feat: limit transferAndLock to only be callable by the distributor address
#89
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This PR introduces a
transferAndLockCallerbeing stored as part of the implementation specificLocking.Datastruct.This change is made to prevent operational difficulties for exchanges receiving locked tokens and wrongly crediting users based on the
Transferevent.The
transferAndLockfunction is intended to be used during the claim window period to distribute locked tokens.After the claim window is over, no tokens will remain in the distributor (either because the balance is already
0orburnUnclaimedTokens()has been called). ThetransferAndLockfunction can then be considered as deprecated.On an upgrade to a new implementation, the
transferAndLockCallerwill, by default, become theaddress(0)if the new implementation does not specify it otherwise.