Whoami

This is an adaptation of the cw-nfts onchain metadata contract to allow for listing of usernames on multiple services via NFT metadata.

pub struct Metadata {
    pub image: Option<String>,
    pub image_data: Option<Logo>, // see cw-plus CW20
    pub email: Option<String>,
    pub external_url: Option<String>,
    pub public_name: Option<String>,
    pub public_bio: Option<String>,
    pub twitter_id: Option<String>,
    pub discord_id: Option<String>,
    pub telegram_id: Option<String>,
    pub keybase_id: Option<String>,
    pub validator_operator_address: Option<String>,
    pub contract_address: Option<String>, // marks this as executable
    pub parent_token_id: Option<String>, // for paths/nested tokens
    pub pgp_public_key: Option<String>, // exactly what you think it is
}

Disclaimer

WHOAMI IS PROVIDED “AS IS”, AT YOUR OWN RISK, AND WITHOUT WARRANTIES OF ANY KIND. No developer or entity involved in creating the WHOAMI UI or WHOAMI smart contracts will be liable for any claims or damages whatsoever associated with your use, inability to use, or your interaction with other users of WHOAMI, including any direct, indirect, incidental, special, exemplary, punitive or consequential damages, or loss of profits, cryptocurrencies, tokens, or anything else of value.

Developer documentation

Below is an outline of the functionality in this contract.

Minting

Minting is governed by a fee:

• Base fee: charged for every mint (optional, and updateable)
• Surcharge: charged for short usernames (optional, configurable and updateable)

These two added together forms the mint_fee. This is divided between:

1. The admin address (which could point to a multisig or DAO)
2. Burning

The burn percentage is configured at instantiation time.

Dev quickstart

Bootstrap the project like so:

./scripts/deploy_local.sh juno16g2rahf5846rxzp3fwlswy08fz8ccuwk03k57y

To use the account configured by the deploy script import the account in ./scripts/test-user.env into your keplr wallet.

Mapping address -> username

There is an additional query message that allows for an owner set alias to be returned.

This will return StdError::NotFound if there is no Primary Alias. Generally speaking, this error condition will only be hit if a user has only Paths, but no Base Tokens. This is an edge case that can happen if a user has had a token transferred to them (e.g. after a sale).

PrimaryAlias { address: String }

This returns:

// returns a token_id (i.e. a username)
#[derive(Serialize, Deserialize, Clone, PartialEq, JsonSchema, Debug)]
pub struct PrimaryAliasResponse {
    pub username: String,
}

Its default behaviour is to return the last NFT in the list owned by the address (LILO). Alternatively, the user can set a primary alias.

Setting a primary alias

An owner might have multiple NFTs.

Setting a primary alias is done via a new ExecuteMsg variant. On burn, transfer_nft or send_nft, this entry will be cleared from storage.

UpdatePrimaryAlias {
    token_id: String,
},

Other query strategies

It is possible also to use token_info and pass in a limit of 1, to match the default behaviour of the PrimaryAlias query message.

Tokens {
    owner: String,
    start_after: Option<String>,
    limit: Option<u32>,
}

Mapping username -> address

Use AddressOf to get the address linked to a token. This can be used as an alias for OwnerOf with fewer requirements.

Crucially, however, it also returns contract_address and validator_address from the meta fields. In some cases, it's likely that you actually want either the owner's address, or a contract_address, if found.

AddressOf {
    token_id: String,
    contract_address: Option<String>,
    validator_address: Option<String>,
},

If you're a fan of just using the NFT implementation - use owner_of. This also allows you to specify expiry.

OwnerOf {
    token_id: String,
    include_expired: Option<bool>,
},

The mapping of username -> address is in practice simply the link between token_id (the string username) and the owner. As/when the username is transferred or sold, this is updated with no additional computation required.

Paths

Although it is complex to do UI for, and most users don't seem to need it, subdomains are supported in this first version. We call them Paths.

It is important to note that while minting is governed by a fee, Paths can be minted for free (other than gas etc) by the owner of the Base Token.

• Minting is done via MintPath
  • When minting, only pass in the token_id you want to mint as a Path. The parent is automatically resolved and prepended by the contract.
  • i.e. for jeffvader as parent_token_id pass in projects as a token_id to mint_path. You will get back jeffvader::projects.
• Base name tokens that are not Paths can be queried with BaseTokens
• Paths (and not Base tokens) can be queried with Paths
• Paths nested under a token can be queried with PathsForToken

Getting a full path

For resolving a full path, selecting a parent, or working with subdomains, you will want to resolve the tree of parent_token_ids that a token has.

The query for this is GetFullPath:

GetFullPath { token_id: String }

This returns:

#[derive(Serialize, Deserialize, Clone, PartialEq, JsonSchema, Debug)]
pub struct GetPathResponse {
    pub path: String,
}

Where path will likely be something::like::this made up of nested tokens delimited by slashes. Although it is very unlikely people will do so other than as a flex, normal tokens can be nested. They are delineated by /, such that jeffvader/vehicles::tie-fighter is:

• jeffvader (Base Token)
• vehicles (Base Token)
• vehicles::tie-fighter (Path)

Note that only these three are resolvable without any recursive lookups. jeffvader/vehicles::tie-fighter would require the UI to recurse, as it is a compound name.

This is why in general, UIs should probably not allow Base Tokens to be nested, unless there's some amazing use case we've not thought of.

Make sense? Cool.

Getting the Token ID for a parent

With the following query, you pass in a token's ID, and get back the ID of their parent, if it exists.

Will return StdError::NotFound if there is no parent.

GetParentId {
    token_id: String,
}

Getting the NFT info for a parent

With this, you return the NftInfoResponse for a parent.

Will return StdError::NotFound if there is no parent.

GetParentInfo {
    token_id: String,
}