Too many bitcoins allowed in amount. #2401

While the bitcoin protocol allows only 21 million bitcoins to ever exist, the bitcoin-qt application allows 99999999.99999999 in the amount area. I know that any attempt to send any amount you don't have will fail, But it still seems like a issue that should be fixed. If for no other reason than the principle of not exceeding actual available amounts. :p

This is already implemented: 21000000 is 8 digits. 8 digits after the dot are allowed by the prototocol. Change the unit to anything else and the amount allowed before/after will change.

allaun is referring to the digits before the decimal point - eight integer digits are allowed to be input in the text box in BTC mode, which can be larger than the number of bitcoins in existence. Seven digits would be sufficient to send 9,999,999 bitcoins as an output, still larger than the amount any one entity is likely to ever possess. Remember though, an alt-chain based on Bitcoin code may have many more coins. A little UI thing like this is about a 1 out of 1000 on the importance scale though.