encoding name(ens) for sending register contract

[Mahdimm]

Hi, @shamatar
there is a function in android web3 that encode name for ens like blew

public class NameHash {

    private static final byte[] EMPTY = new byte[32];

    public static byte[] nameHashAsBytes(String ensName) {
        return Numeric.hexStringToByteArray(nameHash(ensName));
    }

    public static String nameHash(String ensName) {
        String normalisedEnsName = normalise(ensName);
        return Numeric.toHexString(nameHash(normalisedEnsName.split("\\.")));
    }

    private static byte[] nameHash(String[] labels) {
        if (labels.length == 0 || labels[0].equals("")) {
            return EMPTY;
        } else {
            String[] tail;
            if (labels.length == 1) {
                tail = new String[] { };
            } else {
                tail = Arrays.copyOfRange(labels, 1, labels.length);
            }

            byte[] remainderHash = nameHash(tail);
            byte[] result = Arrays.copyOf(remainderHash, 64);

            byte[] labelHash = Hash.sha3(labels[0].getBytes(StandardCharsets.UTF_8));
            System.arraycopy(labelHash, 0, result, 32, labelHash.length);

            return Hash.sha3(result);
        }
    }

    /**
     * Normalise ENS name as per the
     * <a href="http://docs.ens.domains/en/latest/implementers.html#normalising-and-validating-names">specification</a>.
     *
     * @param ensName our user input ENS name
     * @return normalised ens name
     * @throws EnsResolutionException if the name cannot be normalised
     */
    static String normalise(String ensName) {
        try {
            return IDN.toASCII(ensName, IDN.USE_STD3_ASCII_RULES)
                    .toLowerCase();
        } catch (IllegalArgumentException e) {
            throw new EnsResolutionException("Invalid ENS name provided: " + ensName);
        }
    }
}

this class NameHash is used for hashing name (ens)
do we have any func like this in you're library?

thanks

[shamatar]

Oh, you mean a Namehash. Do, not yet implemented, although will come together with precompiled bindings to erc20 and erc721

…

________________________________ From: Mahdi Mahjoobe <notifications@github.com> Sent: Saturday, September 1, 2018 3:16:06 PM To: matterinc/web3swift Cc: Alexander; Mention Subject: [matterinc/web3swift] encoding name(ens) for sending register contract (#15) Hi, @shamatar<https://github.com/shamatar> there is a function in android web3 that encode name for ens like blew public class NameHash { private static final byte[] EMPTY = new byte[32]; public static byte[] nameHashAsBytes(String ensName) { return Numeric.hexStringToByteArray(nameHash(ensName)); } public static String nameHash(String ensName) { String normalisedEnsName = normalise(ensName); return Numeric.toHexString(nameHash(normalisedEnsName.split("\\."))); } private static byte[] nameHash(String[] labels) { if (labels.length == 0 || labels[0].equals("")) { return EMPTY; } else { String[] tail; if (labels.length == 1) { tail = new String[] { }; } else { tail = Arrays.copyOfRange(labels, 1, labels.length); } byte[] remainderHash = nameHash(tail); byte[] result = Arrays.copyOf(remainderHash, 64); byte[] labelHash = Hash.sha3(labels[0].getBytes(StandardCharsets.UTF_8)); System.arraycopy(labelHash, 0, result, 32, labelHash.length); return Hash.sha3(result); } } /** * Normalise ENS name as per the * <a href="http://docs.ens.domains/en/latest/implementers.html#normalising-and-validating-names">specification</a>. * * @param ensName our user input ENS name * @return normalised ens name * @throws EnsResolutionException if the name cannot be normalised */ static String normalise(String ensName) { try { return IDN.toASCII(ensName, IDN.USE_STD3_ASCII_RULES) .toLowerCase(); } catch (IllegalArgumentException e) { throw new EnsResolutionException("Invalid ENS name provided: " + ensName); } } } this class NameHash is used for hashing name (ens) do we have any func like this in you're library? thanks — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub<#15>, or mute the thread<https://github.com/notifications/unsubscribe-auth/AGKv9xsB03Thn9w6A2fhTmgGTs8DdSEWks5uWoiWgaJpZM4WWN38>.

[BaldyAsh]

Namehash is implemented in 2.0