745 lines
24 KiB
Rust
745 lines
24 KiB
Rust
// Copyright 2015-2020 Parity Technologies (UK) Ltd.
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// This file is part of OpenEthereum.
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// OpenEthereum is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// OpenEthereum is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with OpenEthereum. If not, see <http://www.gnu.org/licenses/>.
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//! Transaction data structure.
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use std::ops::Deref;
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use ethereum_types::{Address, H160, H256, U256};
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use ethjson;
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use ethkey::{self, public_to_address, recover, Public, Secret, Signature};
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use hash::keccak;
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use heapsize::HeapSizeOf;
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use rlp::{self, DecoderError, Encodable, Rlp, RlpStream};
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use transaction::error;
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type Bytes = Vec<u8>;
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type BlockNumber = u64;
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/// Fake address for unsigned transactions as defined by EIP-86.
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pub const UNSIGNED_SENDER: Address = H160([0xff; 20]);
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/// System sender address for internal state updates.
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pub const SYSTEM_ADDRESS: Address = H160([
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xfe,
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]);
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/// Transaction action type.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum Action {
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/// Create creates new contract.
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Create,
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/// Calls contract at given address.
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/// In the case of a transfer, this is the receiver's address.'
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Call(Address),
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}
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impl Default for Action {
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fn default() -> Action {
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Action::Create
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}
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}
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impl rlp::Decodable for Action {
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fn decode(rlp: &Rlp) -> Result<Self, DecoderError> {
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if rlp.is_empty() {
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if rlp.is_data() {
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Ok(Action::Create)
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} else {
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Err(DecoderError::RlpExpectedToBeData)
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}
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} else {
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Ok(Action::Call(rlp.as_val()?))
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}
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}
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}
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impl rlp::Encodable for Action {
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fn rlp_append(&self, s: &mut RlpStream) {
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match *self {
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Action::Create => s.append_internal(&""),
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Action::Call(ref addr) => s.append_internal(addr),
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};
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}
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}
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/// Transaction activation condition.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum Condition {
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/// Valid at this block number or later.
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Number(BlockNumber),
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/// Valid at this unix time or later.
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Timestamp(u64),
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}
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/// Replay protection logic for v part of transaction's signature
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pub mod signature {
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/// Adds chain id into v
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pub fn add_chain_replay_protection(v: u64, chain_id: Option<u64>) -> u64 {
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v + if let Some(n) = chain_id {
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35 + n * 2
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} else {
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27
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}
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}
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/// Returns refined v
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/// 0 if `v` would have been 27 under "Electrum" notation, 1 if 28 or 4 if invalid.
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pub fn check_replay_protection(v: u64) -> u8 {
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match v {
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v if v == 27 => 0,
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v if v == 28 => 1,
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v if v >= 35 => ((v - 1) % 2) as u8,
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_ => 4,
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}
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}
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}
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/// A set of information describing an externally-originating message call
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/// or contract creation operation.
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#[derive(Default, Debug, Clone, PartialEq, Eq)]
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pub struct Transaction {
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/// Nonce.
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pub nonce: U256,
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/// Gas price.
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pub gas_price: U256,
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/// Gas paid up front for transaction execution.
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pub gas: U256,
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/// Action, can be either call or contract create.
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pub action: Action,
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/// Transfered value.
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pub value: U256,
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/// Transaction data.
