Token sale proposal
Another interesting proposal that can be created within a DAO is the TokenSaleProposal
. This proposal enables the initiation of token sales (a.k.a. tiers) according to certain rules. The main executor should be the TokenSaleProposal
contract, which retains all the created tiers within a DAO it deployed alongside with. Both custom tokens and ERC20Gov
tokens can be sold in tiers. Upon the creation of tiers, sale token amounts are transferred from the treasury to the TokenSaleProposal
contract, so it's necessary to approve this transfer beforehand. Let's create a tier that will sell ERC20Gov
tokens in exchange for the native currency.
In this tier, all optional parameters are configured with zero values. In addition, your proposal has the flexibility to combine different types of whitelists within the participationDetails
parameter, allowing you to restrict certain addresses from participating in a tier, or to set vestingSettings
to provide a gradual withdrawal of tokens for customers, etc.
Once the createTier
proposal is successfully executed, users are given the ability to purchase tokens in this tier by calling the buy
method on the TokenSaleProposal
contract. After the saleEndTime
, they should also use the claim
and vestingWithdraw
methods to withdraw purchased tokens.
The proposals in the GovPool
also allow you to call several useful methods on the TokenSaleProposal
contract. For instance, you can use offTiers
to halt sales in certain tiers, addToWhitelist
if participationDetails
contains ParticipationType.Whitelist
, and recover
to transfer unsold tokens back to the treasury.