFromSliceError(#[from] TryFromSliceError),
    #[error("xdr processing error: {0}")]
    Xdr(#[from] XdrError),
    #[error("jsonrpc error: {0}")]
    JsonRpc(#[from] jsonrpsee_core::Error),
    #[error("cannot parse salt: {salt}")]
    CannotParseSalt { salt: String },
    #[error("cannot parse contract ID {contract_id}: {error}")]
    CannotParseContractId {
        contract_id: String,
        error: FromHexError,
    },
    #[error("cannot parse WASM hash {wasm_hash}: {error}")]
    CannotParseWasmHash {
        wasm_hash: String,
        error: FromHexError,
    },
    #[error("Must provide either --wasm or --wash-hash")]
    WasmNotProvided,
    #[error(transparent)]
    Rpc(#[from] rpc::Error),
    #[error(transparent)]
    Config(#[from] config::Error),
}

impl Cmd {
    pub async fn run(&self) -> Result<(), Error> {
        let res_str = self.run_and_get_contract_id().await?;
        println!("{res_str}");
        Ok(())
    }

    pub async fn run_and_get_contract_id(&self) -> Result<String, Error> {
        let wasm_hash = if let Some(wasm) = &self.wasm {
            let hash = install::Cmd {
                wasm: wasm::Args { wasm: wasm.clone() },
                config: self.config.clone(),
            }
            .run_and_get_hash()
            .await?;
            hex::encode(hash)
        } else {
            self.wasm_hash
                .as_ref()
                .ok_or(Error::WasmNotProvided)?
                .to_string()
        };

        let hash =
            Hash(
                utils::id_from_str(&wasm_hash).map_err(|e| Error::CannotParseWasmHash {
                    wasm_hash: wasm_hash.clone(),
                    error: e,
                })?,
            );

        if self.config.is_no_network() {
            self.run_in_sandbox(hash)
        } else {
            self.run_against_rpc_server(hash).await
        }
    }

    #[allow(clippy::needless_pass_by_value)]
    pub fn run_in_sandbox(&self, wasm_hash: Hash) -> Result<String, Error> {
        let contract_id: [u8; 32] = match &self.contract_id {
            Some(id) => utils::id_from_str(id).map_err(|e| Error::CannotParseContractId {
                contract_id: self.contract_id.as_ref().unwrap().clone(),
                error: e,
            })?,
            None => rand::thread_rng().gen::<[u8; 32]>(),
        };

        let mut state = self.config.get_state()?;
        utils::add_contract_to_ledger_entries(&mut state.ledger_entries, contract_id, wasm_hash.0);
        self.config.set_state(&mut state)?;
        Ok(hex::encode(contract_id))
    }

    async fn run_against_rpc_server(&self, wasm_hash: Hash) -> Result<String, Error> {
        let network = self.config.get_network()?;
        let salt: [u8; 32] = match &self.salt {
            // Hack: re-use contract_id_from_str to parse the 32-byte salt hex.
            Some(h) => {
                utils::id_from_str(h).map_err(|_| Error::CannotParseSalt { salt: h.clone() })?
            }
            None => rand::thread_rng().gen::<[u8; 32]>(),
        };

        let client = Client::new(&network.rpc_url);
        let key = self.config.key_pair()?;

        // Get the account sequence number
        let public_strkey = stellar_strkey::ed25519::PublicKey(key.public.to_bytes()).to_string();
        // TODO: create a cmdline parameter for the fee instead of simply using the minimum fee
        let fee: u32 = 100;

        let account_details = client.get_account(&public_strkey).await?;
        let sequence: i64 = account_details.seq_num.into();
        let (tx, contract_id) = build_create_contract_tx(
            wasm_hash,
            sequence + 1,
            fee,
            &network.network_passphrase,
            salt,
            &key,
        )?;
        client.send_transaction(&tx).await?;

        Ok(hex::encode(contract_id.0))
    }
}

fn build_create_contract_tx(
    hash: Hash,
    sequence: i64,
    fee: u32,
    network_passphrase: &str,
    salt: [u8; 32],
    key: &ed25519_dalek::Keypair,
) -> Result<(TransactionEnvelope, Hash), Error> {
    let network_id = Hash(Sha256::digest(network_passphrase.as_bytes()).into());
    let preimage =
        HashIdPreimage::ContractIdFromSourceAccount(HashIdPreimageSourceAccountContractId {
            network_id,
            source_account: AccountId(PublicKey::PublicKeyTypeEd25519(
                key.public.to_bytes().into(),
            )),
            salt: Uint256(salt),
        });
    let preimage_xdr = preimage.to_xdr()?;
    let contract_id = Sha256::digest(preimage_xdr);

    let op = Operation {
        source_account: None,
        body: OperationBody::InvokeHostFunction(InvokeHostFunctionOp {
            function: HostFunction::CreateContract(CreateContractArgs {
                contract_id: ContractId::SourceAccount(Uint256(salt)),
                source: ScContractExecutable::WasmRef(hash.clone()),
            }),
            footprint: LedgerFootprint {
                read_only: vec![ContractCode(LedgerKeyContractCode { hash })].try_into()?,
                read_write: vec![ContractData(LedgerKeyContractData {
                    contract_id: Hash(contract_id.into()),
                    key: ScVal::LedgerKeyContractExecutable,
                })]
                .try_into()?,
            },
            auth: VecM::default(),
        }),
    };
    let tx = Transaction {
        source_account: MuxedAccount::Ed25519(Uint256(key.public.to_bytes())),
        fee,
        seq_num: SequenceNumber(sequence),
        cond: Preconditions::None,
        memo: Memo::None,
        operations: vec![op].try_into()?,
        ext: TransactionExt::V0,
    };

    let envelope = utils::sign_transaction(key, &tx, network_passphrase)?;

    Ok((envelope, Hash(contract_id.into())))
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn test_build_create_contract() {
        let hash = hex::decode("0000000000000000000000000000000000000000000000000000000000000000")
            .unwrap()
            .try_into()
            .unwrap();
        let result = build_create_contract_tx(
            Hash(hash),
            300,
            1,
            "Public Global Stellar Network ; September 2015",
            [0u8; 32],
            &utils::parse_secret_key("SBFGFF27Y64ZUGFAIG5AMJGQODZZKV2YQKAVUUN4HNE24XZXD2OEUVUP")
                .unwrap(),
        );

        assert!(result.is_ok());
    }
}