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pub data: Bytes,
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}
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impl Transaction {
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/// Append object with a without signature into RLP stream
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pub fn rlp_append_unsigned_transaction(&self, s: &mut RlpStream, chain_id: Option<u64>) {
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s.begin_list(if chain_id.is_none() { 6 } else { 9 });
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s.append(&self.nonce);
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s.append(&self.gas_price);
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s.append(&self.gas);
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s.append(&self.action);
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s.append(&self.value);
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s.append(&self.data);
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if let Some(n) = chain_id {
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s.append(&n);
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s.append(&0u8);
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s.append(&0u8);
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}
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}
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}
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impl HeapSizeOf for Transaction {
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fn heap_size_of_children(&self) -> usize {
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self.data.heap_size_of_children()
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}
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}
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#[cfg(any(test, feature = "test-helpers"))]
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impl From<ethjson::state::Transaction> for SignedTransaction {
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fn from(t: ethjson::state::Transaction) -> Self {
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let to: Option<ethjson::hash::Address> = t.to.into();
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let secret = t.secret.map(|s| Secret::from(s.0));
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let tx = Transaction {
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nonce: t.nonce.into(),
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gas_price: t.gas_price.into(),
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gas: t.gas_limit.into(),
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action: match to {
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Some(to) => Action::Call(to.into()),
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None => Action::Create,
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},
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value: t.value.into(),
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data: t.data.into(),
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};
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match secret {
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Some(s) => tx.sign(&s, None),
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None => tx.null_sign(1),
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}
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}
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}
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impl From<ethjson::transaction::Transaction> for UnverifiedTransaction {
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fn from(t: ethjson::transaction::Transaction) -> Self {
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let to: Option<ethjson::hash::Address> = t.to.into();
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UnverifiedTransaction {
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unsigned: Transaction {
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nonce: t.nonce.into(),
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gas_price: t.gas_price.into(),
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gas: t.gas_limit.into(),
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action: match to {
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Some(to) => Action::Call(to.into()),
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None => Action::Create,
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},
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value: t.value.into(),
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data: t.data.into(),
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},
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r: t.r.into(),
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s: t.s.into(),
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v: t.v.into(),
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hash: 0.into(),
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}
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.compute_hash()
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}
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}
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impl Transaction {
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/// The message hash of the transaction.
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pub fn hash(&self, chain_id: Option<u64>) -> H256 {
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let mut stream = RlpStream::new();
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self.rlp_append_unsigned_transaction(&mut stream, chain_id);
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keccak(stream.as_raw())
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}
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/// Signs the transaction as coming from `sender`.
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pub fn sign(self, secret: &Secret, chain_id: Option<u64>) -> SignedTransaction {
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let sig = ::ethkey::sign(secret, &self.hash(chain_id))
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.expect("data is valid and context has signing capabilities; qed");
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SignedTransaction::new(self.with_signature(sig, chain_id))
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.expect("secret is valid so it's recoverable")
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}
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/// Signs the transaction with signature.
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pub fn with_signature(self, sig: Signature, chain_id: Option<u64>) -> UnverifiedTransaction {
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UnverifiedTransaction {
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unsigned: self,
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r: sig.r().into(),
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s: sig.s().into(),
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v: signature::add_chain_replay_protection(sig.v() as u64, chain_id),
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hash: 0.into(),
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}
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.compute_hash()
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}
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/// Useful for test incorrectly signed transactions.
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#[cfg(test)]
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pub fn invalid_sign(self) -> UnverifiedTransaction {
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UnverifiedTransaction {
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unsigned: self,
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r: U256::one(),
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s: U256::one(),
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v: 0,
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hash: 0.into(),
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}
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.compute_hash()
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}
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/// Specify the sender; this won't survive the serialize/deserialize process, but can be cloned.
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pub fn fake_sign(self, from: Address) -> SignedTransaction {
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SignedTransaction {
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transaction: UnverifiedTransaction {
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unsigned: self,
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r: U256::one(),
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s: U256::one(),
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v: 0,
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hash: 0.into(),
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}
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.compute_hash(),
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sender: from,
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public: None,
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}
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}
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/// Legacy EIP-86 compatible empty signature.
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/// This method is used in json tests as well as
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/// signature verification tests.
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#[cfg(any(test, feature = "test-helpers"))]
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pub fn null_sign(self, chain_id: u64) -> SignedTransaction {
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SignedTransaction {
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transaction: UnverifiedTransaction {
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unsigned: self,
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r: U256::zero(),
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s: U256::zero(),
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v: chain_id,
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hash: 0.into(),
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}
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.compute_hash(),
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sender: UNSIGNED_SENDER,
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public: None,
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}
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}
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}
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/// Signed transaction information without verified signature.
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#[derive(Debug, Clone, Eq, PartialEq)]
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pub struct UnverifiedTransaction {
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/// Plain Transaction.
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unsigned: Transaction,
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/// The V field of the signature; the LS bit described which half of the curve our point falls
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/// in. The MS bits describe which chain this transaction is for. If 27/28, its for all chains.
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v: u64,
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/// The R field of the signature; helps describe the point on the curve.
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r: U256,
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/// The S field of the signature; helps describe the point on the curve.
