Merge pull request #21 from optimism-java/hash

fix: merkleize method

Author: GrapeBaBa

src/spec_tests/ssz_static/root.zig

@@ -64,7 +64,7 @@ const CommonUnion = union {
     // BeaconBlock: types.BeaconBlock,
     BeaconBlockHeader: types.BeaconBlockHeader,
     Checkpoint: types.Checkpoint,
-    // Deposit: types.Deposit,
+    Deposit: types.Deposit,
     DepositData: types.DepositData,
     DepositMessage: types.DepositMessage,
     Eth1Block: types.Eth1Block,

src/ssz/ssz.zig

@@ -902,7 +902,10 @@ pub fn merkleize(chunks: []chunk, limit: ?usize, out: *[32]u8) anyerror!void {
             if (size / 2 < chunks.len) {
                 try merkleize(chunks[size / 2 ..], size / 2, &buf);
                 hasher.update(buf[0..]);
-            } else hasher.update(hashes_of_zero[size / 2 - 1][0..]);
+            } else {
+                const power = std.math.log2(size);
+                hasher.update(hashes_of_zero[power - 1][0..]);
+            }
             hasher.final(out);
         },
     }