# Integrate Indexed Finance Staking

MultiTokenStaking is our fork of MasterChef V2 and is being used for all of our LP rewards.

Contract: https://etherscan.io/address/0xc46e0e7ecb3efcc417f6f89b940ffaff72556382

[Link to ABI JSON](https://github.com/indexed-finance/indexed-interface/blob/main/src/ethereum/abi/MultiTokenStaking.json)

## Get list of staking tokens and pool info

### Staking Lens Contract

Using the staking lens contract at [0x7b429d737282bd2b2f73d7b7f70c6726fc1b6e26](https://etherscan.io/address/0x7b429d737282bd2b2f73d7b7f70c6726fc1b6e26#code)

[Link to ABI JSON](https://api.etherscan.io/api?module=contract&action=getabi&address=0x7b429d737282bd2b2f73d7b7f70c6726fc1b6e26)

Query `lens.getPools()`

This will return an array of:

{
    uint256 pid; // Pool ID
    address stakingToken; // Token to stake - index or index LP pair
    bool isPairToken; // Single-sided staking or pair
    address token0; // token0 if pair, null if not
    address token1; // token1 if pair, null if not
    uint256 amountStaked; // Exact amount of `stakingToken` staked
    uint256 ndxPerDay; // NDX rewards per day for pool
    string symbol; // token symbol or pair symbol e.g. FFF or FFF/WETH
}

### Subgraph

Using the queries in this file:
https://github.com/indexed-finance/subgraph-clients/blob/master/src/staking/queries.ts

With our subgraph at https://api.thegraph.com/subgraphs/name/indexed-finance/staking

By querying our [staking subgraph](https://api.thegraph.com/subgraphs/name/indexed-finance/staking) with the following gql query:

query allStakingInfo {
  multiTokenStakings(first: 1) {
    id # address of staking contract
    rewardsSchedule # address of contract for calculating rewards
    startBlock # first block rewards were distributed in
    endBlock # last block rewards will be distributed in
    rewardsToken # address of rewards token (NDX)
    totalAllocPoint # denominator for pool reward calculation
    poolCount # number of pools
    pools(first: 100) {
      id # pool ID in the staking contract
      token # staking token address
      symbol # token.symbol()
      name # token.name()
      decimals # token.decimals()
      balance # total amount staked
      isPairToken # false = single-sided staking / true = uni/sushi pair
      token0 # token0 of the pair if `isPairToken`, otherwise null
      token1 # token1 of the pair if `isPairToken`, otherwise null
      allocPoint # allocation of rewards
      lastRewardBlock # last block rewards were accumulated in
      userCount # number of stakers
      updatedAt # timestamp of last update
    }
  }
}

## MultiTokenStaking Queries

### Check pending rewards

function pendingRewards(uint256 pid, address account)

Returns amount of NDX that `account` can claim.

### Check user balance

function userInfo(uint256 pool.pid, address account)

Returns

{
  uint256 amount; // Exact amount of `stakingToken` staked by `account`
  int256 rewardDebt; // Not relevant to integrations
}

## MultiTokenStaking Interactions

### Deposit

function deposit(uint256 pid, uint256 amount, address account)

`account` should be the address of the user unless they wish to deposit on behalf of someone else.

### Withdraw

function withdraw(uint256 pid, uint256 amount, address account)

`account` should be the address of the user unless they wish to withdraw and send the tokens to someone else.

**Note** Does not claim rewards.

### Withdraw and harvest

function withdrawAndHarvest(uint256 pid, uint256 amount, address account)

`account` should be the address of the user unless they wish to withdraw and send the tokens to someone else.

Does claim rewards.

## Claim rewards

function harvest(uint256 pid, address account)

Claims all pending rewards for `account`.