…her that makes a call to hash function. for the moment it directly returns the expected hash values for the purposes of testing. addresses issue #56.

#61.

…to the transcript hasher constructor (cf. #61 (comment)); added exception handling in case the buffer length is invalid (cf. #61 (comment))

…h function. the caller must handle it.

…r process since u is not used by the prover anyway. removed the automatic clearing of the hasher buffer inside get_hash. the caller is now responsible to clear the buffer when reusing the same hasher object. see also PR comment #61 (comment) .

…h instead of explicitly checking all valid lengths.

…headers. addresses #61 (comment)

… the class. addresses #61 (comment)

…e last round of the prover. we need to compute u even though we are not using it in the prover in order to make sure that the prover and verifier make exactly the same number of calls to transcript_hasher.get_hash(). addresses PR #61 comment #61 (comment)

… input parameter to the constructor. only the object has access to the buffer now. addresses PR #61 comment #61 (comment)

…; removed redundant comments indicating class constructors' other minor comments formatting

… plonk_example class; addresses #61 (comment) .

…resses PR# 61.

…. see PR #61

…ion parameter to the prover and verifier classes. moved the current transcript_hasher class from files srs.* to its own files under tests, the reason being that its implementation is specific to the bls12-381 curve. set the prover and verifier to be instantiated with this bls12-381-specific implementation of transcript_hasher. this commit addresses steps 2. and 4. from comment #61 (comment) of PR#61.

…hat describes the interface of a common transcript hasher. addresses step 1. from comment #61 (comment) of PR#61.

…cript hasher with a while loop directly finding the correct length; addresses #61 (comment) .

 .

…ne. addresses #61 (comment) .

…tor_transcript_hasher::get_hash(). addresses #61 (comment) .

…bls12_381_test_vector_transcript_hasher initialized in the constructor. addresses #61 (comment) .

…tions in #61 (comment) .

…length and challenge arrays are of same length in transcript hasher constructor; minor edits. addresses lates comments in PR #61 .

…2_381_test_vector_transcript_hasher.cpp to CMakeLists.txt. added several headers to fix compilation errors.