The transfer could violate federal law banning US candidates from receiving foreign funds.
"There is an agreement over many points," a senior Egyptian source said, adding the negotiations will be back in Cairo on Thursday.
Today the once fabulously wealthy African country has become an economic basket case unable to finance its foreign debt of about $165b nor feed its burgeoning population of 114 million people.
During the campaign for the 2023 election, which Sisi won with nearly 90% of the vote, Tantawy said dozens of family members and allies were arrested.
The two men met amid a flurry of high-level diplomatic conversations, as Egypt and Qatar seek to mediate a deal that would end the war.
International election observers and human rights organizations have levied harsh criticism against Sisi’s government during his presidency.
Egyptians head to the polls on Sunday for a presidential election in which Abdel Fattah al-Sisi is poised to win a third term in power.
While Mideastern leaders focused on prioritizing Palestinian rights for the first time in decades, Western leaders condemned Hamas.
Given his grip on power, Egypt's Sisi will certainly win his third term in office, but he knows that a long, hard, uphill struggle lies ahead.
Israeli bombardments on the Gaza side of the Rafah crossing into Egypt, the main crossing out of Gaza not controlled by Israel, have disrupted operations there.