DFS

Peripheral EOSIO smart contracts for interacting with DFS

Dependencies

• sx.uniswap

Quickstart

#include <sx.dfs/dfs.hpp>
#include <sx.uniswap/uniswap.hpp>

// user input
const asset quantity = asset{10000, symbol{"EOS", 4}};
const uint64_t mid = 17; // EOS/USDT pair

// get dfs info
const auto [ reserve_in, reserve_out ] = dfs::get_reserves( mid, quantity.symbol );
const uint8_t fee = dfs::get_fee();

// calculate out price
const asset out = uniswap::get_amount_out( quantity, reserves_in, reserves_out, fee );
// => "2.6500 USDT"

Table of Content

• STATIC get_reserves
• STATIC get_fee
• STATIC get_rewards

STATIC get_reserves

Get reserves for a pair

params

• {uint64_t} mid - market id
• {symbol} sort - sort by symbol (reserve0 will be first item in pair)
• {name} [code="defisswapcnt"] - code account

returns

• {pair<asset, asset>} - pair of reserve assets

example

const uint64_t mid = 17;
const symbol sort = symbol{"EOS", 4};

const auto [reserve0, reserve1] = dfs::get_reserves( mid, sort );
// reserve0 => "4585193.1234 EOS"
// reserve1 => "12568203.3533 USDT"

STATIC get_fee

Get DFS total fee

params

• {name} [code="defisswapcnt"] - code account

returns

• {uint8_t} - total fee (trade + protocol)

example

const uint8_t fee = dfs::get_fee();
// => 30

STATIC get_rewards

Get rewards for trading

params

• {uint64_t} pair_id - pair id
• {asset} in - input quantity
• {asset} out - out quantity
• {name} [code="defisswapcnt"] - code account

returns

• {asset} = rewards in DFS

example

const uint64_t pair_id = 12;
const asset in = asset{10000, {"EOS", 4}};
const asset out = asset{12345, {"USDT", 4}};

const auto rewards = dfs::get_rewards( pair_id, in, out );
// rewards => "0.123456 DFS"