Presence protocol

Presence Protocol is built on the foundation of Presence (Proof of Attendance Protocol), designed to leverage the power of the Alephium blockchain to provide verifiable proof of event attendance, known as a Presence.

When an event is organized, the organizer can create a unique event on the blockchain. Participants who attend the event can then mint a Presence as a digital proof of their participation. This not only secures attendance records on a scalable, secure blockchain but also opens the door to new ways of engaging communities and rewarding event participation.

Highlights:

• Intuitive & Sleek UI Designed for a seamless user experience.
• Public Event Explorer Browse all publicly listed events with ease.
• User Activity Tracking View events attended and organized by any Presencer.
• Premium Event Access Unlock exclusive events using ALPH or other supported tokens.
• Delegated Payments Option to pay on behalf of users for added convenience.
• Claim Windows Events can only be claimed within a specific time frame, ensuring timely participation.
• One Presence Per Address Enforces unique participation to maintain event integrity.
• NFT Integration Supported by leading platforms like Deadrare and Alphaga for collectible rewards and badges.

Workflows

Contracts fields

PoapFactory

Name	Type	Description
collectionTemplateId	ByteVec	contract template id for collection
poapTemplateId	ByteVec	contract template id for Presence
numMintedCollection	U256	how many events has been created

PoapCollection

Name	Type	Description
nftTemplateId	ByteVec	Contract template id for Presence
maxSupply	U256	How many Presence can be minted
mintStartAt	U256	When mint can start
mintEndAt	U256	When mint will stop
oneMintPerAddress	Bool	allow only one mint per address
poapPrice	U256	Price to mint a Presence
tokenIdPoap	U256	tokenId to use if price is set
eventImage	ByteVec	Image URI or embedded image (< 2 KB)
eventName	ByteVec	Name of the event
description	ByteVec	Description of the event
organizer	ByteVec	Address of the organizer converted to hex string , i.e creator of the event
location	ByteVec	Where the event is taking place
eventStartAt	U256	When the event starts
eventEndAt	U256	When the event ends
amountForStorageFees	U256	total amount of ALPH stored in the contract to pay storage fees on user's behalf
amountPoapFees	U256	amount paid by the users when PoapPrice is set
totalSupply	U256	supply minted

Presence

Name	Type	Description
collectionId	ByteVec	Collection id contract where the NFT is generated from
nftIndex	ByteVec	Index of the NFT, nft id
eventImage	ByteVec	URI where the image is stored (ex: image)
eventName	ByteVec	Name of the event
description	ByteVec	Description of the event
organizer	ByteVec	Address of the organizer converted to hex string , i.e creator of the event
location	ByteVec	Where the event is taking place
eventStartAt	U256	When the event starts
eventEndAt	U256	When the event ends
isPublic	Bool	Public event will show on Explorer
minter	Address	first address to have mint the Presence
isBurnable	Bool	does the Presence can be burned

Metadata format

Based on IDynamicNFT

Trait {
    traitType: b`Event Name`,
    value: eventName
},
Trait {
    traitType: b`Description`,
    value: description
},
Trait {
    traitType: b`Organizer`,
    value: toByteVec!(organizer)
},
Trait {
    traitType: b`Location`,
    value: location
},
Trait {
    traitType: b`Event Start At`,
    value: u256ToString!(eventStartAt)
},
Trait {
    traitType: b`Event End At`,
    value: u256ToString!(eventEndAt)
},
Trait {
    traitType: b`Public Event`,
    value: toByteVec!(isPublic)
}

To be able to show the Presence on NFT platforms, explorer and wallets, the organizer needs to add a json file following the NFT format the chain is using.

Collection

collectionImageUri should receive an URL pointing to the image resource.

Presence

nftImageUri should receive an URL pointing to the image resource.