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s: U256,
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/// Hash of the transaction
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hash: H256,
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}
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impl HeapSizeOf for UnverifiedTransaction {
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fn heap_size_of_children(&self) -> usize {
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self.unsigned.heap_size_of_children()
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}
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}
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impl Deref for UnverifiedTransaction {
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type Target = Transaction;
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fn deref(&self) -> &Self::Target {
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&self.unsigned
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}
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}
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impl rlp::Decodable for UnverifiedTransaction {
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fn decode(d: &Rlp) -> Result<Self, DecoderError> {
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if d.item_count()? != 9 {
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return Err(DecoderError::RlpIncorrectListLen);
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}
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let hash = keccak(d.as_raw());
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Ok(UnverifiedTransaction {
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unsigned: Transaction {
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nonce: d.val_at(0)?,
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gas_price: d.val_at(1)?,
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gas: d.val_at(2)?,
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action: d.val_at(3)?,
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value: d.val_at(4)?,
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data: d.val_at(5)?,
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},
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v: d.val_at(6)?,
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r: d.val_at(7)?,
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s: d.val_at(8)?,
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hash,
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})
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}
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}
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impl rlp::Encodable for UnverifiedTransaction {
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fn rlp_append(&self, s: &mut RlpStream) {
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self.rlp_append_sealed_transaction(s)
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}
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}
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impl UnverifiedTransaction {
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/// Used to compute hash of created transactions
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fn compute_hash(mut self) -> UnverifiedTransaction {
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let hash = keccak(&*self.rlp_bytes());
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self.hash = hash;
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self
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}
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/// Checks if the signature is empty.
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pub fn is_unsigned(&self) -> bool {
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self.r.is_zero() && self.s.is_zero()
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}
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/// Append object with a signature into RLP stream
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fn rlp_append_sealed_transaction(&self, s: &mut RlpStream) {
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s.begin_list(9);
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s.append(&self.nonce);
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s.append(&self.gas_price);
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s.append(&self.gas);
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s.append(&self.action);
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s.append(&self.value);
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s.append(&self.data);
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s.append(&self.v);
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s.append(&self.r);
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s.append(&self.s);
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}
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/// Reference to unsigned part of this transaction.
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pub fn as_unsigned(&self) -> &Transaction {
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&self.unsigned
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}
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/// Returns standardized `v` value (0, 1 or 4 (invalid))
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pub fn standard_v(&self) -> u8 {
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signature::check_replay_protection(self.v)
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}
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/// The `v` value that appears in the RLP.
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pub fn original_v(&self) -> u64 {
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self.v
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}
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/// The chain ID, or `None` if this is a global transaction.
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pub fn chain_id(&self) -> Option<u64> {
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match self.v {
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v if self.is_unsigned() => Some(v),
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v if v >= 35 => Some((v - 35) / 2),
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_ => None,
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}
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}
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/// Construct a signature object from the sig.
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pub fn signature(&self) -> Signature {
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Signature::from_rsv(&self.r.into(), &self.s.into(), self.standard_v())
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}
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/// Checks whether the signature has a low 's' value.
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pub fn check_low_s(&self) -> Result<(), ethkey::Error> {
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if !self.signature().is_low_s() {
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Err(ethkey::Error::InvalidSignature.into())
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} else {
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Ok(())
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}
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}
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/// Get the hash of this transaction (keccak of the RLP).
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pub fn hash(&self) -> H256 {
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self.hash
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}
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/// Recovers the public key of the sender.
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pub fn recover_public(&self) -> Result<Public, ethkey::Error> {
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Ok(recover(
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&self.signature(),
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&self.unsigned.hash(self.chain_id()),
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)?)
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}
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/// Verify basic signature params. Does not attempt sender recovery.
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pub fn verify_basic(
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&self,
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check_low_s: bool,
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chain_id: Option<u64>,
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) -> Result<(), error::Error> {
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if self.is_unsigned() {
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return Err(ethkey::Error::InvalidSignature.into());
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}
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if check_low_s {
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self.check_low_s()?;
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}
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match (self.chain_id(), chain_id) {
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(None, _) => {}
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(Some(n), Some(m)) if n == m => {}
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_ => return Err(error::Error::InvalidChainId),
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};
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Ok(())
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}
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}
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/// A `UnverifiedTransaction` with successfully recovered `sender`.
