for (String str : data.getSignatures()) {
 try {
  addressList.add(verifySignedMessage(data.getTransactionHash(), str));
} catch (SignatureException e) {
throw e;}}
for (String addr : data.getPublicKeys()) {
boolean flag = false;
    for (String str : addressList) {
        if (str.equals(addr)) {
            flag = true;
            break;}}
        if (!flag) {
            return false;}}