Module challenger

Modules

• duplex
• multi_field32

Traits

• CanCheckWitness
• CanObserveDigest
  Reference: [p3_challenger::CanObserve].
• CanObserveVariable
  Reference: [p3_challenger::CanObserve].
• CanSampleBitsVariable
• CanSampleVariable
• ChallengerVariable
• FeltChallenger
  Reference: [p3_challenger::FieldChallenger].