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#[derive(Debug, Clone, Eq, PartialEq)]
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pub struct SignedTransaction {
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transaction: UnverifiedTransaction,
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sender: Address,
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public: Option<Public>,
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}
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impl HeapSizeOf for SignedTransaction {
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fn heap_size_of_children(&self) -> usize {
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self.transaction.heap_size_of_children()
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}
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}
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impl rlp::Encodable for SignedTransaction {
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fn rlp_append(&self, s: &mut RlpStream) {
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self.transaction.rlp_append_sealed_transaction(s)
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}
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}
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impl Deref for SignedTransaction {
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type Target = UnverifiedTransaction;
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fn deref(&self) -> &Self::Target {
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&self.transaction
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}
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}
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impl From<SignedTransaction> for UnverifiedTransaction {
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fn from(tx: SignedTransaction) -> Self {
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tx.transaction
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}
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}
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impl SignedTransaction {
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// t_nb 5.3.1 Try to verify transaction and recover sender.
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pub fn new(transaction: UnverifiedTransaction) -> Result<Self, ethkey::Error> {
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if transaction.is_unsigned() {
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return Err(ethkey::Error::InvalidSignature);
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}
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let public = transaction.recover_public()?;
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let sender = public_to_address(&public);
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Ok(SignedTransaction {
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transaction,
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sender,
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public: Some(public),
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})
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}
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/// Returns transaction sender.
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pub fn sender(&self) -> Address {
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self.sender
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}
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/// Returns a public key of the sender.
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pub fn public_key(&self) -> Option<Public> {
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self.public
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}
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/// Checks is signature is empty.
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pub fn is_unsigned(&self) -> bool {
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self.transaction.is_unsigned()
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}
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/// Deconstructs this transaction back into `UnverifiedTransaction`
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pub fn deconstruct(self) -> (UnverifiedTransaction, Address, Option<Public>) {
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(self.transaction, self.sender, self.public)
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}
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}
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/// Signed Transaction that is a part of canon blockchain.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct LocalizedTransaction {
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/// Signed part.
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pub signed: UnverifiedTransaction,
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/// Block number.
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pub block_number: BlockNumber,
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/// Block hash.
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pub block_hash: H256,
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/// Transaction index within block.
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pub transaction_index: usize,
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/// Cached sender
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pub cached_sender: Option<Address>,
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}
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impl LocalizedTransaction {
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/// Returns transaction sender.
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/// Panics if `LocalizedTransaction` is constructed using invalid `UnverifiedTransaction`.
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pub fn sender(&mut self) -> Address {
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if let Some(sender) = self.cached_sender {
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return sender;
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}
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if self.is_unsigned() {
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return UNSIGNED_SENDER.clone();
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}
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let sender = public_to_address(&self.recover_public()
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.expect("LocalizedTransaction is always constructed from transaction from blockchain; Blockchain only stores verified transactions; qed"));
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self.cached_sender = Some(sender);
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sender
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}
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}
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impl Deref for LocalizedTransaction {
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type Target = UnverifiedTransaction;
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fn deref(&self) -> &Self::Target {
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&self.signed
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}
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}
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/// Queued transaction with additional information.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct PendingTransaction {
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/// Signed transaction data.
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pub transaction: SignedTransaction,
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/// To be activated at this condition. `None` for immediately.
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pub condition: Option<Condition>,
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}
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impl PendingTransaction {
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/// Create a new pending transaction from signed transaction.
