POL Liquid Staking API

To integrate with POL Liquid Staking, use the smart contract functions and examples below.

Stake POL and claim ankrPOL

`approve(spender, value)`

Lets the PolygonPool smart contract transfer user's POL tokens.

Parameters

spender (address, required) — address of the PolygonPool contract.
value (uint256, required) — amount of POL to be staked.

Smart contract

Example

Testnet live transaction example (opens in a new tab)

`stakeAndClaimCerts(amount)`

Stakes POL and claims ankrPOL for the staked POL.

Parameters

amount (uint256, required) — amount of POL to be staked.

Smart contract

Example

Testnet live transaction example (opens in a new tab)

Unstake ankrPOL and claim POL

`ethUnstakeFee()`

Get the current unstake fee in ETH.

Smart contract

`unstakeCerts(uint256 shares, uint256 fee, uint256 useBeforeBlock, bytes signature)`

Lets the PolygonPool to exchange ankrPOL for POL.

Parameters

payableValue (ETH, required) – amount received querying ethUnstakeFee().
shares (uint256, required) — amount ankrPOL to be unstake.
fee (uint256, required) — legacy param, should be set to 0.
useBeforeBlock (uint256, required) — legacy param, should be set to 0.
signature (bytes, required) — legacy param, should be 0x0.

Smart contract

Example

Testnet live transaction example (opens in a new tab)

Get staking metrics

To integrate Ankr Staking metrics into your dashboards or use metrics like APY in your products, read Liquid Staking Metrics.

Fantom Liquid Staking API Staking Metrics API