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chequebook: use require keyword

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This commit is contained in:
Alex Beregszaszi 2017-11-04 14:33:47 -05:00
parent c9320fd1b7
commit 57168ad33e
1 changed files with 2 additions and 2 deletions
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4
contracts/chequebook/contract/chequebook.sol
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@ -23,10 +23,10 @@ contract chequebook is mortal {
uint8 sig_v, bytes32 sig_r, bytes32 sig_s) {
// Check if the cheque is old.
// Only cheques that are more recent than the last cashed one are considered.
if(amount <= sent[beneficiary]) return;
require(amount > sent[beneficiary]);
// Check the digital signature of the cheque.
bytes32 hash = keccak256(address(this), beneficiary, amount);
if(owner != ecrecover(hash, sig_v, sig_r, sig_s)) return;
require(owner == ecrecover(hash, sig_v, sig_r, sig_s));
// Attempt sending the difference between the cumulative amount on the cheque
// and the cumulative amount on the last cashed cheque to beneficiary.
uint256 diff = amount - sent[beneficiary];