Bonded Stealth TX

name is not final, all suggestions are welcome

How does it work

• keeper calls bond with msg.value
• keeper calls contract with a random _stealthHash
• contract uses validateStealthTx modifier to validateHash with msg.sender, hash and penalty
  • if valid (no one reported it) execution continues.
  • if invalid (hash was reported) msg.sender loses it's bond and execution stops.

Improvements:

• update README (how does it work)

• tests

• check remaining gas on validate hash to avoid gasLimit-error exploit to avoid getting penalized