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eth.rs
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eth.rs
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/******************************************************************************
* Copyright © 2022 Atomic Private Limited and its contributors *
* *
* See the CONTRIBUTOR-LICENSE-AGREEMENT, COPYING, LICENSE-COPYRIGHT-NOTICE *
* and DEVELOPER-CERTIFICATE-OF-ORIGIN files in the LEGAL directory in *
* the top-level directory of this distribution for the individual copyright *
* holder information and the developer policies on copyright and licensing. *
* *
* Unless otherwise agreed in a custom licensing agreement, no part of the *
* AtomicDEX software, including this file may be copied, modified, propagated*
* or distributed except according to the terms contained in the *
* LICENSE-COPYRIGHT-NOTICE file. *
* *
* Removal or modification of this copyright notice is prohibited. *
* *
******************************************************************************/
//
// eth.rs
// marketmaker
//
// Copyright © 2022 AtomicDEX. All rights reserved.
//
use async_trait::async_trait;
use bitcrypto::{keccak256, sha256};
use common::executor::Timer;
use common::log::{error, info, warn};
use common::{now_ms, small_rng, DEX_FEE_ADDR_RAW_PUBKEY};
use crypto::privkey::key_pair_from_secret;
use derive_more::Display;
use ethabi::{Contract, Token};
pub use ethcore_transaction::SignedTransaction as SignedEthTx;
use ethcore_transaction::{Action, Transaction as UnSignedEthTx, UnverifiedTransaction};
use ethereum_types::{Address, H160, H256, U256};
use ethkey::{public_to_address, KeyPair, Public, Signature};
use ethkey::{sign, verify_address};
use futures::compat::Future01CompatExt;
use futures::future::{join_all, select, Either, FutureExt, TryFutureExt};
use futures01::Future;
use http::StatusCode;
use mm2_core::mm_ctx::{MmArc, MmWeak};
use mm2_err_handle::prelude::*;
use mm2_net::transport::{slurp_url, SlurpError};
use mm2_number::{BigDecimal, MmNumber};
#[cfg(test)] use mocktopus::macros::*;
use rand::seq::SliceRandom;
use rpc::v1::types::Bytes as BytesJson;
use secp256k1::PublicKey;
use serde_json::{self as json, Value as Json};
use serialization::{CompactInteger, Serializable, Stream};
use sha3::{Digest, Keccak256};
use std::collections::HashMap;
use std::ops::Deref;
use std::path::PathBuf;
use std::str::FromStr;
use std::sync::atomic::{AtomicU64, Ordering as AtomicOrdering};
use std::sync::{Arc, Mutex};
use web3::types::{Action as TraceAction, BlockId, BlockNumber, Bytes, CallRequest, FilterBuilder, Log, Trace,
TraceFilterBuilder, Transaction as Web3Transaction, TransactionId};
use web3::{self, Web3};
use web3_transport::{EthFeeHistoryNamespace, Web3Transport};
use super::{AsyncMutex, BalanceError, BalanceFut, CoinBalance, CoinProtocol, CoinTransportMetrics, CoinsContext,
FeeApproxStage, FoundSwapTxSpend, HistorySyncState, MarketCoinOps, MmCoin, NegotiateSwapContractAddrErr,
NumConversError, NumConversResult, RawTransactionError, RawTransactionFut, RawTransactionRequest,
RawTransactionRes, RawTransactionResult, RpcClientType, RpcTransportEventHandler,
RpcTransportEventHandlerShared, SearchForSwapTxSpendInput, SignatureError, SignatureResult, SwapOps,
TradeFee, TradePreimageError, TradePreimageFut, TradePreimageResult, TradePreimageValue, Transaction,
TransactionDetails, TransactionEnum, TransactionErr, TransactionFut, UnexpectedDerivationMethod,
ValidateAddressResult, ValidatePaymentInput, VerificationError, VerificationResult, WithdrawError,
WithdrawFee, WithdrawFut, WithdrawRequest, WithdrawResult};
pub use rlp;
#[cfg(test)] mod eth_tests;
#[cfg(target_arch = "wasm32")] mod eth_wasm_tests;
mod web3_transport;
/// https://github.com/artemii235/etomic-swap/blob/master/contracts/EtomicSwap.sol
/// Dev chain (195.201.0.6:8565) contract address: 0xa09ad3cd7e96586ebd05a2607ee56b56fb2db8fd
/// Ropsten: https://ropsten.etherscan.io/address/0x7bc1bbdd6a0a722fc9bffc49c921b685ecb84b94
/// ETH mainnet: https://etherscan.io/address/0x8500AFc0bc5214728082163326C2FF0C73f4a871
