[bisq-network/bisq] Add hash of dao state (#2532)

[Manfred Karrer]

ManfredKarrer commented on this pull request.



> +        //TODO handle reorgs TODO need to start from gen
+
+        byte[] prevHash;
+        int height = block.getHeight();
+        if (daoStateBlockchain.isEmpty()) {
+            // Only at genesis we allow an empty prevHash
+            if (height == genesisTxInfo.getGenesisBlockHeight()) {
+                prevHash = new byte[0];
+            } else {
+                log.warn("DaoStateBlockchain is empty but we received the block which was not the genesis block. " +
+                        "We stop execution here.");
+                return;
+            }
+        } else {
+            // TODO check if in reorg cases it might be a valid case
+            checkArgument(height > daoStateBlockchain.getLast().getBlockHeight(),

Yes correct. Will change and also error msg.

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