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kzg_elixir

2.1.6
2.1.6 2.1.5

Ethereum EIP-4844 KZG trusted setup verification NIF bindings.

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kzg_elixir c_src c-kzg-4844 blst bindings emscripten runnable.html
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c_src/c-kzg-4844/blst/bindings/emscripten/runnable.html 

<!DOCTYPE html>

<html>

<head><meta charset="UTF-8"><title>runnable.html</title></head>

<body>

<script type="text/javascript" src="blst.js"></script>

<div id="output"></div>

<script type="text/javascript">

var output = {

  div: document.getElementById("output"),

  log: function(str) {

    this.div.appendChild(document.createTextNode(str));

    this.div.appendChild(document.createElement("br"));

  }

}



output.log("testing...");



blst['onRuntimeInitialized'] = function() {

  var msg = "assertion";          // this what we're signing

  var DST = "MY-DST";             // domain separation tag



  var SK = new blst.SecretKey();

  SK.keygen("*".repeat(32));



  ////////////////////////////////////////////////////////////////////////

  // generate public key and signature



  var pk = new blst.P1(SK);

  var pk_for_wire = pk.serialize();



  var sig = new blst.P2();

  var sig_for_wire = sig.hash_to(msg, DST, pk_for_wire)

                        .sign_with(SK)

                        .serialize();



  ////////////////////////////////////////////////////////////////////////

  // at this point 'pk_for_wire', 'sig_for_wire' and 'msg' are

  // "sent over network," so now on "receiver" side



  sig = new blst.P2_Affine(sig_for_wire);

  pk  = new blst.P1_Affine(pk_for_wire);



  if (!pk.in_group()) throw "disaster";   // vet the public key



  var ctx = new blst.Pairing(true, DST);

  ctx.aggregate(pk, sig, msg, pk_for_wire);

  ctx.commit();

  if (!ctx.finalverify()) throw "disaster";



  output.log("OK");

}

</script>

</body>

</html>