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lib.rs
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/
lib.rs
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#![no_std]
multiversx_sc::imports!();
multiversx_sc::derive_imports!();
use common_errors::*;
use common_structs::*;
pub const MAX_FEE_PERCENT: u64 = 100_000;
pub const CLAIM_BATCH_SIZE: usize = 50usize;
#[derive(TypeAbi, TopEncode)]
pub struct AggregatorEvent<M: ManagedTypeApi> {
payment_in: ManagedVec<M, EsdtTokenPayment<M>>,
payment_out: ManagedVec<M, EsdtTokenPayment<M>>,
}
#[multiversx_sc::contract]
pub trait AggregatorContract: token_send::TokenSendModule {
#[init]
fn init(&self, egld_wrapper_address: ManagedAddress, egld_wrapped_token_id: TokenIdentifier) {
self.egld_wrapper_address().set(egld_wrapper_address.clone());
self.egld_wrapped_token_id().set(egld_wrapped_token_id);
}
fn _find_token_in_vault(&self, tokens: &ManagedVec<TokenAmount<Self::Api>>, token_id: &TokenIdentifier) -> Option<usize> {
for (index, token) in tokens.into_iter().enumerate() {
if token_id == &token.token { return Some(index); }
}
None
}
fn _upsert_vaults(&self, vaults: &mut ManagedVec<TokenAmount<Self::Api>>, token_id: &TokenIdentifier, amount: BigUint) {
let index_opt = self._find_token_in_vault(vaults, token_id);
if let Some(index) = index_opt {
let total_amount = vaults.get(index).amount + amount;
_ = vaults.set(index, &TokenAmount::new(token_id.clone(), total_amount));
} else { vaults.push(TokenAmount::new(token_id.clone(), amount)); }
}
fn _exchange(&self, vaults: &mut ManagedVec<TokenAmount<Self::Api>>, step: AggregatorStep<Self::Api>) {
let index_in_opt = self._find_token_in_vault(vaults, &step.token_in);
require!(index_in_opt.is_some(), ERROR_INVALID_TOKEN_IN);
let index_in = index_in_opt.unwrap();
let mut amount_in = vaults.get(index_in).amount;
if step.amount_in > 0u64 {
require!(amount_in >= step.amount_in, ERROR_INVALID_AMOUNT_IN);
let remaining_amount = &amount_in - &step.amount_in;
_ = vaults.set(index_in, &TokenAmount::new(step.token_in.clone(), remaining_amount));
amount_in = step.amount_in;
} else { _ = vaults.set(index_in, &TokenAmount::new(step.token_in.clone(), BigUint::zero())); }
let mut payments = ManagedVec::new();
payments.push(EsdtTokenPayment::new(step.token_in, 0, amount_in));
let sc_address = self.blockchain().get_sc_address();
let amount_before = self.blockchain().get_esdt_balance(&sc_address, &step.token_out, 0);
let mut contract_call = self.send().contract_call::<()>(step.pool_address, step.function_name);
for arg in step.arguments.into_iter() {
contract_call.push_raw_argument(arg);
}
let _: IgnoreValue = contract_call.with_multi_token_transfer(payments).execute_on_dest_context();
let amount_after = self.blockchain().get_esdt_balance(&sc_address, &step.token_out, 0);
let amount_out = amount_after - amount_before;
require!(amount_out > 0, ERROR_ZERO_AMOUNT);
self._upsert_vaults(vaults, &step.token_out, amount_out);
}
fn _aggregate(&self, payments: &ManagedVec<EsdtTokenPayment>, steps: ManagedVec<AggregatorStep<Self::Api>>,
limits: ManagedVec<TokenAmount<Self::Api>>, protocol: OptionalValue<ManagedAddress>) -> ManagedVec<EsdtTokenPayment> {
let mut vaults = ManagedVec::new();
