The Close_code hook runs after you have requested to close an account using our Core API.When the customer has decided to close their
account with the bank, so the bank will make an api call to the vault to close it and then the close_code will zero out any accrued interest before the account is
closed.
Hooks in Smart Contract
Notes :
1.
Vault supports interest accrual in multi currency for single account
2.
Any product type can be configured in Vault