Notes

pragma cashscript >= 0.7.1;


// Pay a reward if a sufficiently large claim locks itself longer than the locktimePeriod
contract RewardSaver(

// time lock savings period
int lockTimePeriod,

// the annual reward percentage with 2 decimal places eg. 500 = 5%
int annualPercentReward,

// an valid address for a refund
bytes20 funder

) {

// claim the reward by supplying sufficiently large lockable amount and sufficiently long lock time
function claimReward() {
// Ensure the claim locks itself for long enough
require(tx.locktime >= tx.time + lockTimePeriod);

// Get the total value of the reward
int rewardValue = tx.inputs[this.activeInputIndex].value;

// The annuity factor 52560 is approximately 1 year
int annuityFactor = 52560 / lockTimePeriod;

// The minimum value that must be locked to claim the reward
int minimumLockable = rewardValue / 1 / annualPercentReward * annuityFactor * 100 * 100;

// Ensure the amount being locked is sufficient
require(tx.outputs[0].value >= minimumLockable);


}

// refund to cancel the reward
function refund(pubkey pk, sig s) {
require(hash160(pk) == funder);
require(checkSig(s, pk));
}

}