Rewards Vault & Liquidity Mining Pattern

{
  // Rewards Vault with accumulator pattern
  // R4: Reward per token accumulated (scaled by 1e18)
  // R5: Last update height
  // R6: Reward rate per block
  // R7: Total staked amount
  
  val vaultNFT = SELF.tokens(0)._1
  val rewardToken = SELF.tokens(1)._1
  val rewardBalance = SELF.tokens(1)._2
  
  val rewardPerToken = SELF.R4[Long].get
  val lastUpdate = SELF.R5[Int].get
  val rewardRate = SELF.R6[Long].get
  val totalStaked = SELF.R7[Long].get
  
  // Calculate new accumulated rewards
  val blocksPassed = HEIGHT - lastUpdate
  val newRewards = if (totalStaked > 0) {
    blocksPassed * rewardRate * 1000000000000000000L / totalStaked
  } else 0L
  val newRewardPerToken = rewardPerToken + newRewards
  
  // Vault continues with updated state
  val vaultContinues = {
    val newVault = OUTPUTS(0)
    newVault.tokens(0)._1 == vaultNFT &&
    newVault.R4[Long].get == newRewardPerToken &&
    newVault.R5[Int].get == HEIGHT
  }
  
  // Validate stake/unstake/claim operations
  val validOperation = {
    // Check stake boxes in data inputs for reward calculation
    // Implementation depends on staking box structure
    true
  }
  
  vaultContinues && validOperation
}