const SWAP_CONTRACT_ABI: &str = r#"[{"constant":false,"inputs":[{"name":"_id","type":"bytes32"},{"name":"_amount","type":"uint256"},{"name":"_secret","type":"bytes32"},{"name":"_tokenAddress","type":"address"},{"name":"_sender","type":"address"}],"name":"receiverSpend","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"bytes32"}],"name":"payments","outputs":[{"name":"paymentHash","type":"bytes20"},{"name":"lockTime","type":"uint64"},{"name":"state","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_id","type":"bytes32"},{"name":"_receiver","type":"address"},{"name":"_secretHash","type":"bytes20"},{"name":"_lockTime","type":"uint64"}],"name":"ethPayment","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":false,"inputs":[{"name":"_id","type":"bytes32"},{"name":"_amount","type":"uint256"},{"name":"_paymentHash","type":"bytes20"},{"name":"_tokenAddress","type":"address"},{"name":"_receiver","type":"address"}],"name":"senderRefund","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_id","type":"bytes32"},{"name":"_amount","type":"uint256"},{"name":"_tokenAddress","type":"address"},{"name":"_receiver","type":"address"},{"name":"_secretHash","type":"bytes20"},{"name":"_lockTime","type":"uint64"}],"name":"erc20Payment","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"name":"id","type":"bytes32"}],"name":"PaymentSent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"id","type":"bytes32"},{"indexed":false,"name":"secret","type":"bytes32"}],"name":"ReceiverSpent","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"id","type":"bytes32"}],"name":"SenderRefunded","type":"event"}]"#;
/// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
const ERC20_ABI: &str = r#"[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_from","type":"address"},{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_subtractedValue","type":"uint256"}],"name":"decreaseApproval","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"balance","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_to","type":"address"},{"name":"_value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_spender","type":"address"},{"name":"_addedValue","type":"uint256"}],"name":"increaseApproval","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"_owner","type":"address"},{"name":"_spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"}]"#;
/// Payment states from etomic swap smart contract: https://github.com/artemii235/etomic-swap/blob/master/contracts/EtomicSwap.sol#L5
pub const PAYMENT_STATE_UNINITIALIZED: u8 = 0;
pub const PAYMENT_STATE_SENT: u8 = 1;
const _PAYMENT_STATE_SPENT: u8 = 2;
const _PAYMENT_STATE_REFUNDED: u8 = 3;
// Ethgasstation API returns response in 10^8 wei units. So 10 from their API mean 1 gwei
const ETH_GAS_STATION_DECIMALS: u8 = 8;
const GAS_PRICE_PERCENT: u64 = 10;
/// It can change 12.5% max each block according to https://www.blocknative.com/blog/eip-1559-fees
const BASE_BLOCK_FEE_DIFF_PCT: u64 = 13;
const DEFAULT_LOGS_BLOCK_RANGE: u64 = 1000;
/// Take into account that the dynamic fee may increase by 3% during the swap.
const GAS_PRICE_APPROXIMATION_PERCENT_ON_START_SWAP: u64 = 3;
/// Take into account that the dynamic fee may increase at each of the following stages:
/// - it may increase by 2% until a swap is started;
/// - it may increase by 3% during the swap.
const GAS_PRICE_APPROXIMATION_PERCENT_ON_ORDER_ISSUE: u64 = 5;
/// Take into account that the dynamic fee may increase at each of the following stages:
/// - it may increase by 2% until an order is issued;
/// - it may increase by 2% until a swap is started;
/// - it may increase by 3% during the swap.
const GAS_PRICE_APPROXIMATION_PERCENT_ON_TRADE_PREIMAGE: u64 = 7;
lazy_static! {
pub static ref SWAP_CONTRACT: Contract = Contract::load(SWAP_CONTRACT_ABI.as_bytes()).unwrap();
pub static ref ERC20_CONTRACT: Contract = Contract::load(ERC20_ABI.as_bytes()).unwrap();
}
pub type Web3RpcFut<T> = Box<dyn Future<Item = T, Error = MmError<Web3RpcError>> + Send>;
pub type Web3RpcResult<T> = Result<T, MmError<Web3RpcError>>;
pub type GasStationResult = Result<GasStationData, MmError<GasStationReqErr>>;
#[derive(Debug, Display)]
pub enum GasStationReqErr {
#[display(fmt = "Transport '{}' error: {}", uri, error)]
Transport {
uri: String,
error: String,
},
#[display(fmt = "Invalid response: {}", _0)]
InvalidResponse(String),
Internal(String),
}
impl From<serde_json::Error> for GasStationReqErr {
fn from(e: serde_json::Error) -> Self { GasStationReqErr::InvalidResponse(e.to_string()) }
}
impl From<SlurpError> for GasStationReqErr {
fn from(e: SlurpError) -> Self {
let error = e.to_string();
match e {
SlurpError::ErrorDeserializing { .. } => GasStationReqErr::InvalidResponse(error),
