extends solana/caip19

[qbig]

---

namespace-identifier: solana-caip19
title: Solana Namespace - Asset
author: Qiao Liang (@qbig)
discussions-to:
status: Draft
type: Standard
created: 2022-06-01
updated: 2022-06-01
requires: ["CAIP-2", "CAIP-10", "CAIP-19", "CAIP-30"]

CAIP-19

For context, see the CAIP-19 specification.

Rationale

On solana, all contracts are stateless and state is instead represented using "accounts". More specifically, all fungible and non-fungible tokens are using the same instance of token contracts and for each token:

• 1 single global "mint" account instance is used for the global data like "total supply".
• each token account represent an account balance belong to a certain address.

And the difference between fungible token and non-fungible token is that non-fungible token mint has a total supply of 1 and zero decimal place.
But both asset type can be identified by their "mint" account.
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Syntax

After the CAIP-2 namespace+chainID, a slash defines an asset_namespace and an asset_reference. And since both fungible and non-fungible tokens can be identified using the mint account, we could use token, nft as the namespace and the address of the mint account as the reference.

Reference	Equivalent to	See also
token	ERC20 Token	Metaplex Fungible
nft	ERC721	Metaplex NonFungible

Examples

# One Solana Mainnet NFT：Pesky Penguins #398
solana:4sGjMW1sUnHzSxGspuhpqLDx6wiyjNtZ/token:Fz6LxeUg5qjesYX3BdmtTwyyzBtMxk644XiTqU5W3w9w
# Solana Mainnet USDC
solana:4sGjMW1sUnHzSxGspuhpqLDx6wiyjNtZ/token:EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v

References

Copyright

Copyright and related rights waived via CC0.

[qbig]

updated using spl-token as asset namespace

[qbig]

@bumblefudge could you take another look?

[qbig]

updated using token as asset namespace

[felipe-chamas]

I think it'd also be nice if you could include the CAIP-22 proposal. I think your issue is titled with CAIP-19, but the ERC721 example with TokenId is based on CAIP-22

[obstropolos]

@qbig - we can move to get this in - can you add a quick description to the PR as well?

[qbig]

@obstropolos could you take a look when it's convenient?