RPC interface seems to silently ignore too-large numbers

[dooglus]

I recently tried to list the unspent inputs in my wallet. Since there's no way I know of to ask for "all of them, mature or not", I typically ask for those with between 0 and 9999999999 confirmations, from any address, mature-or-not, like this:

$ clamd listunspent 0 99999999999 | grep amount | wc -l
45

... and that works. But this time I put too many 9's, and it returned an empty list:

$ clamd listunspent 0 999999999999
[
]

It seems the extra 9 must have made the integer overflow, probably making it go negative, and so no outputs were found to match.

That's eleven 9's works, and twelve 9's doesn't.

Indeed, it's at 2^31 that the issue first happens:

$ clamd listunspent 0 $((2**31 - 1)) | grep amount | wc -l
47

$ clamd listunspent 0 $((2**31)) | grep amount | wc -l
0

[creativecuriosity]

In the RPCTypeCheck method @ https://github.com/nochowderforyou/clams/blob/master/src/rpcserver.cpp#L45

string err = strprintf("Expected type %s, got %s",
                                   Value_type_name[t], Value_type_name[v.type()]);
            throw JSONRPCError(RPC_TYPE_ERROR, err);

It appears this bug will display odd/overflow behavior with any RPC command executed with the standard int_type check?

I would assume fixing the call to *.type() might fix the underlying error as opposed to injecting additional checks into the listunspent method itself.

[creativecuriosity]

Ref: https://github.com/bitcoin/bitcoin/issues/6765

[l0rdicon]

This is fixed in the update from json_spirit to UniValue.

https://github.com/nochowderforyou/clams/pull/236

Is the pull request but has not been fully tested yet.

createrawtransaction and signrawtransaction especially need to be tested still.

[tryphe]

This looks fixed so I'm going to close it. The test numbers you see here are 31 signed bits filled and +1.

$ cct listunspent 2147483647 [ ]

$ cct getblockbynumber 2147483647 error code: -1 error message: Block number out of range.

$ cct listunspent 2147483648 error code: -1 error message: JSON integer out of range

$ cct getblockbynumber 2147483648 error code: -1 error message: JSON integer out of range

[tryphe]

I'll try and test createrawtransaction and signrawtransaction soon