SlurpError::Transport { uri, .. } | SlurpError::Timeout { uri, .. } => {
GasStationReqErr::Transport { uri, error }
},
SlurpError::Internal(_) | SlurpError::InvalidRequest(_) => GasStationReqErr::Internal(error),
}
}
}
#[derive(Debug, Display)]
pub enum Web3RpcError {
#[display(fmt = "Transport: {}", _0)]
Transport(String),
#[display(fmt = "Invalid response: {}", _0)]
InvalidResponse(String),
#[display(fmt = "Internal: {}", _0)]
Internal(String),
}
impl From<GasStationReqErr> for Web3RpcError {
fn from(err: GasStationReqErr) -> Self {
match err {
GasStationReqErr::Transport { .. } => Web3RpcError::Transport(err.to_string()),
GasStationReqErr::InvalidResponse(err) => Web3RpcError::InvalidResponse(err),
GasStationReqErr::Internal(err) => Web3RpcError::Internal(err),
}
}
}
impl From<serde_json::Error> for Web3RpcError {
fn from(e: serde_json::Error) -> Self { Web3RpcError::InvalidResponse(e.to_string()) }
}
impl From<web3::Error> for Web3RpcError {
fn from(e: web3::Error) -> Self {
let error_str = e.to_string();
match e.kind() {
web3::ErrorKind::InvalidResponse(_)
| web3::ErrorKind::Decoder(_)
| web3::ErrorKind::Msg(_)
| web3::ErrorKind::Rpc(_) => Web3RpcError::InvalidResponse(error_str),
web3::ErrorKind::Transport(_) | web3::ErrorKind::Io(_) => Web3RpcError::Transport(error_str),
_ => Web3RpcError::Internal(error_str),
}
}
}
impl From<web3::Error> for RawTransactionError {
fn from(e: web3::Error) -> Self { RawTransactionError::Transport(e.to_string()) }
}
impl From<ethabi::Error> for Web3RpcError {
fn from(e: ethabi::Error) -> Web3RpcError {
// Currently, we use the `ethabi` crate to work with a smart contract ABI known at compile time.
// It's an internal error if there are any issues during working with a smart contract ABI.
Web3RpcError::Internal(e.to_string())
}
}
impl From<ethabi::Error> for WithdrawError {
fn from(e: ethabi::Error) -> Self {
// Currently, we use the `ethabi` crate to work with a smart contract ABI known at compile time.
// It's an internal error if there are any issues during working with a smart contract ABI.
WithdrawError::InternalError(e.to_string())
}
}
impl From<web3::Error> for WithdrawError {
fn from(e: web3::Error) -> Self { WithdrawError::Transport(e.to_string()) }
}
impl From<Web3RpcError> for WithdrawError {
fn from(e: Web3RpcError) -> Self {
match e {
Web3RpcError::Transport(err) | Web3RpcError::InvalidResponse(err) => WithdrawError::Transport(err),
Web3RpcError::Internal(internal) => WithdrawError::InternalError(internal),
}
}
}
impl From<web3::Error> for TradePreimageError {
fn from(e: web3::Error) -> Self { TradePreimageError::Transport(e.to_string()) }
}
impl From<Web3RpcError> for TradePreimageError {
fn from(e: Web3RpcError) -> Self {
match e {
Web3RpcError::Transport(err) | Web3RpcError::InvalidResponse(err) => TradePreimageError::Transport(err),
Web3RpcError::Internal(internal) => TradePreimageError::InternalError(internal),
}
}
}
impl From<ethabi::Error> for TradePreimageError {
fn from(e: ethabi::Error) -> Self {
// Currently, we use the `ethabi` crate to work with a smart contract ABI known at compile time.
// It's an internal error if there are any issues during working with a smart contract ABI.
TradePreimageError::InternalError(e.to_string())
}
}
impl From<ethabi::Error> for BalanceError {
fn from(e: ethabi::Error) -> Self {
// Currently, we use the `ethabi` crate to work with a smart contract ABI known at compile time.
// It's an internal error if there are any issues during working with a smart contract ABI.
BalanceError::Internal(e.to_string())
}
}
impl From<web3::Error> for BalanceError {
fn from(e: web3::Error) -> Self { BalanceError::Transport(e.to_string()) }
}
#[derive(Debug, Deserialize, Serialize)]
struct SavedTraces {
/// ETH traces for my_address
traces: Vec<Trace>,
/// Earliest processed block
earliest_block: U256,
/// Latest processed block
latest_block: U256,
}
#[derive(Debug, Deserialize, Serialize)]
struct SavedErc20Events {
/// ERC20 events for my_address
events: Vec<Log>,
/// Earliest processed block
earliest_block: U256,
/// Latest processed block
latest_block: U256,
}
#[derive(Debug, PartialEq, Eq)]
enum EthCoinType {
/// Ethereum itself or it's forks: ETC/others
Eth,
/// ERC20 token with smart contract address
/// https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md
Erc20 { platform: String, token_addr: Address },
}
/// pImpl idiom.
