MELD Dev Diary 18

Borrowing & Lending

On-chain

• Move withdraw and migrate logic for pool to separate files for better code organization.
• Avoid checking pool min ADA value to reduce execution cost.
• Store required min ADA value for each account inside account datum to simplify logic check while improving UX.
• Assert exact value and datum for account outputs.
• Rewrite applying state change to pool in order to export the function to off-chain.
• Decouple oracle format to easily integrate with different oracles.
• Allow partial liquidation, check close factor when liquidating an account, calculate incentive for liquidator and protocol.

Off-chain

• Add integration tests for contract migration.
• Write API to extract protocol’s state to JSON.
• Add more details to API schema.
• Reset GHC performance build flags.
• Export pool functions to off-chain to avoid duplicate code and avoid unexpected bugs while maintaining duplicate logic on both on-chain and off-chain sides.
• Vendor TxOut converters from plutus-ledger.
• Support querying multiple Accounts’ state.
• Use exported on-chain functions in batcher.
• Implement API to query global state and compute derived data to support frontend.
• Fix Aeson instances for some API types.

Infrastructure

• Modified initial backend infrastructure by introducing additional internal load balancer for microservices.
• Configured Github workflows for building, pushing, and deploying backend microservices.

MELDapp

• Implementation of Faucet system and authorization mechanism for testnet launch.
• Frontend integration to Supply and Borrow protocol.
• Implementation of sending and receiving tokens in MELD wallet.

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