isPush()

function extractPushValues(bytecode: Uint8Array): bigint[] {
  const instructions = Opcode.parse(bytecode)
  const values: bigint[] = []

  for (const inst of instructions) {
    if (Opcode.isPush(inst.opcode) && inst.immediate) {
      const hex = '0x' + Array(inst.immediate)
        .map(b => b.toString(16).padStart(2, '0'))
        .join('')
      values.push(BigInt(hex))
    }
  }

  return values
}

function countPushOps(bytecode: Uint8Array): number {
  const instructions = Opcode.parse(bytecode)
  return instructions.filter(inst => Opcode.isPush(inst.opcode)).length
}