#[derive(Debug)]
pub struct EthCoinImpl {
ticker: String,
coin_type: EthCoinType,
key_pair: KeyPair,
my_address: Address,
sign_message_prefix: Option<String>,
swap_contract_address: Address,
fallback_swap_contract: Option<Address>,
web3: Web3<Web3Transport>,
/// The separate web3 instances kept to get nonce, will replace the web3 completely soon
web3_instances: Vec<Web3Instance>,
decimals: u8,
gas_station_url: Option<String>,
gas_station_decimals: u8,
gas_station_policy: GasStationPricePolicy,
history_sync_state: Mutex<HistorySyncState>,
required_confirmations: AtomicU64,
/// Coin needs access to the context in order to reuse the logging and shutdown facilities.
/// Using a weak reference by default in order to avoid circular references and leaks.
ctx: MmWeak,
chain_id: Option<u64>,
/// the block range used for eth_getLogs
logs_block_range: u64,
nonce_lock: Arc<AsyncMutex<()>>,
}
#[derive(Clone, Debug)]
pub struct Web3Instance {
web3: Web3<Web3Transport>,
is_parity: bool,
}
#[derive(Deserialize, Serialize)]
#[serde(tag = "format")]
pub enum EthAddressFormat {
/// Single-case address (lowercase)
#[serde(rename = "singlecase")]
SingleCase,
/// Mixed-case address.
/// https://eips.ethereum.org/EIPS/eip-55
#[serde(rename = "mixedcase")]
MixedCase,
}
#[cfg_attr(test, mockable)]
async fn make_gas_station_request(url: &str) -> GasStationResult {
let resp = slurp_url(url).await?;
if resp.0 != StatusCode::OK {
let error = format!("Gas price request failed with status code {}", resp.0);
return MmError::err(GasStationReqErr::Transport {
uri: url.to_owned(),
error,
});
}
let result: GasStationData = json::from_slice(&resp.2)?;
Ok(result)
}
#[cfg_attr(test, mockable)]
impl EthCoinImpl {
/// Gets Transfer events from ERC20 smart contract `addr` between `from_block` and `to_block`
fn erc20_transfer_events(
&self,
contract: Address,
from_addr: Option<Address>,
to_addr: Option<Address>,
from_block: BlockNumber,
to_block: BlockNumber,
limit: Option<usize>,
) -> Box<dyn Future<Item = Vec<Log>, Error = String> + Send> {
let contract_event = try_fus!(ERC20_CONTRACT.event("Transfer"));
let topic0 = Some(vec![contract_event.signature()]);
let topic1 = from_addr.map(|addr| vec![addr.into()]);
let topic2 = to_addr.map(|addr| vec![addr.into()]);
let mut filter = FilterBuilder::default()
.topics(topic0, topic1, topic2, None)
.from_block(from_block)
.to_block(to_block)
.address(vec![contract]);
if let Some(l) = limit {
filter = filter.limit(l);
}
Box::new(self.web3.eth().logs(filter.build()).map_err(|e| ERRL!("{}", e)))
}
/// Gets ETH traces from ETH node between addresses in `from_block` and `to_block`
fn eth_traces(
&self,
from_addr: Vec<Address>,
to_addr: Vec<Address>,
from_block: BlockNumber,
to_block: BlockNumber,
limit: Option<usize>,
) -> Box<dyn Future<Item = Vec<Trace>, Error = String> + Send> {
let mut filter = TraceFilterBuilder::default()
.from_address(from_addr)
.to_address(to_addr)
.from_block(from_block)
.to_block(to_block);
if let Some(l) = limit {
filter = filter.count(l);
}
Box::new(self.web3.trace().filter(filter.build()).map_err(|e| ERRL!("{}", e)))
}
#[cfg_attr(target_arch = "wasm32", allow(dead_code))]
fn eth_traces_path(&self, ctx: &MmArc) -> PathBuf {
ctx.dbdir()
.join("TRANSACTIONS")
.join(format!("{}_{:#02x}_trace.json", self.ticker, self.my_address))
}
/// Load saved ETH traces from local DB
#[cfg(not(target_arch = "wasm32"))]
fn load_saved_traces(&self, ctx: &MmArc) -> Option<SavedTraces> {
let content = gstuff::slurp(&self.eth_traces_path(ctx));
if content.is_empty() {
None
} else {
match json::from_slice(&content) {
Ok(t) => Some(t),
Err(_) => None,
}
}
}
/// Load saved ETH traces from local DB
#[cfg(target_arch = "wasm32")]
fn load_saved_traces(&self, _ctx: &MmArc) -> Option<SavedTraces> {
common::panic_w("'load_saved_traces' is not implemented in WASM");
