How can I make my NFT visible in the NEAR wallet (AssemblyScript)?

NFT
1

I’m working on creating my own NFT contract using AssemblyScript, following the NEP-171 guidelines. I minted an NFT token through my nft_mint method, and the transaction is confirmed on the testnet. Yet, I can’t see the NFT in my wallet’s collectibles section.

Here’s my contract code:

import { PersistentMap } from 'near-sdk-as';
import { Token, TokenMetadata } from './reit-token';

@nearBindgen
class NFTContractMetadata {
  spec: string; // version like "nft-1.0.0"
  name: string; // e.g., "Reit Token"
  symbol: string; // e.g., "REIT"
  icon: string | null;
  base_uri: string | null;
  reference: string | null;
  reference_hash: string | null;
}

@nearBindgen
export class Contract {
  metadata: NFTContractMetadata = {
    spec: 'reit-token-0.0.0',
    name: 'Reit Token',
    symbol: 'REIT',
    icon: null,
    base_uri: null,
    reference: null,
    reference_hash: null,
  };

  owner_id: string;
  tokens_per_owner: PersistentMap<string, Array<string>> = new PersistentMap('tokens_per_owner');
  tokens_by_id: PersistentMap<string, Token> = new PersistentMap('tokens_by_id');
  token_metadata_by_id: PersistentMap<string, TokenMetadata> = new PersistentMap('token_metadata_by_id');

  nft_tokens_for_owner(account_id: string): Array<Token> {
    const tokenIds: string[] = this.tokens_per_owner.getSome(account_id);
    const tokens: Array<Token> = new Array<Token>();
    for (let i = 0; i < tokenIds.length; ++i) {
      const token: Token = this.tokens_by_id.getSome(tokenIds[i]);
      tokens.push(token);
    }
    return tokens;
  }

  nft_mint(token_id: string, metadata: TokenMetadata, receiver_id: string): void {
    const token = new Token(token_id, metadata, receiver_id);
    const tokens: Array<string> = new Array<string>();
    tokens.push(token_id);
    this.tokens_per_owner.set(receiver_id, tokens);
    this.tokens_by_id.set(token_id, token);
    this.token_metadata_by_id.set(token_id, token.metadata);
  }
}

I have integrated the necessary method nft_tokens_for_owner, but it seems the wallet isn’t recognizing my NFTs. Is there something missing in the functions or metadata that the wallet needs to display NFTs correctly?

2

Your contract’s missing key NEP-171 methods that wallets need. You don’t have nft_metadata - wallets call this to verify your contract follows the standard. You’re also missing nft_token to fetch tokens by ID, which most wallets use before showing NFTs. Found another problem in your nft_mint function - you’re creating a new array each time instead of adding to existing tokens. This overwrites previous tokens for that owner. Also, make sure your Token class has the approved_account_ids field (even if empty) since some wallets expect it per NEP-171 specs.

3

u might wanna add the nft_token method for wallets to fetch indiv tokens. also, try changing your spec to “nft-1.0.0” instead of “reit-token-0.0.0” – otherwise, wallets might not pick it up.