FUNCTION
ensure_chain_fee_account
function ensure_chain_fee_account(custom_account_id: byte_array?): accountReturns the fee account for this chain, creating it if needed.
Can only be called from an operation.
Throws if custom_account_id is not null, but the account specified does not exist.
Parameters
- custom_account_id — the ID of the fee account that should be used for this chain, or null if the account can be generated automatically
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