add readme

readme.md

@@ -0,0 +1,99 @@
+![BF-STARK (Bitcoin Friendly STARK) powered by Bitlayer]()
+
+BF-STARK  is a Plonky3 based toolkit for verifiying STARK proof on the Bitcoin network. 
+
+
+## Status
+Primitives
+- [x] BF-fields
+- [x] BF-hash and challenger traits
+Scripts
+- [x] BitCommitment
+- [x] Hashes
+  - [x]Blake3
+- [x] 
+FRI: Taptree based FRI prover and verifier
+- [X]Taptree prover
+- [x]Taptree verifier
+- [x]TreeBuilder
+PCS: Taptree based polynomial commitment scheme
+- [] WIP
+## Benchmark
+WIP
+## Known issues
+
+
+## License
+WIP
+
+
+
+
+## Guidance for external contributors
+
+WIP
+### General guidance for your PR
+The PR guidence is very well written by Plonky team so we just borrowed
+
+Obviously PRs will not be considered unless they pass our Github
+CI. The Github CI is not executed for PRs from forks, but you can
+simulate the Github CI by running the commands in
+`.github/workflows/ci.yml`.
+
+Under no circumstances should a single PR mix different purposes: Your
+PR is either a bug fix, a new feature, or a performance improvement,
+never a combination. Nor should you include, for example, two
+unrelated performance improvements in one PR. Please just submit
+separate PRs. The goal is to make reviewing your PR as simple as
+possible, and you should be thinking about how to compose the PR to
+minimise the burden on the reviewer.
+
+
+
+#### The PR fixes a bug
+
+In the PR description, please clearly but briefly describe
+
+1. the bug (could be a reference to a GH issue; if it is from a
+   discussion (on Discord/email/etc. for example), please copy in the
+   relevant parts of the discussion);
+2. what turned out to the cause the bug; and
+3. how the PR fixes the bug.
+
+Wherever possible, PRs that fix bugs should include additional tests
+that (i) trigger the original bug and (ii) pass after applying the PR.
+
+
+#### The PR implements a new feature
+
+If you plan to contribute an implementation of a new feature, please
+double-check with the Polygon Zero team that it is a sufficient
+priority for us that it will be reviewed and integrated.
+
+In the PR description, please clearly but briefly describe
+
+1. what the feature does
+2. the approach taken to implement it
+
+All PRs for new features must include a suitable test suite.
+
+
+#### The PR improves performance
+
+Performance improvements are particularly welcome! Please note that it
+can be quite difficult to establish true improvements for the
+workloads we care about. To help filter out false positives, the PR
+description for a performance improvement must clearly identify
+
+1. the target bottleneck (only one per PR to avoid confusing things!)
+2. how performance is measured
+3. characteristics of the machine used (CPU, OS, #threads if appropriate)
+4. performance before and after the PR
+
+
+### Licensing
+
+Unless you explicitly state otherwise, any contribution intentionally
+submitted for inclusion in the work by you, as defined in the
+#TODO , shall be dual licensed as above, without any
+additional terms or conditions.