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At the heart of the deal to end the Middle East war lies a $300 billion fund to rebuild and develop Iran – but so far it is unclear who will foot the bill.

Here’s what we know about the fund and its potential backers.

The memorandum of understanding (MoU) says Washington “undertakes with regional partners to develop a definitive mutually agreed plan with at least $300 billion for the reconstruction and economic development” of Iran.

“The mechanism for the implementation of this plan will be finalised as part of a final deal within 60 days. All required licenses, waivers, and permissions needed for the relevant financial transactions will be granted by the United States of America,” it added.