correct format of SaleArgs parameter for nft_approve msg

Question

I am having trouble setting a correct message/sale_condition with the contract from the nft-tutorial. My code is as follows;

    const price = parseNearAmount('1');
    let sale_conditions = {
      near: price
    };

    let args = {
      token_id: tokenId,
      account_id: marketId,
      msg: JSON.stringify({ sale_conditions })
    }

    let GAS = "200000000000000";
    let deposit = parseNearAmount('0.6');
    
    await contract.nft_approve(args, GAS, deposit);

But I keep getting the following error

{"index":0,"kind":{"ExecutionError":"Smart contract panicked: panicked at 'Not valid SaleArgs: Error(\"invalid type: map, expected a string\", line: 1, column: 19)', src/nft_callbacks.rs:78:50"}}

I have checked the arguments and as far as I can tell they are a string format. Any ideas what I am doing wrong?

Answer 1

I assume you are following this tutorial https://docs.near.org/docs/tutorials/contracts/nfts/approvals#marketplace-integrations

I think maybe you need to edit the sale_condition to the appropriate format

const price = parseNearAmount('1');
let sale_conditions = price; // updated this line to match expected format for cross contract call

let args = {
  token_id: tokenId,
  account_id: marketId,
  msg: JSON.stringify({ sale_conditions })
}

let GAS = "200000000000000";
let deposit = parseNearAmount('0.6');

await contract.nft_approve(args, GAS, deposit);

args will then look something like this:

{token_id: 'someTokenId', account_id: 'someAccountId', msg: '{"sale_conditions":1YoctoNear}'}

The tutorial expects this format for msg, as it's passed to a cross-contract call to this contract, and sale_conditions is expected to be of the type: SalePriceInYoctoNear, which is defined to be a U128 (link to repo)