unreachable!()
}
/// Store ETH traces to local DB
#[cfg(not(target_arch = "wasm32"))]
fn store_eth_traces(&self, ctx: &MmArc, traces: &SavedTraces) {
let content = json::to_vec(traces).unwrap();
let tmp_file = format!("{}.tmp", self.eth_traces_path(ctx).display());
std::fs::write(&tmp_file, content).unwrap();
std::fs::rename(tmp_file, self.eth_traces_path(ctx)).unwrap();
}
/// Store ETH traces to local DB
#[cfg(target_arch = "wasm32")]
fn store_eth_traces(&self, _ctx: &MmArc, _traces: &SavedTraces) {
common::panic_w("'store_eth_traces' is not implemented in WASM");
unreachable!()
}
#[cfg_attr(target_arch = "wasm32", allow(dead_code))]
fn erc20_events_path(&self, ctx: &MmArc) -> PathBuf {
ctx.dbdir()
.join("TRANSACTIONS")
.join(format!("{}_{:#02x}_events.json", self.ticker, self.my_address))
}
/// Store ERC20 events to local DB
#[cfg(not(target_arch = "wasm32"))]
fn store_erc20_events(&self, ctx: &MmArc, events: &SavedErc20Events) {
let content = json::to_vec(events).unwrap();
let tmp_file = format!("{}.tmp", self.erc20_events_path(ctx).display());
std::fs::write(&tmp_file, content).unwrap();
std::fs::rename(tmp_file, self.erc20_events_path(ctx)).unwrap();
}
/// Store ERC20 events to local DB
#[cfg(target_arch = "wasm32")]
fn store_erc20_events(&self, _ctx: &MmArc, _events: &SavedErc20Events) {
common::panic_w("'store_erc20_events' is not implemented in WASM");
unreachable!()
}
/// Load saved ERC20 events from local DB
#[cfg(not(target_arch = "wasm32"))]
fn load_saved_erc20_events(&self, ctx: &MmArc) -> Option<SavedErc20Events> {
let content = gstuff::slurp(&self.erc20_events_path(ctx));
if content.is_empty() {
None
} else {
match json::from_slice(&content) {
Ok(t) => Some(t),
Err(_) => None,
}
}
}
/// Load saved ERC20 events from local DB
#[cfg(target_arch = "wasm32")]
fn load_saved_erc20_events(&self, _ctx: &MmArc) -> Option<SavedErc20Events> {
common::panic_w("'load_saved_erc20_events' is not implemented in WASM");
unreachable!()
}
/// The id used to differentiate payments on Etomic swap smart contract
fn etomic_swap_id(&self, time_lock: u32, secret_hash: &[u8]) -> Vec<u8> {
let mut input = vec![];
input.extend_from_slice(&time_lock.to_le_bytes());
input.extend_from_slice(secret_hash);
sha256(&input).to_vec()
}
fn estimate_gas(&self, req: CallRequest) -> Box<dyn Future<Item = U256, Error = web3::Error> + Send> {
// always using None block number as old Geth version accept only single argument in this RPC
Box::new(self.web3.eth().estimate_gas(req, None))
}
/// Gets `ReceiverSpent` events from etomic swap smart contract since `from_block`
fn spend_events(
&self,
swap_contract_address: Address,
from_block: u64,
to_block: u64,
) -> Box<dyn Future<Item = Vec<Log>, Error = String> + Send> {
let contract_event = try_fus!(SWAP_CONTRACT.event("ReceiverSpent"));
let filter = FilterBuilder::default()
.topics(Some(vec![contract_event.signature()]), None, None, None)
.from_block(BlockNumber::Number(from_block))
.to_block(BlockNumber::Number(to_block))
.address(vec![swap_contract_address])
.build();
Box::new(self.web3.eth().logs(filter).map_err(|e| ERRL!("{}", e)))
}
/// Gets `SenderRefunded` events from etomic swap smart contract since `from_block`
fn refund_events(
&self,
swap_contract_address: Address,
from_block: u64,
to_block: u64,
) -> Box<dyn Future<Item = Vec<Log>, Error = String> + Send> {
let contract_event = try_fus!(SWAP_CONTRACT.event("SenderRefunded"));
let filter = FilterBuilder::default()
.topics(Some(vec![contract_event.signature()]), None, None, None)
.from_block(BlockNumber::Number(from_block))
.to_block(BlockNumber::Number(to_block))
.address(vec![swap_contract_address])
.build();
Box::new(self.web3.eth().logs(filter).map_err(|e| ERRL!("{}", e)))
}
/// Try to parse address from string.
