The Argentine became the club's all-time leading scorer at the weekend, but has been linked with a move away from the Camp Nou in recent months.
Such speculation was denied by the 26-year-old at the weekend, however, while Arroyo has now revealed Barcelona's plans for the forward.
"Leo has said in his own words that he wants to retire at Barca," Arroyo told reporters.
"As we have every other time, we'll make every effort to help Leo complete his career at Barca. In fact, at the [board meeting] we welcomed the new record set as top scorer and reinforced our commitment to ensure Leo's continuity.
"If at 26 he has surpassed Paulino Alcantara, we cannot imagine where it will end."
It is understood that the deal will see Messi surpass Real Madrid's Cristiano Ronaldo as the best-paid player in world football.