<p><b>@ripcurlx</b> commented on this pull request.</p>

<hr>

<p>In <a href="https://github.com/bisq-network/bisq/pull/2787#discussion_r279713652">core/src/main/java/bisq/core/account/sign/SignedWitnessService.java</a>:</p>
<pre style='color:#555'>> +    // witnessOwnerPubKey
+    public Set<SignedWitness> getSignedWitnessSetBySignerPubKey(byte[] signerPubKey) {
+        return signedWitnessMap.values().stream()
+                .filter(e -> Arrays.equals(e.getWitnessOwnerPubKey(), signerPubKey))
+                .collect(Collectors.toSet());
+    }
+
+    //TODO pass list and remove items once processed to avoid endless loop in case of multiple sigs
+    public boolean isValidAccountAgeWitness(AccountAgeWitness accountAgeWitness) {
+        Set<SignedWitness> arbitratorsSignedWitnessSet = getArbitratorsSignedWitnessSet(accountAgeWitness);
+        if (!arbitratorsSignedWitnessSet.isEmpty()) {
+            // Our peer was signed by arbitrator. We only check it at least one is valid and don't need to go further.
+            return arbitratorsSignedWitnessSet.stream().anyMatch(this::verify);
+        } else {
+            Set<SignedWitness> trustedPeerSignedWitnessSet = getTrustedPeerSignedWitnessSet(accountAgeWitness);
+            // We have some SignedWitness singed by any trusted peer and need to see if it is valid and has a
</pre>
<p>typo <code>singed</code> should be <code>signed</code></p>

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