MELD Dev Diary 16

Borrowing & Lending

On-chain:

• Transform hardcoded constants in interest rate model into variables configured per asset.
• Restructure storage of asset data on-chain to avoid duplicate storage of asset class.
• Rewrite LTV calculation and synchronize implementations between on-chain and off-chain.
• Optimize cumulative interest rate calculation to reduce execution units.
• Replace non-zero guarantee by positive guarantee when asserting outputs to avoid value normalization.
• Optimize value checker for account outputs.

Off-chain and Testing:

• Implement off-chain to support users repaying or withdrawing all token amounts per request.
• Implement supply and borrow cap check for batching transaction.
• Calculate the minimum Ada UTXO value according to the datum and value when building transaction updating manager and oracle UTXO.
• Improve shutdown handling for services to better handle SIGTERM.
• Implement off-chain API to build liquidation transaction.
• Regroup APIs to avoid confusion.
• Replace query param with capture for account status API and make hard-coded host in lending API docs configurable.
• Implement mock API for oracle to query simulated asset prices.
• Configure stake keys for account and pool contracts to stake locked Ada tokens.
• Add erase-cabal-cache docker to clear corrupted cache.
• Write integration tests for oracle service.
• Write unit tests for liquidation logic on-chain.

MELDapp:

• Implementation of wallet creation with web3auth.
• Backend API specification for historical transactions and asset values with mock up responses.
• FE integration work with landing and borrowing smart contract on Cardano.

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