Method hashStruct

java/lib/src/main/java/io/github/ccxt/Exchange.java:2495–2503

(String primaryType, Map<String, Object> data, Map<String, List<Map<String, String>>> types)

    }

    private static byte[] hashStruct(String primaryType, Map<String, Object> data, Map<String, List<Map<String, String>>> types) {
        String typeString = encodeType(primaryType, types);
        byte[] typeHash = keccak256(typeString.getBytes(java.nio.charset.StandardCharsets.UTF_8));
        byte[] encodedData = encodeData(primaryType, data, types);
        byte[] buf = new byte[typeHash.length + encodedData.length];
        System.arraycopy(typeHash, 0, buf, 0, typeHash.length);
        System.arraycopy(encodedData, 0, buf, typeHash.length, encodedData.length);
        return keccak256(buf);
    }

    // encodeType per EIP-712: primaryType followed by sorted dependent struct types.
    private static String encodeType(String primaryType, Map<String, List<Map<String, String>>> types) {