pub fn address_from_str(&self, address: &str) -> Result<Address, String> {
Ok(try_s!(valid_addr_from_str(address)))
}
}
async fn get_raw_transaction_impl(coin: EthCoin, req: RawTransactionRequest) -> RawTransactionResult {
let tx = match req.tx_hash.strip_prefix("0x") {
Some(tx) => tx,
None => &req.tx_hash,
};
let hash = H256::from_str(tx).map_to_mm(|e| RawTransactionError::InvalidHashError(e.to_string()))?;
let web3_tx = coin.web3.eth().transaction(TransactionId::Hash(hash)).compat().await?;
let web3_tx = web3_tx.or_mm_err(|| RawTransactionError::HashNotExist(req.tx_hash))?;
let raw = signed_tx_from_web3_tx(web3_tx).map_to_mm(RawTransactionError::InternalError)?;
Ok(RawTransactionRes {
tx_hex: BytesJson(rlp::encode(&raw)),
})
}
async fn withdraw_impl(coin: EthCoin, req: WithdrawRequest) -> WithdrawResult {
let to_addr = coin
.address_from_str(&req.to)
.map_to_mm(WithdrawError::InvalidAddress)?;
let my_balance = coin.my_balance().compat().await?;
let my_balance_dec = u256_to_big_decimal(my_balance, coin.decimals)?;
let (mut wei_amount, dec_amount) = if req.max {
(my_balance, my_balance_dec.clone())
} else {
let wei_amount = wei_from_big_decimal(&req.amount, coin.decimals)?;
(wei_amount, req.amount.clone())
};
if wei_amount > my_balance {
return MmError::err(WithdrawError::NotSufficientBalance {
coin: coin.ticker.clone(),
available: my_balance_dec.clone(),
required: dec_amount,
});
};
let (mut eth_value, data, call_addr, fee_coin) = match &coin.coin_type {
EthCoinType::Eth => (wei_amount, vec![], to_addr, coin.ticker()),
EthCoinType::Erc20 { platform, token_addr } => {
let function = ERC20_CONTRACT.function("transfer")?;
let data = function.encode_input(&[Token::Address(to_addr), Token::Uint(wei_amount)])?;
(0.into(), data, *token_addr, platform.as_str())
},
};
let eth_value_dec = u256_to_big_decimal(eth_value, coin.decimals)?;
let (gas, gas_price) = match req.fee {
Some(WithdrawFee::EthGas { gas_price, gas }) => {
let gas_price = wei_from_big_decimal(&gas_price, 9)?;
(gas.into(), gas_price)
},
Some(fee_policy) => {
let error = format!("Expected 'EthGas' fee type, found {:?}", fee_policy);
return MmError::err(WithdrawError::InvalidFeePolicy(error));
},
None => {
let gas_price = coin.get_gas_price().compat().await?;
// covering edge case by deducting the standard transfer fee when we want to max withdraw ETH
let eth_value_for_estimate = if req.max && coin.coin_type == EthCoinType::Eth {
eth_value - gas_price * U256::from(21000)
} else {
eth_value
};
let estimate_gas_req = CallRequest {
value: Some(eth_value_for_estimate),
data: Some(data.clone().into()),
from: Some(coin.my_address),
to: call_addr,
gas: None,
// gas price must be supplied because some smart contracts base their
// logic on gas price, e.g. TUSD: https://github.com/KomodoPlatform/atomicDEX-API/issues/643
gas_price: Some(gas_price),
};
// TODO Note if the wallet's balance is insufficient to withdraw, then `estimate_gas` may fail with the `Exception` error.
// TODO Ideally we should determine the case when we have the insufficient balance and return `WithdrawError::NotSufficientBalance`.
let gas_limit = coin.estimate_gas(estimate_gas_req).compat().await?;
(gas_limit, gas_price)
},
};
let total_fee = gas * gas_price;
let total_fee_dec = u256_to_big_decimal(total_fee, coin.decimals)?;
if req.max && coin.coin_type == EthCoinType::Eth {
if eth_value < total_fee || wei_amount < total_fee {
return MmError::err(WithdrawError::AmountTooLow {
amount: eth_value_dec,
threshold: total_fee_dec,
});
}
eth_value -= total_fee;
wei_amount -= total_fee;
};
let _nonce_lock = coin.nonce_lock.lock().await;
let nonce_fut = get_addr_nonce(coin.my_address, coin.web3_instances.clone()).compat();
let nonce = match select(nonce_fut, Timer::sleep(30.)).await {
Either::Left((nonce_res, _)) => nonce_res.map_to_mm(WithdrawError::Transport)?,
Either::Right(_) => return MmError::err(WithdrawError::Transport("Get address nonce timed out".to_owned())),
};
let tx = UnSignedEthTx {
nonce,
value: eth_value,
action: Action::Call(call_addr),
data,
gas,
gas_price,
};
let signed = tx.sign(coin.key_pair.secret(), coin.chain_id);
let bytes = rlp::encode(&signed);
let amount_decimal = u256_to_big_decimal(wei_amount, coin.decimals)?;
let mut spent_by_me = amount_decimal.clone();
let received_by_me = if to_addr == coin.my_address {
amount_decimal.clone()
