group: Avoid using infinity field directly in other modules #1764

1. 
   real-or-random commented at 7:54 pm on October 28, 2025: contributor

   Minor refactoring to make the abstraction cleaner
2. group: Avoid using infinity field directly in other modules 46c7c8f6a2
3. real-or-random added the label tweak/refactor on Oct 28, 2025
4. 
   hebasto commented at 2:17 pm on November 3, 2025: member

   Concept ACK.

   Some other places still remain:

   0$ git grep -e "\.infinity" -- src ':(exclude)src/group_impl.h'
   1src/ecmult_const_impl.h:    p.infinity = 0;
   2src/tests.c:    SECP256K1_CHECKMEM_CHECK(&ge.infinity, sizeof(ge.infinity));
   3src/tests_exhaustive.c:            zless_gej.infinity = groupj[j].infinity;
   4src/tests_exhaustive.c:                CHECK(group[i].infinity == 0);
   5src/tests_exhaustive.c:                CHECK(generated.infinity == 0);
   

Contributors
real-or-random hebasto

Labels
tweak/refactor