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

Flow:

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.
Bank Selection:
- If no bankId was provided, redirect the user to the bank selection page.
Authentication & SCA:
- The user logs in to their chosen bank.
- They complete Strong Customer Authentication (e.g., fingerprint, app challenge).
Payment Review:
- The user confirms amount, reference, etc., on the bank’s site.
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.