---
title: "Repay"
method: POST
path: "/defi/v1/lendborrow/repay"
tags: ["lendborrow"]
---

# Repay

`POST /defi/v1/lendborrow/repay`

## Request

- Base URL: `https://svc.blockdaemon.com`
- URL: `https://svc.blockdaemon.com/defi/v1/lendborrow/repay`
- Auth: API key in header `X-API-Key`

Process the repayment of borrowed assets to the lending protocol. Whether you’re reducing your debt or fully repaying a loan, this endpoint lets you specify the asset, amount, and repayment mode. Customizable gas parameters allow you to tailor the transaction for cost efficiency and timely execution.

> 💡 
**Compute Unit Value:** `255` (Fixed)

## Request body

- LendborrowRepayRequest: The request body for a /defi/v1/lendborrow/repay
  - `lendborrowId` '1000' | '1003' | '1005' | '1200' | '1208' | '1203' | '1204' | '1205' | '1206' | '1207' | '1100' | '1300' | '1302' | '1400' | '1401' | '1402' | '1403' | '1404': The unique ID to specify the lending and borrowing protocol for routing relevant queries or transactions.
  - `asset` string, required: Token address of the asset to repay.
  - `interestRateMode` string, required: Interest rate mode as defined by Aave. Default is 1.
  - `onBehalfOf` string, required: Public address of the user on whose behalf the repay action will be executed.
  - `from` string, required: Blockchain address of the sender. For EVM chains, use a checksummed hex address (e.g., 0xABCDEF...). This address must hold sufficient balance and will sign the transaction.
  - `gas` string: Maximum number of gas units to allocate for the transaction, as an integer string (e.g., '200000'). If omitted, gas is estimated automatically. Note: this is gas units, not wei or gwei.
  - `amount` string, required: Number of tokens, specified in the token's smallest denomination (base units). Do not send human-readable decimal values. Examples: 1 WETH (18 decimals) = "1000000000000000000"; 1 USDC (6 decimals) = "1000000".
  - `gasPriority` string: Specifies the priority level for gas fees (e.g., 'low', 'medium', or 'high'), which influences the transaction speed and cost.
  - `enableFee` boolean: Flag to include a basis points fee transaction alongside the main transaction when set to true.
  - `batchOption` 'EIP-5792' | 'EIP-7702': Transaction batching standard to use. Supported values: 'EIP-5792' (wallet-level batching via wallet_sendCalls) or 'EIP-7702' (EOA code delegation via batcherContract). Requires batcherContract when using EIP-7702.
  - `batcherContract` string: The EOA address of the batcher that will be used to execute the transaction when using EIP-7702 batching. If not provided, the default batcher contract for the chain will be used.
  - `simulate` boolean: When true, dry-runs the transaction batch via eth_simulateV1 and returns a simulate field with status and error on each transaction.
  - `market` string: The market of the asset, such as USDC or WETH. Defaults to USDC.
  - `marketId` string, required: Specifies the market Id of any market in Morpho.

## Response `200`

Successful response

- object
  - `status` number: Numeric status code indicating success or failure of the API call
  - `msg` string: Human-readable message describing the API result or error
  - `data` union
    - object
      - `chainId` string, required: Blockchain network identifier (EVM chain ID, Solana chain name, etc.)
      - `from` string, required: Sender's wallet address
      - `to` string, required: Recipient's wallet address
      - `value` string, required: Amount being transferred or involved in a transaction
      - `gas` string: Gas limit for the transaction
      - `gasPrice` string: Price per gas unit for the transaction
      - `data` string, required: Main payload object or array returned by the API
      - `estimationCheck` union, required: Flag or value indicating transaction fee/estimate status
        - string
        - boolean
      - `referenceId` string, required: Unique ID for tracking a specific transaction or operation
      - `simulate` object: Present when the request used `simulate: true`; eth_simulateV1 summary (omitted when simulation was not run).
        - `status` 'success' | 'failure', required
        - `error` string, nullable, required: Failure reason when status is failure; null when status is success
    - object
      - `createFeeTxn` object, required
        - `chainId` string, required: Blockchain network identifier (EVM chain ID, Solana chain name, etc.)
        - `from` string, required: Sender's wallet address
        - `to` string, required: Recipient's wallet address
        - `value` string, required: Amount being transferred or involved in a transaction
        - `gasPrice` string: Price per gas unit for the transaction
        - `gas` string: Gas limit for the transaction
        - `simulate` object: Present when the request used `simulate: true` with `enableFee: true`; fee leg eth_simulateV1 summary.
          - `status` 'success' | 'failure', required
          - `error` string, nullable, required: Failure reason when status is failure; null when status is success
      - `repayTxn` object, required
        - `chainId` string, required: Blockchain network identifier (EVM chain ID, Solana chain name, etc.)
        - `from` string, required: Sender's wallet address
        - `to` string, required: Recipient's wallet address
        - `value` string, required: Amount being transferred or involved in a transaction
        - `gas` string: Gas limit for the transaction
        - `gasPrice` string: Price per gas unit for the transaction
        - `data` string, required: Main payload object or array returned by the API
        - `estimationCheck` union, required: Flag or value indicating transaction fee/estimate status
          - string
          - boolean
        - `referenceId` string, required: Unique ID for tracking a specific transaction or operation
        - `simulate` object: Present when the request used `simulate: true`; eth_simulateV1 summary (omitted when simulation was not run).
          - `status` 'success' | 'failure', required
          - `error` string, nullable, required: Failure reason when status is failure; null when status is success
    - object
      - `from` string, required
      - `chainId` string, required
      - `referenceId` string, required
      - `methodUsed` 'EIP-5792' | 'EIP-7702', required
      - `calls` object[], required
        - `to` string, required
        - `value` string, required
        - `data` string, required
    - object
      - `from` string, required
      - `chainId` string, required
      - `referenceId` string, required
      - `methodUsed` string, required
      - `to` string, required
      - `data` string, required
      - `value` string, required
      - `batcherContract` string, required

---

[API](https://skmtc.dev/blockdaemon/apis/blockdaemon-defi-api.md) - [All operations](https://skmtc.dev/blockdaemon/apis/blockdaemon-defi-api/llms.txt) - [OpenAPI document](https://skmtc.dev/blockdaemon/apis/blockdaemon-defi-api/revisions/ec053b7c8041?raw)