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pub fn new(signed: SignedTransaction, condition: Option<Condition>) -> Self {
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PendingTransaction {
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transaction: signed,
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condition: condition,
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}
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}
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}
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impl Deref for PendingTransaction {
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type Target = SignedTransaction;
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fn deref(&self) -> &SignedTransaction {
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&self.transaction
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}
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}
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impl From<SignedTransaction> for PendingTransaction {
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fn from(t: SignedTransaction) -> Self {
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PendingTransaction {
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transaction: t,
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condition: None,
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}
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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use ethereum_types::U256;
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use hash::keccak;
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#[test]
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fn sender_test() {
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let bytes = ::rustc_hex::FromHex::from_hex("f85f800182520894095e7baea6a6c7c4c2dfeb977efac326af552d870a801ba048b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353a0efffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804").unwrap();
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let t: UnverifiedTransaction =
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rlp::decode(&bytes).expect("decoding UnverifiedTransaction failed");
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assert_eq!(t.data, b"");
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assert_eq!(t.gas, U256::from(0x5208u64));
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assert_eq!(t.gas_price, U256::from(0x01u64));
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assert_eq!(t.nonce, U256::from(0x00u64));
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if let Action::Call(ref to) = t.action {
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assert_eq!(*to, "095e7baea6a6c7c4c2dfeb977efac326af552d87".into());
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} else {
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panic!();
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}
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assert_eq!(t.value, U256::from(0x0au64));
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assert_eq!(
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public_to_address(&t.recover_public().unwrap()),
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"0f65fe9276bc9a24ae7083ae28e2660ef72df99e".into()
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);
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assert_eq!(t.chain_id(), None);
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}
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#[test]
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fn empty_atom_as_create_action() {
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let empty_atom = [0x80];
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let action: Action = rlp::decode(&empty_atom).unwrap();
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assert_eq!(action, Action::Create);
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}
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#[test]
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fn empty_list_as_create_action_rejected() {
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let empty_list = [0xc0];
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let action: Result<Action, DecoderError> = rlp::decode(&empty_list);
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assert_eq!(action, Err(DecoderError::RlpExpectedToBeData));
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}
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#[test]
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fn signing_eip155_zero_chainid() {
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use ethkey::{Generator, Random};
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let key = Random.generate().unwrap();
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let t = Transaction {
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action: Action::Create,
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nonce: U256::from(42),
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gas_price: U256::from(3000),
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gas: U256::from(50_000),
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value: U256::from(1),
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data: b"Hello!".to_vec(),
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};
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let hash = t.hash(Some(0));
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let sig = ::ethkey::sign(&key.secret(), &hash).unwrap();
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let u = t.with_signature(sig, Some(0));
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assert!(SignedTransaction::new(u).is_ok());
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}
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#[test]
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fn signing() {
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use ethkey::{Generator, Random};
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|
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let key = Random.generate().unwrap();
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let t = Transaction {
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action: Action::Create,
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nonce: U256::from(42),
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gas_price: U256::from(3000),
