alex-v1-docs/launchpad/using-the-launchpad.md

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Using the Launchpad

Deployment

https://explorer.hiro.so/txid/SP3K8BC0PPEVCV7NZ6QSRWPQ2JE9E5B6N3PA0KBR9.alex-launchpad-v1-1?chain=mainnet

Listing

contract-owner calls create-pool with the following parameters.

• launch-token-trait : the trait reference of project token (e.g. ALEX)
• payment-token-trait : trait reference of payment token (e.g. sUSDT)
• launch-owner : address of the project that launches the project token
• launch-tokens-per-ticket : number of project token per ticket
• price-per-ticket-in-fixed : payment token deposit required per ticket (in 8-digit fixed notation)
• activation-threshold : number of tickets required to activate the launch
• registration-start-height : start (inclusive) block-height of registration period
• registration-end-height : end (inclusive) block-height of registration period
• claim-end-height : end (inclusive) block-height of claim (i.e. lottery) period
• apower-per-ticket-in-fixed : apower required for each ticket (can be a list, in 8-digit fixed notation)
• registration-max-tickets : maximum number of ticket an address can register
• fee-per-ticket-in-fixed : listing fee charged by the platform as percentage of price-per-ticket-in-fixed (in 8-digit fixed notation)

Launch price of project token in payment token = launch-tokens-per-ticket / price-per-ticket-in-fixed

Project Token Transfer

Once the pool is created, and before the registration period starts, launch-owner must call add-to-position with the following parameters:

• launch-id : id of the launch
• tickets : number of tickets launch-owner wants to allocate to
• launch-token-trait : trait reference of project token

Total raise for project token = tickets x launch-tokens-per-ticket x Launch price of token.

Upon calling add-to-position, (tickets x launch-tokens-per-ticket) of project token will be transferred from launch-owner to the contract.

Registration

Participants call register with the following parameters:

• launch-id : id of the launch
• tickets : number of ticket the participant wants to register
• payment-token-trait : trait reference of payment token

Assuming (1) registration period has started, (2) registration period has not ended and (3) the participant is not already registered, the contract will register the participant and:

• burn the required number of apower from the participant's wallet, and
• transfer tickets x price-per-ticket-in-fixed of payment token from the participant's wallet to the contract.

Lottery

The lottery will be drawn one block after the registration ended. The claim/lottery period ends at claim-end block-height.

contract-owner or launch-owner will draw the lottery off-chain using the prescribed rule and call claim repeatedly with the following parameters

• launch-id : id of the launch
• input : list of participants who won the lottery (up to 200)
• launch-token-trait : trait reference of project token
• payment-token-trait : trait reference of payment token

Upon calling claim, assuming (1) registration period has ended, (2) not all tickets are already won, (3) the launch is activated and (4) the claim/lottery period has not ended yet, the contract will verify the validity of input and

• transfer the proceeds of payment token, net of fee, to launch-owner,
• transfer fee to the platform, and
• transfer the appropriate number of project token to the winners.

Refund will be processed by either contract-owner or launch-owner in a similar manner to the claim.