WIP: Incoporate learnings into a new iteration of AllowanceHolder#246
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WIP: Incoporate learnings into a new iteration of AllowanceHolder#246
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…ons prettier in block explorers
…Cancun and non-Cancun versions)
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…is omitted if there is no selector
e1Ru1o
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Aug 5, 2025
| assembly ("memory-safe") { | ||
| testData := mload(0x40) | ||
| mstore(add(0x24, testData), target) | ||
| mstore(add(0x10, testData), 0x70a08231000000000000000000000000) |
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maybe add the comment we always have mentioning the padding
e1Ru1o
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Aug 5, 2025
| mstore(add(0x24, testData), target) | ||
| mstore(add(0x10, testData), 0x70a08231000000000000000000000000) | ||
| mstore(testData, 0x24) | ||
| mstore(0x40, add(0x60, testData)) |
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Are you doing 0x60 to keep the memory alignment?
e1Ru1o
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| // Pad `returndata` to a multiple of 32 bytes. | ||
| let len := mload(result) | ||
| let m := and(0x1f, len) | ||
| if m { | ||
| mstore(add(add(0x20, result), len), 0x00) | ||
| len := add(sub(0x20, m), len) | ||
| } |
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what made you add this padding here?
e1Ru1o
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Aug 5, 2025
| target := calldataload(add(0x04, data.offset)) | ||
| // `shl(0x08, data.length)` can't overflow because we're going to | ||
| // `calldatacopy(..., data.length)` later. It would OOG. | ||
| let mask := shr(shl(0x08, sub(data.length, 0x04)), 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) |
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Shouldn't this be mul? or shr(0x03, ...)
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| let mask := shr(shl(0x08, sub(data.length, 0x04)), 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) | |
| let mask := shr(mul(0x08, sub(data.length, 0x04)), 0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff) |
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Yeah it should be shl(0x03, ...)
e1Ru1o
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| // We apply the "all but one 64th" rule three times because `target` could | ||
| // plausibly be a proxy. We apply it only three times because we assume only | ||
| // two levels of indirection. | ||
| let remainingGas := shr(0x06, beforeGas) | ||
| remainingGas := add(remainingGas, shr(0x06, sub(beforeGas, remainingGas))) | ||
| remainingGas := add(remainingGas, shr(0x06, sub(beforeGas, remainingGas))) |
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The two levels of indirection will be what? a beacon proxy? So there are 3 calls, this => proxy, proxy => beacon, proxy => implementation? Anything else?
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