for payment in payments.into_iter() {
require!(payment.token_nonce == 0, ERROR_ZERO_TOKEN_NONCE);
require!(payment.amount > 0u64, ERROR_ZERO_AMOUNT);
self._upsert_vaults(&mut vaults, &payment.token_identifier, payment.amount);
}
match protocol {
OptionalValue::Some(protocol_addr) => {
require!(self.protocol_fee().contains_key(&protocol_addr), ERROR_PROTOCOL_NOT_REGISTED);
let fee_percent = self.protocol_fee_percent(protocol_addr.clone()).get();
let ashswap_percent = self.ashswap_fee_percent().get();
// loop over vaults to subtract fee
for index in 0..vaults.len() {
let vault = vaults.get(index).clone();
let total_fee = vault.amount.clone() * fee_percent.clone() / MAX_FEE_PERCENT;
let ashswap_fee = &total_fee * ashswap_percent.clone() / MAX_FEE_PERCENT;
let protocol_fee = &total_fee - &ashswap_fee;
// key has already imported at this step due to previous require
// protocol fee
let mut map_token_fee_amount = self.protocol_fee().get(&protocol_addr).unwrap();
let fee_amount = map_token_fee_amount.get(&vault.token).unwrap_or_else(|| BigUint::zero());
map_token_fee_amount.insert(vault.token.clone(), fee_amount + protocol_fee);
let fee_amount = self.ashswap_fee().get(&vault.token).unwrap_or_else(|| BigUint::zero());
self.ashswap_fee().insert(vault.token.clone(), fee_amount + ashswap_fee);
_ = vaults.set(index, &TokenAmount::new(vault.token, vault.amount - total_fee));
}
}
OptionalValue::None => {}
};
let mut results = ManagedVec::new();
let sc_address = self.blockchain().get_sc_address();
for step in steps.into_iter() {
require!(step.pool_address != sc_address, ERROR_INVALID_POOL_ADDR);
self._exchange(&mut vaults, step);
}
require!(vaults.len() == limits.len(), ERROR_OUTPUT_LEN_MISMATCH);
for limit in limits.into_iter() {
let index_opt = self._find_token_in_vault(&vaults, &limit.token);
require!(index_opt.is_some(), ERROR_INVALID_TOKEN_IN);
let index = index_opt.unwrap();
let vault = vaults.get(index);
require!(vault.amount >= limit.amount, ERROR_SLIPPAGE_SCREW_YOU);
results.push(EsdtTokenPayment::new(vault.token, 0, vault.amount));
// remove index from vaults for de-duplicate limits
vaults.remove(index);
}
results
}
#[payable("EGLD")]
#[endpoint(aggregateEgld)]
fn aggregate_egld(&self, steps: ManagedVec<AggregatorStep<Self::Api>>, limits: ManagedVec<TokenAmount<Self::Api>>,
protocol: OptionalValue<ManagedAddress>) -> ManagedVec<EsdtTokenPayment> {
let mut payments = ManagedVec::new();
// egld value if exist
let egld_amount: BigUint = self.call_value().egld_value().clone_value();
if egld_amount > BigUint::zero() {
let payment = self.wrap_egld(egld_amount);
payments.push(payment);
}
require!(!payments.is_empty(), ERROR_EMPTY_PAYMENTS);
let results = self._aggregate(&payments, steps, limits, protocol);
let caller = self.blockchain().get_caller();
let payment_out = self.send_multiple_tokens_if_not_zero(&caller, &results);
self.aggregate_event(&caller, AggregatorEvent { payment_in: payments.clone(), payment_out: payment_out.clone() });
payment_out
}
#[payable("*")]
#[endpoint(aggregateEsdt)]
fn aggregate_esdt(&self, steps: ManagedVec<AggregatorStep<Self::Api>>, limits: ManagedVec<TokenAmount<Self::Api>>, egld_return: bool,
protocol: OptionalValue<ManagedAddress>) -> MultiValue2<BigUint, ManagedVec<EsdtTokenPayment>> {