} else {
0.into()
};
let fee_details = EthTxFeeDetails::new(gas, gas_price, fee_coin)?;
if coin.coin_type == EthCoinType::Eth {
spent_by_me += &fee_details.total_fee;
}
let my_address = coin.my_address().map_to_mm(WithdrawError::InternalError)?;
Ok(TransactionDetails {
to: vec![checksum_address(&format!("{:#02x}", to_addr))],
from: vec![my_address],
total_amount: amount_decimal,
my_balance_change: &received_by_me - &spent_by_me,
spent_by_me,
received_by_me,
tx_hex: bytes.into(),
tx_hash: format!("{:02x}", signed.tx_hash()),
block_height: 0,
fee_details: Some(fee_details.into()),
coin: coin.ticker.clone(),
internal_id: vec![].into(),
timestamp: now_ms() / 1000,
kmd_rewards: None,
transaction_type: Default::default(),
})
}
#[derive(Clone, Debug)]
pub struct EthCoin(Arc<EthCoinImpl>);
impl Deref for EthCoin {
type Target = EthCoinImpl;
fn deref(&self) -> &EthCoinImpl { &*self.0 }
}
#[async_trait]
impl SwapOps for EthCoin {
fn send_taker_fee(&self, fee_addr: &[u8], amount: BigDecimal, _uuid: &[u8]) -> TransactionFut {
let address = try_tx_fus!(addr_from_raw_pubkey(fee_addr));
Box::new(
self.send_to_address(address, try_tx_fus!(wei_from_big_decimal(&amount, self.decimals)))
.map(TransactionEnum::from),
)
}
fn send_maker_payment(
&self,
time_lock: u32,
taker_pub: &[u8],
secret_hash: &[u8],
amount: BigDecimal,
swap_contract_address: &Option<BytesJson>,
_swap_unique_data: &[u8],
) -> TransactionFut {
let taker_addr = try_tx_fus!(addr_from_raw_pubkey(taker_pub));
let swap_contract_address = try_tx_fus!(swap_contract_address.try_to_address());
Box::new(
self.send_hash_time_locked_payment(
self.etomic_swap_id(time_lock, secret_hash),
try_tx_fus!(wei_from_big_decimal(&amount, self.decimals)),
time_lock,
secret_hash,
taker_addr,
swap_contract_address,
)
.map(TransactionEnum::from),
)
}
fn send_taker_payment(
&self,
time_lock: u32,
maker_pub: &[u8],
secret_hash: &[u8],
amount: BigDecimal,
swap_contract_address: &Option<BytesJson>,
_swap_unique_data: &[u8],
) -> TransactionFut {
let maker_addr = try_tx_fus!(addr_from_raw_pubkey(maker_pub));
let swap_contract_address = try_tx_fus!(swap_contract_address.try_to_address());
Box::new(
self.send_hash_time_locked_payment(
self.etomic_swap_id(time_lock, secret_hash),
try_tx_fus!(wei_from_big_decimal(&amount, self.decimals)),
time_lock,
secret_hash,
maker_addr,
swap_contract_address,
)
.map(TransactionEnum::from),
)
}
fn send_maker_spends_taker_payment(
&self,
taker_payment_tx: &[u8],
_time_lock: u32,
_taker_pub: &[u8],
secret: &[u8],
swap_contract_address: &Option<BytesJson>,
_swap_unique_data: &[u8],
) -> TransactionFut {
let tx: UnverifiedTransaction = try_tx_fus!(rlp::decode(taker_payment_tx));
let signed = try_tx_fus!(SignedEthTx::new(tx));
let swap_contract_address = try_tx_fus!(swap_contract_address.try_to_address(), signed);
Box::new(
self.spend_hash_time_locked_payment(signed, swap_contract_address, secret)
.map(TransactionEnum::from),
)
}
fn send_taker_spends_maker_payment(
&self,
maker_payment_tx: &[u8],
_time_lock: u32,
_maker_pub: &[u8],
secret: &[u8],
swap_contract_address: &Option<BytesJson>,
_swap_unique_data: &[u8],
) -> TransactionFut {
let tx: UnverifiedTransaction = try_tx_fus!(rlp::decode(maker_payment_tx));
let signed = try_tx_fus!(SignedEthTx::new(tx));
let swap_contract_address = try_tx_fus!(swap_contract_address.try_to_address());
Box::new(
self.spend_hash_time_locked_payment(signed, swap_contract_address, secret)
.map(TransactionEnum::from),
)
}
fn send_taker_refunds_payment(
&self,
taker_payment_tx: &[u8],
_time_lock: u32,
_maker_pub: &[u8],
_secret_hash: &[u8],
swap_contract_address: &Option<BytesJson>,
_swap_unique_data: &[u8],
) -> TransactionFut {
let tx: UnverifiedTransaction = try_tx_fus!(rlp::decode(taker_payment_tx));
let signed = try_tx_fus!(SignedEthTx::new(tx));
let swap_contract_address = try_tx_fus!(swap_contract_address.try_to_address());
Box::new(
self.refund_hash_time_locked_payment(swap_contract_address, signed)
.map(TransactionEnum::from),
)
}
fn send_maker_refunds_payment(
&self,
maker_payment_tx: &[u8],
_time_lock: u32,
_taker_pub: &[u8],
_secret_hash: &[u8],
swap_contract_address: &Option<BytesJson>,
_swap_unique_data: &[u8],
) -> TransactionFut {
let tx: UnverifiedTransaction = try_tx_fus!(rlp::decode(maker_payment_tx));
let signed = try_tx_fus!(SignedEthTx::new(tx));
