There's a message just arrived on Reuters that says the Central bank of Irans Governor has resigned, but this is denied by the official new agency.
The Bank wants to raise interest rates to stifle inflation but political pressure has seen bank deposits lower than inflation levels, Iranians pulling their deposits to buy foreign currencies esp. the USD
The official inflation rate in Iran is 20% and rising, the Central Bank buying dollars.
Iran will never close the Straits, a casus belli, imagine the pollution caused by a supertanker running into a minefield.