The 30-year-old agreed a new contract with the Catalan giants couple of months ago, but he put pen to paper over the weekend to bring an ended to a protracted deal.
The Argentine is now the highest earner in world football according to Spanish sources.
With Messi’s buyout clause pegged at astronomical €700 million in a new contract which will keep him at the Barcelona for the next four years, the Argentine will earn a 48 million euros annual wage according to Spanish sources.
Meanwhile, Barcelona huge offer for their talisman is to tie him down with a staggering release clause to prevent a repeat of what led to Neymar’s exit.
Amor, a club great now responsible for Barcelona's institutional and sporting relations for the first team, said lessons had been learned after Neymar's departure."We were never nervous," he said after his side's 1-1 draw with Valencia on Sunday.
"Lionel was always very happy at Barca and we want him to retire here, as he wishes.
"We are talking about the clause and with Neymar's experience we must protect ourselves."