let payments = self.call_value().all_esdt_transfers().clone_value();
require!(!payments.is_empty(), ERROR_EMPTY_PAYMENTS);
let results = self._aggregate(&payments, steps, limits, protocol);
let caller = self.blockchain().get_caller();
if egld_return {
let (payment_out, egld_payment) =
self.send_multiple_tokens_if_not_zero_support_egld(&caller, &results);
let mut payment_events = payment_out.clone();
payment_events.push(egld_payment.clone()); // distinct between egld and wegld in event log is not necessary
self.aggregate_event(&caller, AggregatorEvent { payment_in: payments.clone(), payment_out: payment_events.clone() });
MultiValue2::from((egld_payment.amount, payment_out))
} else {
let payment_out = self.send_multiple_tokens_if_not_zero(&caller, &results);
self.aggregate_event(&caller, AggregatorEvent { payment_in: payments.clone(), payment_out: payment_out.clone() });
MultiValue2::from((BigUint::zero(), payment_out))
}
}
#[payable("*")]
#[endpoint]
fn aggregate(&self, steps: ManagedVec<AggregatorStep<Self::Api>>, limits: MultiValueEncoded<TokenAmount<Self::Api>>) -> ManagedVec<EsdtTokenPayment> {
let payments = self.call_value().all_esdt_transfers();
require!(!payments.is_empty(), ERROR_EMPTY_PAYMENTS);
let results = self._aggregate(&payments, steps, limits.to_vec(), OptionalValue::None);
let caller = self.blockchain().get_caller();
let payment_out = self.send_multiple_tokens_if_not_zero(&caller, &results);
self.aggregate_event(&caller, AggregatorEvent { payment_in: payments.clone_value(), payment_out: payment_out.clone() });
payment_out
}
#[event("aggregate_event")]
fn aggregate_event(
&self,
#[indexed] caller: &ManagedAddress,
aggregate: AggregatorEvent<Self::Api>,
);
#[storage_mapper("protocol_fee")]
fn protocol_fee(&self) -> MapStorageMapper<Self::Api, ManagedAddress, MapMapper<TokenIdentifier, BigUint>>;
// because the length of map fee can be very large, we might need to get fee in batch
// to avoid memory overflow
#[view(getClaimabeProtocolFee)]
fn get_claimable_protocol_fee(&self, protocol: ManagedAddress, from_idx: u64, to_idx: u64) -> ManagedVec<TokenAmount<Self::Api>> {
let mut result = ManagedVec::new();
let mut i = 0u64;
for (token, fee_amount) in self.protocol_fee().get(&protocol).unwrap().into_iter() {
if i >= from_idx && i < to_idx {
result.push(TokenAmount::new(token, fee_amount));
}
i += 1;
}
result
}
#[only_owner]
#[endpoint(registerProtocolFee)]
fn register_protocol_fee(&self, fee_percent: u64, whitelist_address: ManagedAddress) {
require!(fee_percent <= MAX_FEE_PERCENT, ERROR_INVALID_FEE_PERCENT);
require!(!whitelist_address.is_zero(), ERROR_INVALID_ADDRESS);
self.protocol_fee_percent(whitelist_address.clone()).set(fee_percent);
self.protocol_fee().insert_default(whitelist_address);
}
#[storage_mapper("ashswap_fee")]
fn ashswap_fee(&self) -> MapMapper<TokenIdentifier, BigUint>;
// because the length of map fee can be very large, we might need to get fee in batch
// to avoid memory overflow
#[view(getClaimabeAshswapFee)]
fn get_claimable_ashswap_fee(&self, from_idx: u64, to_idx: u64) -> ManagedVec<TokenAmount<Self::Api>> {
let mut result = ManagedVec::new();
let mut i = 0u64;
