The race to zero on NFT royalties between 2022 and 2024 nearly killed creator economics on-chain. Marketplaces optimized for trader volume over creator earnings, royalties became “optional,” and creators who’d designed their projects around recurring royalty income found themselves with nothing.
The good news is that the technical answer to “how do we actually enforce royalties on-chain” matured in 2024–2025. The patterns now exist. The standards (ERC-721C, OpenSea’s Operator Filter Registry’s eventual replacement, sovereign chain solutions) are real. If you’re building an NFT marketplace or launching an NFT project today, you can do royalties right.
Why royalties were broken
The original approach (EIP-2981) defined a way for an NFT contract to advertise a royalty rate but did not enforce it. The marketplace was responsible for calling the royalty function and routing the percentage to the creator. When marketplaces decided not to honor royalties — because zero royalties attracted more trader volume — creators had no recourse. Their NFT contracts were perfectly fine; the marketplace just ignored the suggestion.
The fundamental problem: a token transfer in ERC-721 has no way to know whether it’s a sale or a gift. The marketplace has the sale information but isn’t required to share it. If marketplaces stop volunteering, royalties stop happening.
The mechanism that works
The technical solution that works is enforcing transfer policy at the token contract level. ERC-721C is the standard that codifies it.
The idea: the NFT contract maintains an allowlist of approved transfer mechanisms. A user-to-user transfer is allowed. A transfer through an approved marketplace is allowed. A transfer through any other mechanism — including marketplaces that don’t honor royalties — reverts at the contract level. The token literally can’t be sold through an unapproved venue.
This means the creator decides which marketplaces their token can trade through, and any marketplace they list on must honor royalties. The economics align.
// Simplified ERC-721C transfer hook
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal {
if (from != address(0) && !approvedTransferValidators[msg.sender]) {
revert UnauthorizedTransfer();
}
}The validator contract enforces the policy. Approved validators are typically marketplaces that have committed (via on-chain configuration, audited code, or both) to honoring the creator’s royalty.
The architecture for a marketplace that respects this
If you’re building a marketplace that wants to be a good citizen in the post-ERC-721C world, the architecture is straightforward:
Royalty resolution at order creation. When a seller lists an item, the marketplace queries the NFT contract for the current royalty info. The royalty rate is fixed at the moment of listing, displayed to the seller, and shown to the buyer.
Settlement that splits the trade. When a buyer purchases, the marketplace contract executes the transfer and splits the proceeds: protocol fee, royalty to the creator, remainder to the seller. All in one atomic transaction. None of these are skippable.
Validator registration. The marketplace contract registers itself as an approved validator on the relevant NFT contracts. For marketplaces operating across many collections, this means tooling to apply for approval programmatically.
Bulk listings and edge cases. Sweeping floors, bulk listings, offers — each needs to handle the royalty logic correctly. The most common bug we see in marketplace audits is a code path (usually an offer/bid flow) that forgot to apply royalty logic.
What this means for marketplace economics
Marketplaces that enforce royalties give up the volume advantage that no-royalty marketplaces had. The honest tradeoff: lower trader volume, but better creator relationships, better long-term collection health, and the moral high ground that’s also a marketing position.
Some marketplace categories where enforced royalties are clearly the right call:
Curated collections. Marketplaces partnering with specific creators or projects. The collection’s value is tied to the creator’s continued involvement; royalty enforcement protects that.
1/1 art. The high end of the NFT market is more about authentication and provenance than trading volume. Royalty-respecting marketplaces (Foundation, SuperRare) have held this segment.
Game items. Game creators need ongoing revenue from their items’ secondary trades; otherwise the game-economy design doesn’t work.
Luxury and physical-redeemable NFTs. The brand value of the underlying asset depends on respecting the brand’s commercial terms.
Categories where enforced royalties are harder:
Speculative trading collections. The 10,000-piece PFP collections where the value is largely about flipping. These segments have been slow to adopt enforced royalties because traders punish marketplaces that enforce them.
Cross-chain marketplaces. Enforcement is per-chain; cross-chain marketplaces that bridge tokens may break the enforcement boundary.
What the protocol layer is doing about it
A few specific protocols worth knowing:
ERC-721C (Limit Break) is the most-deployed enforced-royalty standard. Multiple validator implementations exist; OpenZeppelin has an audited reference.
Royalty Registry — a global on-chain registry of royalty info that’s gradually replacing EIP-2981’s per-contract approach. Solves the problem of where to look for royalty rates when the token contract didn’t deploy them correctly.
Magic Eden’s Default-Allow approach has been pushing back on enforcement, with mixed adoption. As of late 2025, the trend is toward enforcement on serious projects.
OpenSea Sea Drop and similar offer SDK-level integration for new project launches, with royalty enforcement baked in by default.
What we’d do today
For a new NFT project where royalties matter to economics:
- Deploy with ERC-721C from the start. Don’t try to migrate later.
- Whitelist a small set of marketplaces (the ones with the strongest enforcement track records). Be selective.
- Set the royalty rate clearly and stick to it. Frequent changes are confusing and erode trust.
- Plan for the perpetual-royalty primary market: every secondary sale should pay creators. This is the design intent.
For a new marketplace:
- Build royalty enforcement into the protocol from day one. Retrofitting is painful.
- Get listed as an approved validator on as many ERC-721C collections as possible.
- Compete on UX, curation, and creator relationships rather than fee races.
- Think hard about the cross-chain story. The fewer chains you span, the cleaner the enforcement.
The market has matured past the point where “we enforce royalties” is a controversial position. It’s now mostly a question of execution: building the right primitives, integrating with the right standards, and treating creators as the long-term customers they are.
If you’re building an NFT marketplace, a creator-friendly NFT collection, or a custom royalty mechanism, we’d love to talk.