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Stake

Staking in volatile and stable pools is slightly different, so we'll show you how to do it in turn.

Harvesting (without additional staking) can be done by interacting with the gauge with the combination [VC,AT_MOST,0] without specifying the lp token, which we'll also show as an example below.

1) Staking USDC-ETH LP.

  • The only difference between Wombat Pool and Volatile Pool is that Wombat Pool has a separate Gauge contract for each token. 

// Stake involves 2 tokens. LP token and VC because it also trigger harvest of $VC token.
Token[] memory tokens = new Token[](2);
tokens[0] = toToken(IERC20(usdc_eth_lp));
tokens[1] = toToken(IERC20(vc));

VelocoreOperation[] memory ops = new VelocoreOperation[](1);
// address usdc_eth_pool = vault.getPair(usdc, eth);
// OP type STAKE(GAUGE). For volatile pools, LP contract itself is a gauge contract. so use pool address for relevant pool address.
// This is different for Wombat Pool, and I will return to that later.
ops[0].poolId = toPoolId(GAUGE,usdc_eth_pool);
ops[0].tokenInformations = new bytes32[](2);
int128 stakeAmount = int128(int256(IERC20(usdc_eth_lp).balanceOf(address(this))));
ops[0].tokenInformations[0] = toTokenInfo(0x00,EXACTLY,stakeAmount);
//we don't know how much VC we'd harvest in this action. so just use AT_MOST 0 .
ops[0].tokenInformations[1] = toTokenInfo(0x01,AT_MOST,0);        
ops[0].data = "";
return execute(tokens, new int128[](2), ops);

2) Harvesting

Quite similar to Staking. Just use only VC in the token info.

//Harvest
Token[] memory tokens = new Token[](1);
tokens[0] = toToken(IERC20(vc));

VelocoreOperation[] memory ops = new VelocoreOperation[](1);
// Similar with Stake, we use op type STAKE with the pool but giving only VC as token info.
// OP type STAKE(GAUGE). For volatile pools, LP contract itself is a gauge contract. so use pool address for relevant pool address.
// This is different for Wombat Pool, and I will return to that later.
ops[0].poolId = poolId(GAUGE,usdc_eth_pool);
ops[0].tokenInformations = new bytes32[](1);
//we don't know how much VC we'd harvest in this action. so just use AT_MOST 0 .
ops[0].tokenInformations[0] = toTokenInfo(0x00,AT_MOST,0);

ops[0].data = "";
return execute(tokens, new int128[](1), ops);

3) Staking stable LP (Wombat pool)

Let's say you are staking USDC_LP from USDC/USDT/DAI-3pool.

2 differences with volatile pool.

  • Use gauge address on poolId instead of lp address.

  • LP token is ERC-1155 , not ERC-20. Should wrap into 'Token' accordingly.

Step1. Getting gauge address

lpTokens() function on the LP contract returns all bytes32 type Token data in order of ERC1155's id. Let's say it's USDC-LP.

You could use this USDC-LP(bytes32) to get bytes32 representation of the underlying assets like USDC.

Or instead, you could always use toToken function on 'src/lib/Token.sol' directly to wrap token into bytes32 type.

Finally, you could query gauge address with this underlying token's bytes32.

STEP2. same job as before

feeling a bit complicated for stableswap? Actually, if you already got the gauge address, you could just skip STEP1 and execute right away just like before.

// Major difference between volatile pool is that Wombat pool has a seperate gauge contract for each tokens.
// You should interact with gauge, not pool to stake.
Token[] memory tokens = new Token[](2);
// Instead of wrapping yourself, you could just query bytes32 from pool's lpTokens() function.
usdc_id_at_lp=0; // let's assume USDC's id at 3poolLP(ERC1155) is 0.
tokens[0] = toToken(ERC1155,usdc_id_at_lp,IERC1155(usdc_lp));
tokens[1] = toToken(IERC20(vc));

VelocoreOperation[] memory ops = new VelocoreOperation[](1);
ops[0].poolId = toPoolId(GAUGE,usdc_gauge);
ops[0].tokenInformations = new bytes32[](2);
int128 stakeAmount = int128(int256(IERC1155(usdc_lp).balanceOf(address(this),usdc_id_at_lp)));
ops[0].tokenInformations[0] = toTokenInfo(0x00,EXACTLY,stakeAmount);
ops[0].tokenInformations[1] = toTokenInfo(0x01,AT_MOST,0);

ops[0].data = "";
return execute(tokens, new int128[](2), ops);

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