Grin-Bitcoin Adaptor Signature Atomic Swap update thread

Cobragrin · September 24, 2021, 6:31pm

what is the current development? Gene s last post is 2.5 months before. Review will be made by current repo owners or needs a soft fork etc or independent audit ?
Or another someone to implement to wallets?

Hot-Refrigerator · September 25, 2021, 5:52am

renzokuken · February 8, 2026, 1:45pm

I made some prototype code (as well as I managed to understand it, likely something is missing)

github.com/grinventions/mimblewimble-py

tests/test_atomic_swap_btc.py

e366c7b83


      
          def test_atomic_swap_grin_success():
              ctx = secp256k1_context_create(SECP256K1_CONTEXT_VERIFY | SECP256K1_CONTEXT_SIGN)
          
              seed = bytes.fromhex("7f64b1861b9139c0601f637957826da80bb3773adbc8c70265a0c3edb6fda33b")
              msg = b"grin success tx kernel message"
          
              ORDER = 0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141
          
              def rand_priv():
                  while True:
                      p = os.urandom(32)
                      if secp256k1_ec_seckey_verify(ctx, p):
                          return p
          
              # Alice keys
              kA = rand_priv()   # kernel nonce
              rA = rand_priv()   # kernel blinding factor
              KA = secp256k1_ec_pubkey_create(ctx, kA)
              RA = secp256k1_ec_pubkey_create(ctx, rA)

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ardocrat · February 8, 2026, 3:36pm

In the past @gene made RFC for swaps, some questions by @tromp remained unanswered, Atomic Swaps by GeneFerneau · Pull Request #83 · mimblewimble/grin-rfcs · GitHub

renzokuken · February 8, 2026, 5:32pm

Then let’s figure this out and finish up this RFC. People need swaps!

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Grin-Bitcoin Adaptor Signature Atomic Swap update thread

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