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Remove redundant memory usage in Checkpoints #4540

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merged 8 commits into from
Jan 17, 2024
Merged

Remove redundant memory usage in Checkpoints #4540

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74ef057
Remove redundant memory usage in checkpoints
0xVolosnikov Aug 25, 2023
da54fc0
Remove old comment
0xVolosnikov Aug 28, 2023
03d713e
Update template
0xVolosnikov Aug 25, 2023
984fb3f
Update template
0xVolosnikov Aug 28, 2023
034e507
Add changeset
0xVolosnikov Aug 28, 2023
165d830
Merge branch 'master' into optimize-checkpoints
ernestognw Jan 16, 2024
ded4b3b
Sync generate
ernestognw Jan 16, 2024
6ad3f63
Update .changeset/brown-cooks-dress.md
ernestognw Jan 16, 2024
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5 changes: 5 additions & 0 deletions .changeset/brown-cooks-dress.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
'openzeppelin-solidity': minor
---

`Checkpoints`: removed redundant memory usage
ernestognw marked this conversation as resolved.
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26 changes: 14 additions & 12 deletions contracts/utils/structs/Checkpoints.sol
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Original file line number Diff line number Diff line change
Expand Up @@ -104,7 +104,7 @@ library Checkpoints {
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint224 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
Checkpoint224 storage ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
Expand All @@ -131,21 +131,22 @@ library Checkpoints {
uint256 pos = self.length;

if (pos > 0) {
// Copying to memory is important here.
Checkpoint224 memory last = _unsafeAccess(self, pos - 1);
Checkpoint224 storage last = _unsafeAccess(self, pos - 1);
uint32 lastKey = last._key;
uint224 lastValue = last._value;

// Checkpoint keys must be non-decreasing.
if (last._key > key) {
if (lastKey > key) {
revert CheckpointUnorderedInsertion();
}

// Update or push new checkpoint
if (last._key == key) {
if (lastKey == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint224({_key: key, _value: value}));
}
return (last._value, value);
return (lastValue, value);
} else {
self.push(Checkpoint224({_key: key, _value: value}));
return (0, value);
Expand Down Expand Up @@ -492,7 +493,7 @@ library Checkpoints {
if (pos == 0) {
return (false, 0, 0);
} else {
Checkpoint160 memory ckpt = _unsafeAccess(self._checkpoints, pos - 1);
Checkpoint160 storage ckpt = _unsafeAccess(self._checkpoints, pos - 1);
return (true, ckpt._key, ckpt._value);
}
}
Expand All @@ -519,21 +520,22 @@ library Checkpoints {
uint256 pos = self.length;

if (pos > 0) {
// Copying to memory is important here.
Checkpoint160 memory last = _unsafeAccess(self, pos - 1);
Checkpoint160 storage last = _unsafeAccess(self, pos - 1);
uint96 lastKey = last._key;
uint160 lastValue = last._value;

// Checkpoint keys must be non-decreasing.
if (last._key > key) {
if (lastKey > key) {
revert CheckpointUnorderedInsertion();
}

// Update or push new checkpoint
if (last._key == key) {
if (lastKey == key) {
_unsafeAccess(self, pos - 1)._value = value;
} else {
self.push(Checkpoint160({_key: key, _value: value}));
}
return (last._value, value);
return (lastValue, value);
} else {
self.push(Checkpoint160({_key: key, _value: value}));
return (0, value);
Expand Down
13 changes: 7 additions & 6 deletions scripts/generate/templates/Checkpoints.js
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Original file line number Diff line number Diff line change
Expand Up @@ -121,7 +121,7 @@ function latestCheckpoint(${opts.historyTypeName} storage self)
if (pos == 0) {
return (false, 0, 0);
} else {
${opts.checkpointTypeName} memory ckpt = _unsafeAccess(self.${opts.checkpointFieldName}, pos - 1);
${opts.checkpointTypeName} storage ckpt = _unsafeAccess(self.${opts.checkpointFieldName}, pos - 1);
return (true, ckpt.${opts.keyFieldName}, ckpt.${opts.valueFieldName});
}
}
Expand Down Expand Up @@ -152,21 +152,22 @@ function _insert(
uint256 pos = self.length;

if (pos > 0) {
// Copying to memory is important here.
${opts.checkpointTypeName} memory last = _unsafeAccess(self, pos - 1);
${opts.checkpointTypeName} storage last = _unsafeAccess(self, pos - 1);
${opts.keyTypeName} lastKey = last.${opts.keyFieldName};
${opts.valueTypeName} lastValue = last.${opts.valueFieldName};

// Checkpoint keys must be non-decreasing.
if(last.${opts.keyFieldName} > key) {
if (lastKey > key) {
revert CheckpointUnorderedInsertion();
}

// Update or push new checkpoint
if (last.${opts.keyFieldName} == key) {
if (lastKey == key) {
_unsafeAccess(self, pos - 1).${opts.valueFieldName} = value;
} else {
self.push(${opts.checkpointTypeName}({${opts.keyFieldName}: key, ${opts.valueFieldName}: value}));
}
return (last.${opts.valueFieldName}, value);
return (lastValue, value);
} else {
self.push(${opts.checkpointTypeName}({${opts.keyFieldName}: key, ${opts.valueFieldName}: value}));
return (0, value);
Expand Down
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