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authorRemco Bloemen <remco@wicked.ventures>2018-06-14 00:36:56 +0800
committerRemco Bloemen <remco@wicked.ventures>2018-06-23 19:53:38 +0800
commit5c612a186f6b6282323bc7172de22f43c511b8e4 (patch)
treecb86ed7e87493b1f50e5c4b516550cd131975d3c /packages/contracts/src
parent943e556f43a328dbb606567b06392851ba4ec3de (diff)
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Clean high bits in address
Diffstat (limited to 'packages/contracts/src')
-rw-r--r--packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol4
1 files changed, 4 insertions, 0 deletions
diff --git a/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol b/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol
index cbe4f3be1..c443dda8f 100644
--- a/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol
+++ b/packages/contracts/src/contracts/current/utils/LibBytes/LibBytes.sol
@@ -341,6 +341,10 @@ library LibBytes {
// 2. Load 32-byte word from memory
// 3. Apply 12-byte mask to obtain extra bytes occupying word of memory where we'll store the address
let neighbors := and(mload(add(b, index)), 0xffffffffffffffffffffffff0000000000000000000000000000000000000000)
+
+ // Make sure input address is clean.
+ // (Solidity does not guarantee this)
+ input := and(input, 0xffffffffffffffffffffffffffffffffffffffff)
// Store the neighbors and address into memory
mstore(add(b, index), xor(input, neighbors))