Contract Level @contractlevel
Chainlink-focused smart contract development that prioritizes security with extensive testing. contractlevel.com Joined December 2024-
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yieldcoin is a simple product, built for anyone the core service is optimal stablecoin yield
yieldcoin is a simple product, built for anyone the core service is optimal stablecoin yield
The best place to start understanding the yieldcoin codebase is the YieldPeer contract. This is inherited by the Parent and Child peers, and implements shared functionality. From here, we can begin following key execution paths for depositing, withdrawing and handling CCIP txs.
The best place to start understanding the yieldcoin codebase is the YieldPeer contract. This is inherited by the Parent and Child peers, and implements shared functionality. From here, we can begin following key execution paths for depositing, withdrawing and handling CCIP txs.
github.com/contractlevel/… modularize fee rate bounds invariant
Securely offering users the highest returns without losing value, and whilst they retain full liquidity - sounds good
We want to take fee in stablecoin (as opposed to yieldcoin) because it is *probably* simpler and less prone to edge cases. The issue with this is: if a user deposits stablecoins on a child chain, when that child is where the active strategy is, stablecoins are never sent…
starting to lean to collecting fees in stablecoin and then depositing back into yieldcoin manually until we have an automated peripheral contract to do it rather than taking fees and depositing in the same operation, which adds complexity
Fee handling requires further simplification. Even though invariants pass in foundry and a fee amount in stablecoin is calculated, certora reveals scenarios where that fee effectively disappears when converted to yieldcoin.
Yieldcoin fees are only implemented in the Parent. We can run our previous Certora specs to make sure the underlying base peer behavior hasn't changed. As expected the underlying behavior still meets our previous specifications, but the Parent-specific behavior has changed
Guaranteed equivalence of simplified contracts sounds like a big deal
Guaranteed equivalence of simplified contracts sounds like a big deal
Running the yield churn strategy tracker. The optimal strategy (from our narrow filters) was Compound V3 USDC on Optimism at 6.91% before changing to Compound V3 USDC on Arbitrum at 11.45% after 641 seconds.
Practising rust with a program that tracks how often the optimal yield generating strategy changes. This will give us an idea for how often automated Chainlink Functions requests to rebalance stablecoins should happen.
doing a lil chainlink-local fork testing
Great article on VRF
Comprehensive stablecoin redemption integrity: TVL should always cover total user deposits and accumulated fees
A min fee rate would be extra lines of code We can achieve the same result by having the divisor match the stablecoin decimals, and reducing the max fee rate constant Current max fee is 1% and min fee is 0.0001%. Fee is taken from the stablecoin deposit amount
A min fee rate would be extra lines of code We can achieve the same result by having the divisor match the stablecoin decimals, and reducing the max fee rate constant Current max fee is 1% and min fee is 0.0001%. Fee is taken from the stablecoin deposit amount
Even though a fee rate is set, as indicated by the ghost tracking state, fees are not being taken, as indicated by the lack of FeeTaken event. Looks like we need a min fee rate in accordance with the min deposit. If deposit is near min and fee rate is too low, 0 fees are taken.
It is often better to go with our intuition because the answer is yes, taking a fee from the share mint amount does cause over/underflow errors. It was still worth exploring this execution path to be sure though.
It is often better to go with our intuition because the answer is yes, taking a fee from the share mint amount does cause over/underflow errors. It was still worth exploring this execution path to be sure though.
if the calculated yieldcoin mint amount ends up being extremely small, ie a couple of wei, will this cause denial of service or other issues, when the fee is taken from this as opposed to from the stablecoin deposit amount? is the question of the week
vm.etch is useful for changing the code of a contract without redeploying the entire infrastructure when writing tests
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