Despite Iran's defiant tone, though, there were also signs of an economic toll there.
President Masoud Pezeshkian, in remarks on state television, blamed high inflation on a U.S. blockade of Iranian ports and sanctions on Iran's oil exports.
Trump and Treasury Secretary Scott Bessent each pledged to inflict more financial damage on Iran. Bessent told Newsmax's "Rob Schmitt Tonight" program on Thursday that announcements of more measures against Iran were coming next week.
Tehran calls its enforcement of strait traffic a blockade – the term Washington uses for its threat against Iranian vessels leaving their ports.
"What we're doing is a great service for the world, not only for ourselves ... and we're really doing a great job," Trump said.
Only two vessels passed through the Strait of Hormuz on Friday with no crude oil shipments visible, according to analysis from ship-tracking firm Kpler. Some ships may cross the strait undetected with their transponders off, but the figures are nowhere near the more than 130 ships that traversed it daily before the war.
Vessels that dare navigate the strait without Iranian permission risk missile or drone strikes.
The UAE accused Iran of attacking a third vessel operated by Abu Dhabi National Oil Company that was transiting the strait on Friday, the Emirati state news agency WAM reported, after blaming it for two other incidents involving ADNOC vessels in the strait on Thursday evening.
The United Kingdom Maritime Trade Operations Centre reported a bulk carrier was struck in the hull by an unknown projectile in the strait on Friday. It was not immediately clear if it was referring to the same incident involving the ADNOC vessel.
A tentative June deal to end the war is in tatters.
“We did not have a ceasefire in the first place that we would now want to extend," Araqchi said. "We had ‘the end of the war,’ and now there is a new situation.”