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Sponsored gas plugin
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| pragma solidity^0.4.19; | |
| // like a less-liquid GasToken | |
| contract Sponsored { | |
| uint256[] wastedSpace; | |
| function sponsor() external { | |
| uint256 len = wastedSpace.length; | |
| wastedSpace.length = len + 5; | |
| wastedSpace[len] = 1; | |
| wastedSpace[len+1] = 1; | |
| wastedSpace[len+2] = 1; | |
| wastedSpace[len+3] = 1; | |
| wastedSpace[len+4] = 1; | |
| } | |
| modifier sponsored { | |
| _; | |
| uint256 len = wastedSpace.length; | |
| if (len != 0) { | |
| wastedSpace[--len] = 0; | |
| wastedSpace[--len] = 0; | |
| wastedSpace[--len] = 0; | |
| wastedSpace[--len] = 0; | |
| wastedSpace[--len] = 0; | |
| wastedSpace.length = len; | |
| } | |
| } | |
| } |
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