Ensure that balance/value is checked for as 128 bits and not 64 bits

[axic]

Part of #190.

[axic]

@hugo-dc here's a fix if you want to try

[hugo-dc]

Still getting an error:

InternalError: Value exceeds 128 bits.

It finds a non-zero byte in position 13 here:

hera/src/eei.cpp

Line 902 in 3375c7e

if (value.bytes[i])

[axic]

As mentioned in the issue there is still an endianess problem.

[axic]

The code expects it to be littlebig endian but you're sending biglittle endian. I am confused at this point at what endianess we decided on.

[hugo-dc]

LoadMemory loads 16 bytes of data into the first 16 bytes of value. When I send this value: \20\a1\07\00\00\00\00\00\00\00\00\00\00\00\00\00, I get the error I mentioned above (found a non-zero byte at position 13), if I send this value: \00\00\00\00\00\00\00\00\00\00\00\00\00\07\a1\20 I get the same error, now indicating that the non-zero byte is in position 0.

i: 0
InternalError: Value exceeds 128 bits.

If I try to call sending 32 bytes it doesn't work either, because LoadMemory only reads 16 bytes (it would read only zeroes).

[axic]

I'm merging this because it fixes one problem, 64 -> 128 bits. Lets fix endianess separately.