hashcash-accept-resources

hashcash-accept-resources is a variable defined in `hashcash.el'.
Its value is

(("artur@Gandalf-Linux" nil))

Documentation:
An association list mapping hashcash resources to payment amounts.
Resources named here are to be accepted in incoming payments. If the
corresponding AMOUNT is NIL, the value of `hashcash-default-accept-payment'
is used instead.

You can customize this variable.