WikiLeaks founder Julian Assange would end his five-year stay in Ecuador's London embassy and hand himself over to British authorities if given assurances he would not face extradition to the United States, his lawyer said Friday.

Assange has been holed up at the embassy since 2012, concerned that a British arrest warrant would result in his extradition to the United States, where he could be tried for revealing state secrets, Daily Mail reported.

Assange would "face up" to surrendering to British authorities who want to arrest him for breaching bail conditions, said his lawyer Carlos Poveda.

"In British justice, he could even be sentenced to three to six months' imprisonment," Poveda said.

"But what is being requested from the legal team is that there is a necessary assurance that after that sentence he will not be extradited to the United States."

This would be "an extremely important condition" for the 47-year-old Australian, the lawyer said.