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| author | Wladimir J. van der Laan <laanwj@gmail.com> | 2015-06-01 11:25:52 +0200 |
|---|---|---|
| committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2015-06-01 11:25:59 +0200 |
| commit | 4f1677b6ba9511bc1195b452f47aa5deb51ef2db (patch) | |
| tree | 0957e0b622eb6db2afd37962848a0e2925ab270c /src | |
| parent | 3e8ccc765a6d02b701ebc40e556e32e4c0613987 (diff) | |
| parent | 0bb43854c7cb77d25d0ee33ed4263659a031dac7 (diff) | |
| download | bitcoin-4f1677b6ba9511bc1195b452f47aa5deb51ef2db.tar.xz | |
Merge pull request #6198
0bb4385 Improve comment explaining purpose of MAX_MONEY constant (Peter Todd)
Diffstat (limited to 'src')
| -rw-r--r-- | src/amount.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/src/amount.h b/src/amount.h index 9212244a88..7dc62edac4 100644 --- a/src/amount.h +++ b/src/amount.h @@ -16,7 +16,15 @@ typedef int64_t CAmount; static const CAmount COIN = 100000000; static const CAmount CENT = 1000000; -/** No amount larger than this (in satoshi) is valid */ +/** No amount larger than this (in satoshi) is valid. + * + * Note that this constant is *not* the total money supply, which in Bitcoin + * currently happens to be less than 21,000,000 BTC for various reasons, but + * rather a sanity check. As this sanity check is used by consensus-critical + * validation code, the exact value of the MAX_MONEY constant is consensus + * critical; in unusual circumstances like a(nother) overflow bug that allowed + * for the creation of coins out of thin air modification could lead to a fork. + * */ static const CAmount MAX_MONEY = 21000000 * COIN; inline bool MoneyRange(const CAmount& nValue) { return (nValue >= 0 && nValue <= MAX_MONEY); } |