Field.digits: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/spec/crypto/secp256k1/field.bend as Field
Lines 17-24 of bend-collections@1.0.0.0/spec/crypto/secp256k1/field.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/spec/crypto/secp256k1/field.bend&start_line=17&end_line=24

import Base
import bend-collections@1.0.0.0/spec/lib/common.bend as C

# a number from its little-endian radix-2^16 digits, each scaled by one:
# digits(1, [d0, d1, ...]) = d0 + 2^16 d1 + ...
def digits(+one: Nat, ds: List<&2, Nat>) -> Nat:
  match ds:
    case Nil{}:
      0n
    case d <> dt:
      Nat.add(Nat.mul(one, d), C.shift(16n, digits(one, dt)))

Uses (5):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.mul
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/spec/lib/common.bend&name=shift