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// This file is part of Substrate.

// Copyright (C) Parity Technologies (UK) Ltd.
// SPDX-License-Identifier: Apache-2.0

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 	http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//! Utilities for working with Ethereum accounts.
use crate::{
	evm::{TransactionLegacySigned, TransactionLegacyUnsigned},
	H160,
};
use rlp::Encodable;

/// A simple account that can sign transactions
pub struct Account(subxt_signer::eth::Keypair);

impl Default for Account {
	fn default() -> Self {
		Self(subxt_signer::eth::dev::alith())
	}
}

impl From<subxt_signer::eth::Keypair> for Account {
	fn from(kp: subxt_signer::eth::Keypair) -> Self {
		Self(kp)
	}
}

impl Account {
	/// Get the [`H160`] address of the account.
	pub fn address(&self) -> H160 {
		H160::from_slice(&self.0.account_id().as_ref())
	}

	/// Sign a transaction.
	pub fn sign_transaction(&self, tx: TransactionLegacyUnsigned) -> TransactionLegacySigned {
		let rlp_encoded = tx.rlp_bytes();
		let signature = self.0.sign(&rlp_encoded);
		TransactionLegacySigned::from(tx, signature.as_ref())
	}
}