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<span class='comment'>// Copyright 2015-2017 Parity Technologies (UK) Ltd.</span>
<span class='comment'>// This file is part of Parity.</span>

<span class='comment'>// Parity is free software: you can redistribute it and/or modify</span>
<span class='comment'>// it under the terms of the GNU General Public License as published by</span>
<span class='comment'>// the Free Software Foundation, either version 3 of the License, or</span>
<span class='comment'>// (at your option) any later version.</span>

<span class='comment'>// Parity is distributed in the hope that it will be useful,</span>
<span class='comment'>// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class='comment'>// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span>
<span class='comment'>// GNU General Public License for more details.</span>

<span class='comment'>// You should have received a copy of the GNU General Public License</span>
<span class='comment'>// along with Parity.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span>

<span class='doccomment'>//! View onto transaction rlp</span>
<span class='kw'>use</span> <span class='ident'>util</span>::{<span class='ident'>U256</span>, <span class='ident'>Bytes</span>, <span class='ident'>Hashable</span>, <span class='ident'>H256</span>};
<span class='kw'>use</span> <span class='ident'>rlp</span>::{<span class='ident'>Rlp</span>, <span class='ident'>View</span>};

<span class='doccomment'>/// View onto transaction rlp.</span>
<span class='kw'>pub</span> <span class='kw'>struct</span> <span class='ident'>TransactionView</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
	<span class='ident'>rlp</span>: <span class='ident'>Rlp</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span>
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> <span class='ident'>TransactionView</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
	<span class='doccomment'>/// Creates new view onto block from raw bytes.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new</span>(<span class='ident'>bytes</span>: <span class='kw-2'>&amp;</span><span class='lifetime'>&#39;a</span> [<span class='ident'>u8</span>]) <span class='op'>-&gt;</span> <span class='ident'>TransactionView</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
		<span class='ident'>TransactionView</span> {
			<span class='ident'>rlp</span>: <span class='ident'>Rlp</span>::<span class='ident'>new</span>(<span class='ident'>bytes</span>)
		}
	}

	<span class='doccomment'>/// Creates new view onto block from rlp.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>new_from_rlp</span>(<span class='ident'>rlp</span>: <span class='ident'>Rlp</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span>) <span class='op'>-&gt;</span> <span class='ident'>TransactionView</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
		<span class='ident'>TransactionView</span> {
			<span class='ident'>rlp</span>: <span class='ident'>rlp</span>
		}
	}

	<span class='doccomment'>/// Return reference to underlaying rlp.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>rlp</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='kw-2'>&amp;</span><span class='ident'>Rlp</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
		<span class='kw-2'>&amp;</span><span class='self'>self</span>.<span class='ident'>rlp</span>
	}

	<span class='doccomment'>/// Get the nonce field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>nonce</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>U256</span> { <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>0</span>) }

	<span class='doccomment'>/// Get the gas_price field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>gas_price</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>U256</span> { <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>1</span>) }

	<span class='doccomment'>/// Get the gas field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>gas</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>U256</span> { <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>2</span>) }

	<span class='doccomment'>/// Get the value field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>value</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>U256</span> { <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>4</span>) }

	<span class='doccomment'>/// Get the data field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>data</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>Bytes</span> { <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>5</span>) }

	<span class='doccomment'>/// Get the v field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>v</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>u8</span> { <span class='kw'>let</span> <span class='ident'>r</span>: <span class='ident'>u16</span> <span class='op'>=</span> <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>6</span>); <span class='ident'>r</span> <span class='kw'>as</span> <span class='ident'>u8</span> }

	<span class='doccomment'>/// Get the r field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>r</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>U256</span> { <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>7</span>) }

	<span class='doccomment'>/// Get the s field of the transaction.</span>
	<span class='kw'>pub</span> <span class='kw'>fn</span> <span class='ident'>s</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>U256</span> { <span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>val_at</span>(<span class='number'>8</span>) }
}

<span class='kw'>impl</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> <span class='ident'>Hashable</span> <span class='kw'>for</span> <span class='ident'>TransactionView</span><span class='op'>&lt;</span><span class='lifetime'>&#39;a</span><span class='op'>&gt;</span> {
	<span class='kw'>fn</span> <span class='ident'>sha3</span>(<span class='kw-2'>&amp;</span><span class='self'>self</span>) <span class='op'>-&gt;</span> <span class='ident'>H256</span> {
		<span class='self'>self</span>.<span class='ident'>rlp</span>.<span class='ident'>as_raw</span>().<span class='ident'>sha3</span>()
	}
}

<span class='attribute'>#[<span class='ident'>cfg</span>(<span class='ident'>test</span>)]</span>
<span class='kw'>mod</span> <span class='ident'>tests</span> {
	<span class='kw'>use</span> <span class='ident'>std</span>::<span class='ident'>str</span>::<span class='ident'>FromStr</span>;
	<span class='kw'>use</span> <span class='ident'>rustc_serialize</span>::<span class='ident'>hex</span>::<span class='ident'>FromHex</span>;
	<span class='kw'>use</span> <span class='ident'>util</span>::<span class='ident'>U256</span>;
	<span class='kw'>use</span> <span class='kw'>super</span>::<span class='ident'>TransactionView</span>;

	<span class='attribute'>#[<span class='ident'>test</span>]</span>
	<span class='kw'>fn</span> <span class='ident'>test_transaction_view</span>() {
		<span class='kw'>let</span> <span class='ident'>rlp</span> <span class='op'>=</span> <span class='string'>&quot;f87c80018261a894095e7baea6a6c7c4c2dfeb977efac326af552d870a9d00000000000000000000000000000000000000000000000000000000001ba048b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353a0efffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>();

		<span class='kw'>let</span> <span class='ident'>view</span> <span class='op'>=</span> <span class='ident'>TransactionView</span>::<span class='ident'>new</span>(<span class='kw-2'>&amp;</span><span class='ident'>rlp</span>);
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>nonce</span>(), <span class='ident'>U256</span>::<span class='ident'>from</span>(<span class='number'>0</span>));
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>gas_price</span>(), <span class='ident'>U256</span>::<span class='ident'>from</span>(<span class='number'>1</span>));
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>gas</span>(), <span class='ident'>U256</span>::<span class='ident'>from</span>(<span class='number'>0x61a8</span>));
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>value</span>(), <span class='ident'>U256</span>::<span class='ident'>from</span>(<span class='number'>0xa</span>));
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>data</span>(), <span class='string'>&quot;0000000000000000000000000000000000000000000000000000000000&quot;</span>.<span class='ident'>from_hex</span>().<span class='ident'>unwrap</span>());
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>r</span>(), <span class='ident'>U256</span>::<span class='ident'>from_str</span>(<span class='string'>&quot;48b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353&quot;</span>).<span class='ident'>unwrap</span>());
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>s</span>(), <span class='ident'>U256</span>::<span class='ident'>from_str</span>(<span class='string'>&quot;efffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804&quot;</span>).<span class='ident'>unwrap</span>());
		<span class='macro'>assert_eq</span><span class='macro'>!</span>(<span class='ident'>view</span>.<span class='ident'>v</span>(), <span class='number'>0x1b</span>);
	}
}
</pre>
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