Liquidity Provision - General

General guide for users on how to be a market maker for a Bancor liquidity pool

Liquidity providers are the foundation of any Bancor liquidity pool. The Bancor team and the DeFi community at large have developed a number of ways to make the liquidity provision process as simple as possible.

The team wrote a helpful guide to adding and removing liquidity. Check it out here.

Alternatively, developers can interact with the Bancor contracts directly.

Developers are encouraged to use the guide in the Developer Quick Start section.

Adding Liquidity via Etherscan

The first required piece of information is the Converter contract address for the liquidity pool.

  • Find the SmartToken for the relevant pool on Etherscan and navigate to the Read tab in the contract view.

  • Find the address in the return value for the owner function

For each ERC20 token that you contribute to a liquidity pool, you'll need to approve the transfer amount on each of the contracts.

  • Find the token contract on Etherscan

  • Find the _approve function in the Write section of the contract page

  • Execute the _approve function with the following parameters:

    • _spender: This should be the converter address you found above

    • _amount: This is the number of tokens of this kind of you plan to contribute. Remember to consider the ERC20 decimals (.e.g. 200 DAI would equal 200 ^ 10**18)

Repeat this step for all the relevant tokens.

Now, find the Converter contract on Etherscan. Execute the fund function with the following parameter:

  • _amount: This is the number of liquidity tokens you expect the liquidity pool to issue you. Finding this figure may require some math to calculate the expected liquidity token issuance based on your contribution and the outstanding balance of assets in the pool

Removing Liquidity via Etherscan

  • Find the token contract on Etherscan

  • Execute the liquidate function with the following parameter:

    • _amount: The number of liquidity tokens you would like to redeem for the underlying reserves