Initiate a Pay‑by‑Bank transfer with POST /v2/moneyins/paybybank/transfer/init to receive:

• redirectUrl: Where to send the end‑user for bank selection/authorization
• transactionId: Unique identifier for the transfer

Flow:

1. Initialization:

   • Call POST /v2/moneyins/paybybank/transfer/init.
   
   
   • Transfert type: Indicate if the bank transfer isclassic or instant
     • classic : standard SEPA credit transfer. Funds are credited in 2–3 business days.
     • instant : faster SEPA instant transfer. Funds are credited within 15 minutes if supported by the payer’s bank.

2. Bank Selection:

   • If no bankId was provided, redirect the user to the bank selection page.

3. Authentication & SCA:

   • The user logs in to their chosen bank.
   • They complete Strong Customer Authentication (e.g., fingerprint, app challenge).

4. Payment Review:

   • The user confirms amount, reference, etc., on the bank’s site.

5. Redirect Back:

   • On success → returnUrl
   • On cancellation → cancelUrl
   • On error → errorUrl

Note: All callback URLs must be publicly accessible and reachable by Lemonway’s WebKit.

Important: Whenever you see accountId in a path or body parameter, enter your wallet’s ID.