Removing Liquidity using Blastscan

This page gives examples on how to remove liquidity from V2 or V3 pools by using Blastscan instead of the Thruster UI. Thruster does not assume any liability for interactions based on examples.

Users should always research multiple resources when taking actions w/ the blockchain to be well-informed. We provide examples here, but do not have any control over Blastscan nor user input, please interact with caution with Blastscan.

Removing Liquidity from V3 Pools

Step 1: Check Liquidity Amount

1. Acquire Token ID: Locate your token ID on the Portfolio page or the add liquidity transaction page on Blastscan. Or go to your address on Blastscan to look at all available token IDs in your wallet.

Example of where to get token ID.

2. Go to Blastscan: Visit the “Read Contract” tab on the NonfungiblePositionManager contract page on Blastscan.

3. Enter Token ID: Input your tokenID under the ‘13. positions’ section to check the amount of liquidity in the position.

Example of retrieving liquidity amount from token ID. Remember to obtain the correct values yourself, the above image is only an example.

Step 2: Decrease Liquidity

1. Switch to Write Contract tab: Switch to the Write Contract tab on NonfungiblePositionManager contract page on Blastscan.

2. Connect to Web3: Connect to your wallet that holds the V3 position you wish to remove.

Connecting your Web3 wallet to Blastscan.

3. Fill in the Parameters in the Decrease Liquidity Function: Locate the '6. decreaseLiquidity' function and enter the required parameters. Example table below w/ descriptions.

4. *To Calculate amount0Min and amount1Min:

   1. Step 1: Collect Required Inputs:

      • Liquidity (ℓ): Found using the NonfungiblePositionManager contract under the ‘13. positions’ section.

      • Tick Upper (𝑖𝑢): Found using the NonfungiblePositionManager contract under the ‘13. positions’ section.

      • Tick Lower (𝑖𝑙): Found using the NonfungiblePositionManager contract under the ‘13. positions’ section.

      • Current SqrtPriceX96 (𝑃): The current price of the pool, found under the ‘12.slot0’ section of the pool contract.

Obtaining the value of sqrtPriceX96 from slot0 query.

5. Step2-1: In Range Position Calculation: If the position is in range, perform the following formula to calculate the current holdings of token 0 and token 1. See here for technical details.

6. Step 2-2: Out of Range Position Calculation: If the position is out of range, perform the following formula to calculate the current holdings of token 0 and token 1. See here for technical details.

Name	Type	Description	Example:
payableAmount	uint	Amount of ETH to send with the transaction.	0
tokenId	uint	The ID of the position you want to withdraw.	123923
liquidity	uint	The amount of liquidity to remove from the position. Receive the liquidity amount from Step 1	742137615349833101
amount0Min*	uint	Minimum amount of token0 expected out.	359016851604
amount1Min*	uint	Minimum amount of token1 expected out.	36364843152141
deadline	uint	Unix timestamp after which the transaction will revert.	1719336324

Example decreaseLiquidity call on Blastscan. Remember to obtain the correct values yourself, the above image is only an example.

Step 3: Collect Tokens

1. Fill in the Parameters in the Collect function: Locate the '4. collect' function and enter the required parameters. After decreasing liquidity, tokens need to be “collected” to be returned to your wallet. It is important you set the recipient as your wallet, otherwise funds will be lost.

Name	Type	Description	Example
payableAmount	uint	Amount of ETH to send with the transaction.	0
tokenId	uint	The ID of the position you want to withdraw.	123923
recipient	address	Your own wallet address.	0xYourWalletAddress
amount0Max	uint	To claim all available tokens, set the maximum value to 2**128−1 (340282366920938463463374607431768211455) to securely withdraw the full amount.	340282366920938463463374607431768211455
amount1Max	uint	To claim all available tokens, set the maximum value to 2**128−1 (340282366920938463463374607431768211455) to securely withdraw the full amount.	340282366920938463463374607431768211455

Example collect call using Blastscan. Remember to obtain the correct values yourself, the above image is only an example.