for (token, fee_amount) in self.ashswap_fee().into_iter() {
if i >= from_idx && i < to_idx {
result.push(TokenAmount::new(token, fee_amount));
}
i += 1;
}
result
}
#[view(getAshswapFeeAddress)]
#[storage_mapper("ashswap_fee_address")]
fn ashswap_fee_address(&self) -> SingleValueMapper<ManagedAddress>;
#[only_owner]
#[endpoint(registerAshswapFee)]
fn register_ashswap_fee(&self, fee_percent: u64, whitelist_address: ManagedAddress) {
require!(fee_percent <= MAX_FEE_PERCENT, ERROR_INVALID_FEE_PERCENT);
require!(!whitelist_address.is_zero(), ERROR_INVALID_ADDRESS);
self.ashswap_fee_percent().set(fee_percent);
self.ashswap_fee_address().set(whitelist_address);
}
#[view(getProtocolFeePercent)]
#[storage_mapper("protocol_fee_percent")]
fn protocol_fee_percent(&self, address: ManagedAddress) -> SingleValueMapper<u64>;
#[view(getAshswapFeePercent)]
#[storage_mapper("ashswap_fee_percent")]
fn ashswap_fee_percent(&self) -> SingleValueMapper<u64>;
#[endpoint(claimProtocolFee)]
fn claim_protocol_fee(&self, protocol: ManagedAddress) {
require!(self.protocol_fee().contains_key(&protocol), ERROR_PROTOCOL_NOT_REGISTED);
let mut map_token_fee_amount = self.protocol_fee().get(&protocol).unwrap();
let mut payments = ManagedVec::<Self::Api, EsdtTokenPayment>::new();
let mut i = 0usize;
for (token, fee_amount) in map_token_fee_amount.into_iter() {
payments.push(EsdtTokenPayment::new(token, 0, fee_amount));
if i >= CLAIM_BATCH_SIZE {
break;
}
i += 1;
}
for payment in payments.into_iter() {
map_token_fee_amount.remove(&payment.token_identifier);
}
self.send_multiple_tokens_if_not_zero(&protocol, &payments);
}
#[endpoint(claimProtocolFeeByTokens)]
fn claim_protocol_fee_by_tokens(&self, protocol: ManagedAddress, tokens: ManagedVec<TokenIdentifier>) {
require!(self.protocol_fee().contains_key(&protocol), ERROR_PROTOCOL_NOT_REGISTED);
let mut map_token_fee_amount = self.protocol_fee().get(&protocol).unwrap();
let mut payments = ManagedVec::<Self::Api, EsdtTokenPayment>::new();
for token in tokens.into_iter() {
let fee_amount = map_token_fee_amount.get(&token).unwrap_or_else(|| BigUint::zero());
map_token_fee_amount.remove(&token);
payments.push(EsdtTokenPayment::new(token, 0, fee_amount));
}
self.send_multiple_tokens_if_not_zero(&protocol, &payments);
}
#[endpoint(claimAshswapFee)]
fn claim_ashswap_fee(&self) {
let mut payments = ManagedVec::<Self::Api, EsdtTokenPayment>::new();
let mut i = 0usize;
for (token, fee_amount) in self.ashswap_fee().into_iter() {
payments.push(EsdtTokenPayment::new(token, 0, fee_amount));
if i >= CLAIM_BATCH_SIZE {
break;
}
i += 1;
}
for payment in payments.into_iter() {
self.ashswap_fee().remove(&payment.token_identifier);
}
self.send_multiple_tokens_if_not_zero(&self.ashswap_fee_address().get(), &payments);
}
#[endpoint(claimAshswapFeeByTokens)]
fn claim_ashswap_fee_by_tokens(&self, tokens: ManagedVec<TokenIdentifier>) {
let mut payments = ManagedVec::<Self::Api, EsdtTokenPayment>::new();
for token in tokens.into_iter() {
let fee_amount = self.ashswap_fee().get(&token).unwrap_or_else(|| BigUint::zero());
self.ashswap_fee().remove(&token);
payments.push(EsdtTokenPayment::new(token, 0, fee_amount));
}
self.send_multiple_tokens_if_not_zero(&self.ashswap_fee_address().get(), &payments);
}
}