ERCs

ERC-2981 — NFT Royalty Standard

eips.ethereum.org/EIPS/eip-2981

A standard way for NFTs to declare a royalty: given a sale price, the contract returns the royalty recipient and the amount.

import { eip155_1 } from "@ethernauta/chain/eip155-1";
import { AddressSchema, Uint256Schema } from "@ethernauta/core";
import { royaltyInfo } from "@ethernauta/erc/2981";
import { eth_call } from "@ethernauta/eth";
import { contract, create_reader, encode_chain_id, http } from "@ethernauta/transport";
import { parse } from "valibot";

const CHAIN_ID = encode_chain_id({ namespace: "eip155", reference: eip155_1.chainId });
const reader = create_reader([
  { chainId: CHAIN_ID, transports: [http("https://ethereum-rpc.publicnode.com")] },
]);
const collection = parse(AddressSchema, "0xBC4CA0EdA7647A8aB7C2061c2E118A18a936f13D");

const callable = royaltyInfo({
  tokenId: parse(Uint256Schema, "0x1"),
  salePrice: parse(Uint256Schema, "0xDE0B6B3A7640000"),  // 1 ether
})(contract({ chain_id: CHAIN_ID, to: collection }));
const result_bytes = await eth_call([{ to: callable.to, input: callable.data }])(reader({ chain_id: CHAIN_ID }));
const info = callable.decode(result_bytes);
// → [Address, Uint256]

Surface

Interface ID

0x2a55205a — supports detection via ERC-165.

See also

• ERC-721, ERC-1155 — typical hosts.