let swap_contract_address = try_tx_fus!(swap_contract_address.try_to_address());
Box::new(
self.refund_hash_time_locked_payment(swap_contract_address, signed)
.map(TransactionEnum::from),
)
}
fn validate_fee(
&self,
fee_tx: &TransactionEnum,
expected_sender: &[u8],
fee_addr: &[u8],
amount: &BigDecimal,
min_block_number: u64,
_uuid: &[u8],
) -> Box<dyn Future<Item = (), Error = String> + Send> {
let selfi = self.clone();
let tx = match fee_tx {
TransactionEnum::SignedEthTx(t) => t.clone(),
_ => panic!(),
};
let sender_addr = try_fus!(addr_from_raw_pubkey(expected_sender));
let fee_addr = try_fus!(addr_from_raw_pubkey(fee_addr));
let amount = amount.clone();
let fut = async move {
let expected_value = try_s!(wei_from_big_decimal(&amount, selfi.decimals));
let tx_from_rpc = try_s!(
selfi
.web3
.eth()
.transaction(TransactionId::Hash(tx.hash))
.compat()
.await
);
let tx_from_rpc = match tx_from_rpc {
Some(t) => t,
None => return ERR!("Didn't find provided tx {:?} on ETH node", tx),
};
if tx_from_rpc.from != sender_addr {
return ERR!(
"Fee tx {:?} was sent from wrong address, expected {:?}",
tx_from_rpc,
sender_addr
);
}
if let Some(block_number) = tx_from_rpc.block_number {
if block_number <= min_block_number.into() {
return ERR!(
"Fee tx {:?} confirmed before min_block {}",
tx_from_rpc,
min_block_number,
);
}
}
match &selfi.coin_type {
EthCoinType::Eth => {
if tx_from_rpc.to != Some(fee_addr) {
return ERR!(
"Fee tx {:?} was sent to wrong address, expected {:?}",
tx_from_rpc,
fee_addr
);
}
if tx_from_rpc.value < expected_value {
return ERR!(
"Fee tx {:?} value is less than expected {:?}",
tx_from_rpc,
expected_value
);
}
},
EthCoinType::Erc20 {
platform: _,
token_addr,
} => {
if tx_from_rpc.to != Some(*token_addr) {
return ERR!(
"ERC20 Fee tx {:?} called wrong smart contract, expected {:?}",
tx_from_rpc,
token_addr
);
}
let function = try_s!(ERC20_CONTRACT.function("transfer"));
let decoded_input = try_s!(function.decode_input(&tx_from_rpc.input.0));
if decoded_input[0] != Token::Address(fee_addr) {
return ERR!(
"ERC20 Fee tx was sent to wrong address {:?}, expected {:?}",
decoded_input[0],
fee_addr
);
}
match decoded_input[1] {
Token::Uint(value) => {
if value < expected_value {
return ERR!("ERC20 Fee tx value {} is less than expected {}", value, expected_value);
}
},
_ => return ERR!("Should have got uint token but got {:?}", decoded_input[1]),
}
},
}
Ok(())
};
Box::new(fut.boxed().compat())
}
fn validate_maker_payment(&self, input: ValidatePaymentInput) -> Box<dyn Future<Item = (), Error = String> + Send> {
let swap_contract_address = try_fus!(input.swap_contract_address.try_to_address());
self.validate_payment(
&input.payment_tx,
input.time_lock,
&input.other_pub,
&input.secret_hash,
input.amount,
swap_contract_address,
)
}
fn validate_taker_payment(&self, input: ValidatePaymentInput) -> Box<dyn Future<Item = (), Error = String> + Send> {
let swap_contract_address = try_fus!(input.swap_contract_address.try_to_address());
self.validate_payment(
&input.payment_tx,
input.time_lock,
&input.other_pub,
&input.secret_hash,
input.amount,
swap_contract_address,
)
}
fn check_if_my_payment_sent(
&self,
time_lock: u32,
_other_pub: &[u8],
secret_hash: &[u8],
from_block: u64,
swap_contract_address: &Option<BytesJson>,
_swap_unique_data: &[u8],
) -> Box<dyn Future<Item = Option<TransactionEnum>, Error = String> + Send> {
let id = self.etomic_swap_id(time_lock, secret_hash);
let swap_contract_address = try_fus!(swap_contract_address.try_to_address());
let selfi = self.clone();
let fut = async move {
let status = try_s!(
selfi
.payment_status(swap_contract_address, Token::FixedBytes(id.clone()))
.compat()
.await
);
if status == PAYMENT_STATE_UNINITIALIZED.into() {
return Ok(None);
};
let mut current_block = try_s!(selfi.current_block().compat().await);
if current_block < from_block {
current_block = from_block;
}
let mut from_block = from_block;
loop {
let to_block = current_block.min(from_block + selfi.logs_block_range);
let events = try_s!(
selfi
.payment_sent_events(swap_contract_address, from_block, to_block)
.compat()
.await
);
let found = events.iter().find(|event| &event.data.0[..32] == id.as_slice());
match found {
Some(event) => {
let transaction = try_s!(
selfi
.web3
.eth()
.transaction(TransactionId::Hash(event.transaction_hash.unwrap()))
.compat()
.await
);
match transaction {