Revert "Ping pong pret, plus qu'à faire marcher"

This reverts commit 19db53e8d252496dc54930c8b5b24c011572191b.
Revert "Rajout du test du deuxieme send"

This reverts commit 2732ad31f8545dda105864ba5380298bdc1f71e9.
conflict
conflict again
ok now