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39 lines
1.0 KiB
39 lines
1.0 KiB
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methods {
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totalSupply(uint256) returns uint256 envfree
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}
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/// given two different token ids, if totalSupply for one changes, then
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/// totalSupply for other should not
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rule token_totalSupply_independence(method f)
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filtered {
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f -> f.selector != _burnBatch(address,uint256[],uint256[]).selector
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&& f.selector != _mintBatch(address,uint256[],uint256[],bytes).selector
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&& f.selector != safeBatchTransferFrom(address,address,uint256[],uint256[],bytes).selector
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}
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{
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uint256 token1; uint256 token2;
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require token1 != token2;
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uint256 token1_before = totalSupply(token1);
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uint256 token2_before = totalSupply(token2);
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env e; calldataarg args;
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f(e, args);
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uint256 token1_after = totalSupply(token1);
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uint256 token2_after = totalSupply(token2);
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assert token1_after != token1_before => token2_after == token2_before,
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"methods must not change the total supply of more than one token";
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}
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rule sanity {
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method f; env e; calldataarg args;
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f(e, args);
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assert false;
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}
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