Adjust the user-set interest rate

POST /v1/actions/liquity/set-rate

Change a trove's user-set annual interest rate. Free after the deployment's cooldown (7 days vanilla); within it, the upfront fee applies to the WHOLE debt — the maxUpfrontFee guard is quoted accordingly. Lower rates increase redemption risk (redemptions hit lowest-rate troves first).

Liquity V2 family is a pooled CDP — one branch per collateral, troves = sub-accounts (troveId, the sub-account id from user data), user-set adjustable interest rates, and a per-branch Stability Pool as the stable-token earn side. Deployments: LIQUITY_V2 (Ethereum) + friendly forks (USDAF, FELIX, NERITE, QUILL, ENOSYS_LOANS, SONETA, EBISU) — all share this surface; per-fork parameters (min debt, rate bounds, gas compensation) come from metadata.

Standard lending actions cover the day-to-day ops for a <DEPLOYMENT>_<chainId>_<COLL_INDEX> market key:

stable-token deposit/withdraw → Stability Pool (earn; isAll withdraw uses the protocol sentinel)
collateral deposit/withdraw → addColl/withdrawColl (pass troveId)
borrow → withdrawBold (pass troveId; upfront-fee guard quoted automatically, override with maxUpfrontFee)
repay → repayBold clamped to entireDebt − minDebt; isAll=true routes to closeTrove (burns the full live debt from the wallet, returns collateral + the WETH gas compensation)

The endpoints in this section handle the trove lifecycle ops that need more than one amount or no amount at all. Fees to know: the upfront borrowing fee (≈7 days of average branch interest on any debt increase) and the premature rate-adjustment fee (same formula on the WHOLE debt when changing the rate within the cooldown). Repaying itself is always free.

Plain-text reference — POST /v1/actions/liquity/set-rate

Request body

Field	Type	Required	Description
`chainId`	string	yes	EVM chain id, as a decimal string. See the `ChainId` schema.
`lender`	string	yes	Protocol identifier. See the `LenderId` schema.
`troveId`	string	yes
`interestRate`	string	yes	New annual rate, WAD
`maxUpfrontFee`	string	no	Optional fee-guard override

Response 200

Field	Type	Description
`success`	`True`
`data`	object	Informational data (quotes, simulation results, etc.)
`actions`	object	Transaction calldata and approvals. Null for quote-only responses (no account provided).
`actions.transactions`	object[]	Pre-trade setup transactions (e.g. e-mode switch, collateral enable). Execute these before the main swap. Empty when no setup is needed.
`actions.transactions[].to`	string	Target contract address
`actions.transactions[].data`	string	Encoded calldata
`actions.transactions[].value`	string	ETH value to send with the transaction
`actions.transactions[].description`	string	Human-readable label. For `alternatives`, this is the aggregator name (e.g. "Paraswap"). For `transactions`, describes the setup action (e.g. "Switch e-mode to 1").
`actions.alternatives`	object[]	DEX aggregator swap transactions sorted by best output (descending). Each entry's `description` is the aggregator name. The client should pick one to execute. Present on loop action endpoints.
`actions.alternatives[].to`	string	Target contract address
`actions.alternatives[].data`	string	Encoded calldata
`actions.alternatives[].value`	string	ETH value to send with the transaction
`actions.alternatives[].description`	string	Human-readable label. For `alternatives`, this is the aggregator name (e.g. "Paraswap"). For `transactions`, describes the setup action (e.g. "Switch e-mode to 1").
`actions.permissions`	object[]	Approval/delegation transactions that must execute before both `transactions` and `alternatives`. Includes ERC20 allowances (targeting the composer contract) and lender borrow/withdrawal delegations (targeting the lending protocol contract directly). Filtered against on-chain state so only missing approvals are returned. Null when no approvals are needed.
`actions.permissions[].to`	string	Target contract address
`actions.permissions[].data`	string	Encoded calldata
`actions.permissions[].value`	string	ETH value
`actions.permissions[].description`	string	Human-readable description of the approval (e.g. "Approve borrow for AAVE_V3", "Approve ERC20")
`actions.permissions[].spender`	string	ERC-20 approve spender (x-chain permissions). Match it against the selected quote's `approvalTarget` — several bridges can share one spender, so do not match by description.

Example response

{
  "success": true,
  "data": {},
  "actions": {
    "transactions": [
      {
        "to": "0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2",
        "data": "0x617ba037000000000000000000000000c02aaa39b2",
        "value": "0",
        "description": "string"
      }
    ],
    "alternatives": [
      {
        "to": "0x87870Bca3F3fD6335C3F4ce8392D69350B4fA4E2",
        "data": "0x617ba037000000000000000000000000c02aaa39b2",
        "value": "0",
        "description": "string"
      }
    ],
    "permissions": [
      {
        "to": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
        "data": "0x617ba037000000000000000000000000c02aaa39b2",
        "value": "0",
        "description": "string",
        "spender": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"
      }
    ]
  }
}

Request

Responses

Rate-adjust transaction

Rate limited. Unauthenticated callers share a per-IP budget; send an x-api-key header to lift it. Retry with exponential backoff.

An upstream data source or protocol origin failed (error.code is ORIGIN_FAILED). error.details carries the per-origin status. This is also what a missing or malformed required parameter currently returns, rather than a 400.

Adjust the user-set interest rate

/v1/actions/liquity/set-rate

Request​

Responses​

Request

Responses