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A Bit Sale - Clear dirty bits #585

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Apr 21, 2020
Merged

A Bit Sale - Clear dirty bits #585

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4 changes: 3 additions & 1 deletion solidity/contracts/scripts/FundingScript.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,9 @@ contract FundingScript {

// Verify _extraData is a call to unqualifiedDepositToTbtc.
bytes4 functionSignature;
assembly { functionSignature := mload(add(_extraData, 0x20)) }
assembly {
functionSignature := and(mload(add(_extraData, 0x20)), not(0xff))
}
require(
functionSignature == vendingMachine.unqualifiedDepositToTbtc.selector,
"Bad _extraData signature. Call must be to unqualifiedDepositToTbtc."
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4 changes: 3 additions & 1 deletion solidity/contracts/scripts/RedemptionScript.sol
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Expand Up @@ -41,7 +41,9 @@ contract RedemptionScript {

// Verify _extraData is a call to tbtcToBtc.
bytes4 functionSignature;
assembly { functionSignature := mload(add(_extraData, 0x20)) }
assembly {
functionSignature := and(mload(add(_extraData, 0x20)), not(0xff))
}
require(
functionSignature == vendingMachine.tbtcToBtc.selector,
"Bad _extraData signature. Call must be to tbtcToBtc."
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