@vbyte/btc-dev/src/lib/address/script.ts

Batteries-included toolset for plebian bitcoin development

import type { AddressType, ScriptInfo } from '@/types/index.js'

/**
 * Get the address script.
 * 
 * @param script_key  - The script key.
 * @param script_type - The script type.
 * @returns The address script.
 */
export function get_address_script (
  script_key  : string,
  script_type : AddressType
) : ScriptInfo {
  switch (script_type) {
    case 'p2pkh':
      return get_p2pkh_script(script_key)
    case 'p2sh':
      return get_p2sh_script(script_key)
    case 'p2wpkh':
      return get_p2w_pkh_script(script_key)
    case 'p2wsh':
      return get_p2w_sh_script(script_key)
    case 'p2tr':
      return get_p2tr_script(script_key)
    default:
      throw new Error('unrecognized script type: ' + script_type)
  }
}

function get_p2pkh_script (script_key : string) {
  return {
    hex : '76a914' + script_key + '88ac',
    asm : [ 'OP_DUP', 'OP_HASH160', script_key, 'OP_EQUALVERIFY', 'OP_CHECKSIG' ]
  }
}

function get_p2sh_script (script_key : string) {
  return {
    hex : 'a914' + script_key + '87',
    asm : [ 'OP_HASH160', script_key, 'OP_EQUAL' ]
  }
}

function get_p2w_pkh_script (script_key : string) {
  return {
    hex : '0014' + script_key,
    asm : [ 'OP_0', script_key ]
  }
}

function get_p2w_sh_script (script_key : string) {
  return {
    hex : '0020' + script_key,
    asm : [ 'OP_0', script_key ]
  }
}

function get_p2tr_script (script_key : string) {
  return {
    hex : '5120' + script_key,
    asm : [ 'OP_1', script_key ]
  }
}