Coinscript

Experimental language and compiler for Bitcoin scripts.

Coinscript uses a Javascript like syntax.

Work in progress.

Install

npm install -g coinscript

Usage

Compile source.coinscript

coinscript source.coin > result.out

Generate AST tree

coinscript ast source.coin > ast.json

Options:

--dev Regenerate parser before compiling.

Examples

Standard transaction

function main (sig, pubKey) {
  pubKeyHash = 'somehash....';
  pubKeyHashA = hash160(pubKey);

  assert(equal(pubKeyHash, pubKeyHashA));
  assert(checksig(sig, pubKey));
}

Compiles to (for now! - ugly, I know):

somehash....
OP_PICK 1
OP_HASH160
OP_EQUAL
OP_VERIFY
OP_PICK 1
OP_PICK 1
OP_CHECKSIG
OP_VERIFY

TODO

I probably got the OP codes wrong for now but this is just a matter of tweaking some parameters in the native functions list.

Lots of optimization to do:

For example: Don't OP_PICK uselessly. Some OP codes can be combined together (OP_CHECKSIG OP_VERIFY -> OP_CHECKSIGVERIFY). etc.

Also need a way to encode the intermediate language to binary representation.