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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| pub static NON_EXISTENT_KEY_ERR_MSG: &[u8] = b"non-existent key"; | ||
| pub static FEES_NOT_COVERED_ERR_MSG: &[u8] = b"fees not covered"; | ||
| pub static CANNOT_DEPOSIT_FUNDS_ERR_MSG: &[u8] = | ||
| b"cannot deposit funds without covering the fee cost first"; | ||
| pub const SECONDS_PER_ROUND: u64 = 6; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| multiversx_sc::imports!(); | ||
| multiversx_sc::derive_imports!(); | ||
|
|
||
| use crate::{ | ||
| constants::*, | ||
| deposit_info::{DepositInfo, Fee}, | ||
| storage, | ||
| }; | ||
|
|
||
| #[multiversx_sc::module] | ||
| pub trait PayFeeAndFund: storage::StorageModule { | ||
| #[endpoint] | ||
| #[payable("*")] | ||
| fn fund(&self, address: ManagedAddress, valability: u64) { | ||
| let deposit_mapper = self.deposit(&address); | ||
| require!(!deposit_mapper.is_empty(), FEES_NOT_COVERED_ERR_MSG); | ||
| let depositor = deposit_mapper.get().depositor_address; | ||
| require!( | ||
| self.blockchain().get_caller() == depositor, | ||
| "invalid depositor" | ||
| ); | ||
|
|
||
| let egld_payment = self.call_value().egld_value().clone_value(); | ||
| let esdt_payment = self.call_value().all_esdt_transfers().clone_value(); | ||
| let num_tokens = self.get_num_token_transfers(&egld_payment, &esdt_payment); | ||
| require!(num_tokens > 0, "amount must be greater than 0"); | ||
|
|
||
| let fee = self.fee().get(); | ||
| deposit_mapper.update(|deposit| { | ||
| require!( | ||
| deposit.egld_funds == 0 && deposit.esdt_funds.is_empty(), | ||
| "key already used" | ||
| ); | ||
| require!( | ||
| fee * num_tokens as u64 <= deposit.fees.value, | ||
| CANNOT_DEPOSIT_FUNDS_ERR_MSG | ||
| ); | ||
|
|
||
| deposit.fees.num_token_to_transfer += num_tokens; | ||
| deposit.valability = valability; | ||
| deposit.expiration_round = self.get_expiration_round(valability); | ||
| deposit.esdt_funds = esdt_payment; | ||
| deposit.egld_funds = egld_payment; | ||
| }); | ||
| } | ||
|
|
||
| #[endpoint(depositFees)] | ||
| #[payable("EGLD")] | ||
| fn deposit_fees(&self, address: ManagedAddress) { | ||
| let payment = self.call_value().egld_or_single_esdt(); | ||
| let accepted_fee_token = self.fee_token().get(); | ||
| require!( | ||
| payment.token_identifier == accepted_fee_token, | ||
| "Invalid fee token provided" | ||
| ); | ||
| let caller_address = self.blockchain().get_caller(); | ||
| let deposit_mapper = self.deposit(&address); | ||
| if !deposit_mapper.is_empty() { | ||
| deposit_mapper.update(|deposit| deposit.fees.value += payment.amount); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| let new_deposit = DepositInfo { | ||
| depositor_address: caller_address, | ||
| esdt_funds: ManagedVec::new(), | ||
| egld_funds: BigUint::zero(), | ||
| valability: 0, | ||
| expiration_round: 0, | ||
| fees: Fee { | ||
| num_token_to_transfer: 0, | ||
| value: payment.amount, | ||
| }, | ||
| }; | ||
| deposit_mapper.set(new_deposit); | ||
| } | ||
|
|
||
| fn get_num_token_transfers( | ||
| &self, | ||
| egld_value: &BigUint, | ||
| esdt_transfers: &ManagedVec<EsdtTokenPayment>, | ||
| ) -> usize { | ||
| let mut amount = esdt_transfers.len(); | ||
| if egld_value > &0 { | ||
| amount += 1; | ||
| } | ||
|
|
||
| amount | ||
| } | ||
|
|
||
| fn get_expiration_round(&self, valability: u64) -> u64 { | ||
| let valability_rounds = valability / SECONDS_PER_ROUND; | ||
| self.blockchain().get_block_round() + valability_rounds | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| multiversx_sc::imports!(); | ||
| multiversx_sc::derive_imports!(); | ||
|
|
||
| use crate::deposit_info::*; | ||
|
|
||
| #[multiversx_sc::module] | ||
| pub trait StorageModule { | ||
| #[view] | ||
| #[storage_mapper("deposit")] | ||
| fn deposit(&self, donor: &ManagedAddress) -> SingleValueMapper<DepositInfo<Self::Api>>; | ||
|
|
||
| #[storage_mapper("fee")] | ||
| fn fee(&self) -> SingleValueMapper<BigUint>; | ||
|
|
||
| #[storage_mapper("feeToken")] | ||
| fn fee_token(&self) -> SingleValueMapper<EgldOrEsdtTokenIdentifier>; | ||
|
|
||
| #[storage_mapper("collectedFees")] | ||
| fn collected_fees(&self) -> SingleValueMapper<BigUint>; | ||
| } |