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gas: U256::from(50_000),
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value: U256::from(1),
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data: b"Hello!".to_vec(),
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}
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.sign(&key.secret(), None);
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assert_eq!(Address::from(keccak(key.public())), t.sender());
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assert_eq!(t.chain_id(), None);
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}
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|
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#[test]
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fn fake_signing() {
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let t = Transaction {
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action: Action::Create,
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nonce: U256::from(42),
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gas_price: U256::from(3000),
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gas: U256::from(50_000),
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value: U256::from(1),
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data: b"Hello!".to_vec(),
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}
|
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.fake_sign(Address::from(0x69));
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assert_eq!(Address::from(0x69), t.sender());
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assert_eq!(t.chain_id(), None);
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|
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let t = t.clone();
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assert_eq!(Address::from(0x69), t.sender());
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assert_eq!(t.chain_id(), None);
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}
|
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|
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#[test]
|
|
fn should_reject_null_signature() {
|
|
use std::str::FromStr;
|
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let t = Transaction {
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nonce: U256::zero(),
|
|
gas_price: U256::from(10000000000u64),
|
|
gas: U256::from(21000),
|
|
action: Action::Call(
|
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Address::from_str("d46e8dd67c5d32be8058bb8eb970870f07244567").unwrap(),
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|
),
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|
value: U256::from(1),
|
|
data: vec![],
|
|
}
|
|
.null_sign(1);
|
|
|
|
let res = SignedTransaction::new(t.transaction);
|
|
match res {
|
|
Err(ethkey::Error::InvalidSignature) => {}
|
|
_ => panic!("null signature should be rejected"),
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn should_recover_from_chain_specific_signing() {
|
|
use ethkey::{Generator, Random};
|
|
let key = Random.generate().unwrap();
|
|
let t = Transaction {
|
|
action: Action::Create,
|
|
nonce: U256::from(42),
|
|
gas_price: U256::from(3000),
|
|
gas: U256::from(50_000),
|
|
value: U256::from(1),
|
|
data: b"Hello!".to_vec(),
|
|
}
|
|
.sign(&key.secret(), Some(69));
|
|
assert_eq!(Address::from(keccak(key.public())), t.sender());
|
|
assert_eq!(t.chain_id(), Some(69));
|
|
}
|
|
|
|
#[test]
|
|
fn should_agree_with_vitalik() {
|
|
use rustc_hex::FromHex;
|
|
|
|
let test_vector = |tx_data: &str, address: &'static str| {
|
|
let signed =
|
|
rlp::decode(&FromHex::from_hex(tx_data).unwrap()).expect("decoding tx data failed");
|
|
let signed = SignedTransaction::new(signed).unwrap();
|
|
assert_eq!(signed.sender(), address.into());
|
|
println!("chainid: {:?}", signed.chain_id());
|
|
};
|
|
|
|
test_vector("f864808504a817c800825208943535353535353535353535353535353535353535808025a0044852b2a670ade5407e78fb2863c51de9fcb96542a07186fe3aeda6bb8a116da0044852b2a670ade5407e78fb2863c51de9fcb96542a07186fe3aeda6bb8a116d", "0xf0f6f18bca1b28cd68e4357452947e021241e9ce");
|
|
test_vector("f864018504a817c80182a410943535353535353535353535353535353535353535018025a0489efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bcaa0489efdaa54c0f20c7adf612882df0950f5a951637e0307cdcb4c672f298b8bc6", "0x23ef145a395ea3fa3deb533b8a9e1b4c6c25d112");
|
|
test_vector("f864028504a817c80282f618943535353535353535353535353535353535353535088025a02d7c5bef027816a800da1736444fb58a807ef4c9603b7848673f7e3a68eb14a5a02d7c5bef027816a800da1736444fb58a807ef4c9603b7848673f7e3a68eb14a5", "0x2e485e0c23b4c3c542628a5f672eeab0ad4888be");
|
|
test_vector("f865038504a817c803830148209435353535353535353535353535353535353535351b8025a02a80e1ef1d7842f27f2e6be0972bb708b9a135c38860dbe73c27c3486c34f4e0a02a80e1ef1d7842f27f2e6be0972bb708b9a135c38860dbe73c27c3486c34f4de", "0x82a88539669a3fd524d669e858935de5e5410cf0");
|
|
test_vector("f865048504a817c80483019a28943535353535353535353535353535353535353535408025a013600b294191fc92924bb3ce4b969c1e7e2bab8f4c93c3fc6d0a51733df3c063a013600b294191fc92924bb3ce4b969c1e7e2bab8f4c93c3fc6d0a51733df3c060", "0xf9358f2538fd5ccfeb848b64a96b743fcc930554");
|
|
test_vector("f865058504a817c8058301ec309435353535353535353535353535353535353535357d8025a04eebf77a833b30520287ddd9478ff51abbdffa30aa90a8d655dba0e8a79ce0c1a04eebf77a833b30520287ddd9478ff51abbdffa30aa90a8d655dba0e8a79ce0c1", "0xa8f7aba377317440bc5b26198a363ad22af1f3a4");
|
|
test_vector("f866068504a817c80683023e3894353535353535353535353535353535353535353581d88025a06455bf8ea6e7463a1046a0b52804526e119b4bf5136279614e0b1e8e296a4e2fa06455bf8ea6e7463a1046a0b52804526e119b4bf5136279614e0b1e8e296a4e2d", "0xf1f571dc362a0e5b2696b8e775f8491d3e50de35");
|
|
test_vector("f867078504a817c807830290409435353535353535353535353535353535353535358201578025a052f1a9b320cab38e5da8a8f97989383aab0a49165fc91c737310e4f7e9821021a052f1a9b320cab38e5da8a8f97989383aab0a49165fc91c737310e4f7e9821021", "0xd37922162ab7cea97c97a87551ed02c9a38b7332");
|
|
test_vector("f867088504a817c8088302e2489435353535353535353535353535353535353535358202008025a064b1702d9298fee62dfeccc57d322a463ad55ca201256d01f62b45b2e1c21c12a064b1702d9298fee62dfeccc57d322a463ad55ca201256d01f62b45b2e1c21c10", "0x9bddad43f934d313c2b79ca28a432dd2b7281029");
|
|
test_vector("f867098504a817c809830334509435353535353535353535353535353535353535358202d98025a052f8f61201b2b11a78d6e866abc9c3db2ae8631fa656bfe5cb53668255367afba052f8f61201b2b11a78d6e866abc9c3db2ae8631fa656bfe5cb53668255367afb", "0x3c24d7329e92f84f08556ceb6df1cdb0104ca49f");
|
|
}
|
|
}
|