Flatten back the structure (#837)

* Remove chains. * Move relay clients. * Flatten generic. * Fix fmt.
2026-05-31 05:11:02 +00:00 · 2021-03-23 14:17:33 +01:00
parent 647eb80165
commit acb872fbb0
109 changed files with 87 additions and 86 deletions
@@ -0,0 +1,114 @@
+// Copyright 2019-2020 Parity Technologies (UK) Ltd.
+// This file is part of Parity Bridges Common.
+
+// Parity Bridges Common 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.
+
+// Parity Bridges Common 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 Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Submitting Ethereum -> Substrate exchange transactions.
+
+use bp_eth_poa::{
+	signatures::{secret_to_address, SignTransaction},
+	UnsignedTransaction,
+};
+use relay_ethereum_client::{
+	types::{CallRequest, U256},
+	Client as EthereumClient, ConnectionParams as EthereumConnectionParams, SigningParams as EthereumSigningParams,
+};
+use rialto_runtime::exchange::LOCK_FUNDS_ADDRESS;
+
+/// Ethereum exchange transaction params.
+#[derive(Debug)]
+pub struct EthereumExchangeSubmitParams {
+	/// Ethereum connection params.
+	pub eth_params: EthereumConnectionParams,
+	/// Ethereum signing params.
+	pub eth_sign: EthereumSigningParams,
+	/// Ethereum signer nonce.
+	pub eth_nonce: Option<U256>,
+	/// Amount of Ethereum tokens to lock.
+	pub eth_amount: U256,
+	/// Funds recipient on Substrate side.
+	pub sub_recipient: [u8; 32],
+}
+
+/// Submit single Ethereum -> Substrate exchange transaction.
+pub async fn run(params: EthereumExchangeSubmitParams) {
+	let EthereumExchangeSubmitParams {
+		eth_params,
+		eth_sign,
+		eth_nonce,
+		eth_amount,
+		sub_recipient,
+	} = params;
+
+	let result: Result<_, String> = async move {
+		let eth_client = EthereumClient::new(eth_params)
+			.await
+			.map_err(|err| format!("error connecting to Ethereum node: {:?}", err))?;
+
+		let eth_signer_address = secret_to_address(&eth_sign.signer);
+		let sub_recipient_encoded = sub_recipient;
+		let nonce = match eth_nonce {
+			Some(eth_nonce) => eth_nonce,
+			None => eth_client
+				.account_nonce(eth_signer_address)
+				.await
+				.map_err(|err| format!("error fetching acount nonce: {:?}", err))?,
+		};
+		let gas = eth_client
+			.estimate_gas(CallRequest {
+				from: Some(eth_signer_address),
+				to: Some(LOCK_FUNDS_ADDRESS.into()),
+				value: Some(eth_amount),
+				data: Some(sub_recipient_encoded.to_vec().into()),
+				..Default::default()
+			})
+			.await
+			.map_err(|err| format!("error estimating gas requirements: {:?}", err))?;
+		let eth_tx_unsigned = UnsignedTransaction {
+			nonce,
+			gas_price: eth_sign.gas_price,
+			gas,
+			to: Some(LOCK_FUNDS_ADDRESS.into()),
+			value: eth_amount,
+			payload: sub_recipient_encoded.to_vec(),
+		};
+		let eth_tx_signed = eth_tx_unsigned
+			.clone()
+			.sign_by(&eth_sign.signer, Some(eth_sign.chain_id));
+		eth_client
+			.submit_transaction(eth_tx_signed)
+			.await
+			.map_err(|err| format!("error submitting transaction: {:?}", err))?;
+
+		Ok(eth_tx_unsigned)
+	}
+	.await;
+
+	match result {
+		Ok(eth_tx_unsigned) => {
+			log::info!(
+				target: "bridge",
+				"Exchange transaction has been submitted to Ethereum node: {:?}",
+				eth_tx_unsigned,
+			);
+		}
+		Err(err) => {
+			log::error!(
+				target: "bridge",
+				"Error submitting exchange transaction to Ethereum node: {}",
+				err,
+			);
+		}
+	}
+}