Pool Lifecycle
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Pool Lifecycle
Any user can create a new pool by calling newBPool()
on the BFactory
contract. The caller is set as the controller
or pool owner.
Pools can exist in one of two states: controlled
or finalized
. Pools start in a controlled state and the controller may choose to make the pool finalized by calling finalize()
. Finalize is a one-way transition. While in a controlled state, outside actors cannot add liquidity. A controlled state allows the controller to set the pool's tokens and weights.
BPTs
All pools in Balancer are also ERC20 tokens known as BPTs (Balancer Pool Tokens), which represent proportional ownership in the pool's liquidity. When users add liquidity through joinPool
or joinswap*
they receive BPTs proportional to the amount of assets they are adding to the pool.
Notes
BPTs are an opinionated ERC20 token implementation, and have a few subtle differences. transferFrom
from itself does not require a previous allowance.
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