scryptc

sCrypt

sCrypt (pronounced “ess crypt”) is a high-level smart contract language for Bitcoin SV. It is designed to facilitate writing smart contract running on chain.

This package contains an sCrypt compiler. Type scrypt --help to see how to use it.

Language Specification

Changelog

sCrypt 0.1.0

05/05/20

• Change b"" for bytes literal to b''

02/14/20

• JavaScript bindings for the compiler: scryptc @npm

• Multiple contracts in one file

• Support import dependencies

• Standard libraries

• Report multiple compiling errors and do not abort at first error

• Support contract "reflection" to obtain current tx the contract runs in

• Support this to access contract variable and method

• Call contract methods

• Make constructor optional

• Public function also returns like other functions, returns (bool) and return true by default if not specified.

• Improve error messages significantly to help identify source of compiling error; also aggregate similar errors to reduce verbosity

• Support *** statement to insert OP_CODESEPARATOR

• Support exit() to terminate contract execution

• Add pack() and unpack() to convert between int and bytes

• Change 0x prefix to denote int literal in hex and b"" for bytes literal

• Rename size() to len()

• Add type PrivKey

• Overload == for int and bytes

• Support OP_PUSHDATA2 and OP_PUSHDATA4

• Improve scryptc CLI

  • output script as json
  • output AST json as well
  • output to a specified directory
  • output dependency ASTs
  • output debug mode for more info, besides script
  • input from stdin

• Numerous bug fixes and refactorings

  • minimally encode int
  • lower S in DER signature
  • throw when OP_PUSHDATA data exceeding 4GB