[E-Lang] ERTP-aware MintMaker

[hal@finney.org]

Steve Jenson writes:
>                 to compareTo(other) :any {  
>                     quantity compareTo(other.quantity)
>                 }  
>                 to transfer(var src,var dest) { 
>                     src := issuer vouch(src)
>                     dest := issuer vouch(dest)
>                     unsealer unseal(src.decr)(quantity)
>                     unsealer unseal(dest.incr)(quantity)
>                 }

Maybe it would be a good idea to have the issuer vouch for "other"
in compareTo?  I gather that it is supposed to be another assay.
(I forget why you want to be able to compare the amounts in two assays.)
Probably a fake assay would be detected later but in general it is a
good idea to detect errors as early as possible.

Hal