Step 4 (Optional): Unwrap WETH to ETH

1. Navigate to the WETH Token Contract: Visit the “Write as Proxy” tab on the WETH Token contract page on Blastscan.

2. Connect to Web3: Connect your wallet that contains the WETH you want to unwrap.

3. Fill in the Parameters in Withdraw Function: Locate the '10. withdraw' function to withdraw ETH and decrease your WETH balance.

Example of withdrawing WETH to ETH. Remember to obtain the correct values yourself, the above image is only an example.

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Removing Liquidity from V2 Pairs

Step 1: Approve the LP token for removing liquidity via the Router

1. Navigate to Thruster LP Token Contract: You can find the Thruster LP Token contract on Blastscan in your add liquidity transaction record. Click 'Write Contract' tab on the LP Token contract page.

2. Connect to Web3: Connect your wallet that contains the V2 position you want to remove.

3. Fill in the Parameters in Approve Function: Locate the '1. approve' function and enter the required parameters.

Name	Type	Description	Example
spender	address	Enter the Router Address. ThrusterRouter (0.30%): 0x98994a9A7a2570367554589189dC9772241650f ThrusterRouter (1.00%): 0x44889b52b71E60De6ed7dE82E2939fcc52fB2B4E	0x44889b52b71E60De6ed7dE82E2939fcc52fB2B4E
value	unit	To authorise the maximum value enter the input to 2**128−1 (340282366920938463463374607431768211455).	340282366920938463463374607431768211455

Example approve call on Blastscan. Remember to obtain the correct values yourself, the above image is only an example.

Step 2: Identify Remove Functions

1. Go to Blastscan: Navigate to the “Write Contract” tab of the contract's page on Blastscan, based on the fee tier.

   1. ThrusterRouter (0.30%) Write Contract.

   2. ThrusterRouter (1.00%) Write Contract.

2. Identify Remove Functions: Based on the tokens you want to remove, identify the right Remove function call.

Name	Description
removeLiquidity	Removes liquidity from an ERC-20⇄ERC-20 pool.
removeLiquidityETH	Removes liquidity from an ERC-20⇄WETH pool and receive ETH.
removeLiquidityETHSupportingFeeOnTransferTokens	Identical to removeLiquidityETH, but succeeds for tokens that take a fee on transfer.

Step 3: Remove Liquidity

1. Connect to Web3: Connect your wallet that contains the V2 position you want to remove.

2. Fill in the Parameters in Remove function: Locate the '4. removeliquidity' function and enter the required parameters.

Name	Type	Description	Example
tokenA	address	A pool token.	0x4300000000000000000000000000000000000004
tokenB	address	A pool token.	0x4300000000000000000000000000000000000003
liquidity*	uint	The amount of liquidity tokens to remove.
amountAMin	uint	The minimum amount of tokenA that must be received for the transaction to proceed without reverting. You can set it to '0' or another number in 256-bit unit format.	0
amountBMin	uint	The minimum amount of tokenA that must be received for the transaction to proceed without reverting. You can set it to '0' or another number in 256-bit unit format.	0
to	address	Recipient of the underlying assets.	0xYourWalletAddress
deadline	uint	Unix timestamp after which the transaction will revert.	1719336324

3. *To Calculate amountAMin and amountBMin:

   1. Multiply your proportion of the liquidity by the reserves in the pool.

      • For example, if getReserves returns 10,000 USDB and 1 WETH, and you are 10% of the pool, then amountAMin and amountBMin should be 1000 USDB and 0.1 WETH multiplied by 0.99 (if you have 1% slippage).

   2. To obtain the liquidity amount number:

      • Step 1: Navigate to the Thruster LP Token contract: Locate the Thruster LP Token contract on Blastscan. Click on 'Read Contract' on the LP Token contract page.

      • Step 2: Enter the parameters and execute the query: Locate the ‘8.balanceOf’ function and enter the required parameters.

      Name	Type	Description	Example
      <input>	address	Recipient of the underlying assets.	0xYourWalletAddress

Example balanceOf call to retrieve the amount of LP tokens owned. Remember to obtain the correct values yourself, the above image is only an example.

Example using removeLiquidity call on Blastscan. Remember to obtain the correct values yourself, the above image is only an example.