Migrate EOSJS to Whartfkit.

[whattocode]

Hi guys, I'm new to EOS blockchain development. I have the following code that I initially planned to implement using EOSJS. Now, I'm considering switching to Whartfkit. How can I convert the code for transacting actions using Whartfkit? Will the process be similar?

`async function purchaseAndMintNFT(buyerAccount, nftData, price) {
try {
// Ensure we're connected to a wallet/API
if (!api) {
console.error('Not connected to the wallet/API.');
return;
}

    // Construct the atomic transaction
    const result = await api.transact({
        actions: [
            // Step 1: Payment from buyer to developer
            {
                account: 'eosio.token',
                name: 'transfer',
                authorization: [{
                    actor: buyerAccount,
                    permission: 'active',
                }],
                data: {
                    from: buyerAccount,
                    to: developerAccount,
                    quantity: price,  // e.g., '10.0000 EOS'
                    memo: 'Payment for NFT minting',
                },
            },
            // Step 2: Developer mints the NFT
            {
                account: 'nftcontract',
                name: 'mint',
                authorization: [{
                    actor: developerAccount,
                    permission: 'active',
                }],
                data: {
                    to: developerAccount,  // Initially mint to developer's account
                    nft_data: nftData,     // Details of the NFT being minted
                },
            },
            // Step 3: Developer transfers ownership of minted NFT to buyer
            {
                account: 'nftcontract',
                name: 'transfer',
                authorization: [{
                    actor: developerAccount,
                    permission: 'active',
                }],
                data: {
                    from: developerAccount,
                    to: buyerAccount,
                    nft_id: newlyMintedNftId,  // You'd need a way to identify the newly minted NFT's ID
                },
            }
        ]
    }, {
        blocksBehind: 3,
        expireSeconds: 30,
    });

    console.log('Transaction successful:', result.transactionId);
} catch (error) {
    console.error('Error executing transaction:', error);
}

}
`

`
//this sample code from Whartfkit, only has one action, instead of one action, can pass in {actions:[...], {
blocksBehind: 3,
expireSeconds: 30,
}} ??

async function transact() {
if (!session) {
throw new Error('Cannot transact without a session.')
}
const action = {
account: 'eosio.token',
name: 'transfer',
authorization: [session.permissionLevel],
data: {
from: session.actor,
to: 'abcabc111111',
quantity: '1.2000 EOS',
memo: 'Yay WharfKit! Thank you <3',
},
}
session.transact({ action }, { broadcast: true }).catch((e) => {
console.log('error caught in transact', e)
})
}
`

[whattocode]

ok, I found the document. But, how to apply blocksBehind:3 ??
https://wharfkit.github.io/session/interfaces/SessionArgs.html

[aaroncox]

Took me far too long to notice this post... sorry about that!

I assume you've found the answer already, but to answer, the concept of blocksBehind is removed from Wharf's transact method and it just automatically uses the last irreversible block (a best practice).

We've since published a bunch of documentation for all of this here: https://wharfkit.com/docs/session-kit