Examples with UnsignedByte org.xrpl.xrpl4j.codec.addresses.UnsignedByte used on opensource projects

Example 1 with UnsignedByte

use of org.xrpl.xrpl4j.codec.addresses.UnsignedByte in project xrpl4j by XRPLF.

the class Ed25519KeyPairService method deriveKeyPair.

private KeyPair deriveKeyPair(UnsignedByteArray seed) {
    UnsignedByteArray rawPrivateKey = HashUtils.sha512Half(seed);
    Ed25519PrivateKeyParameters privateKey = new Ed25519PrivateKeyParameters(rawPrivateKey.toByteArray(), 0);
    Ed25519PublicKeyParameters publicKey = privateKey.generatePublicKey();
    // XRPL ED25519 keys are prefixed with 0xED so that the keys are 33 bytes and match the length of sekp256k1 keys.
    // Bouncy Castle only deals with 32 byte keys, so we need to manually add the prefix
    UnsignedByte prefix = UnsignedByte.of(0xED);
    UnsignedByteArray prefixedPrivateKey = UnsignedByteArray.of(prefix).append(UnsignedByteArray.of(privateKey.getEncoded()));
    UnsignedByteArray prefixedPublicKey = UnsignedByteArray.of(prefix).append(UnsignedByteArray.of(publicKey.getEncoded()));
    return KeyPair.builder().privateKey(prefixedPrivateKey.hexValue()).publicKey(prefixedPublicKey.hexValue()).build();
}

Example 2 with UnsignedByte

use of org.xrpl.xrpl4j.codec.addresses.UnsignedByte in project xrpl4j by XRPLF.

the class FieldHeaderCodec method decodeFieldId.

protected FieldHeader decodeFieldId(String hex) {
    Preconditions.checkNotNull(hex, "hex cannot be null");
    Preconditions.checkArgument(hex.length() >= 2, "hex must be at least 2 characters");
    List<UnsignedByte> segments = ByteUtils.parse(hex);
    Preconditions.checkArgument(segments.size() <= 3, "hex value is too large");
    if (segments.size() == 1) {
        UnsignedByte first = segments.get(0);
        return FieldHeader.builder().typeCode(first.getHighBits()).fieldCode(first.getLowBits()).build();
    }
    if (segments.size() == 2) {
        UnsignedByte first = segments.get(0);
        UnsignedByte second = segments.get(1);
        if (first.getHighBits() == 0) {
            return FieldHeader.builder().fieldCode(first.getLowBits()).typeCode(second.asInt()).build();
        } else {
            return FieldHeader.builder().typeCode(first.getHighBits()).fieldCode(second.asInt()).build();
        }
    }
    return FieldHeader.builder().typeCode(segments.get(1).asInt()).fieldCode(segments.get(2).asInt()).build();
}

Example 3 with UnsignedByte

use of org.xrpl.xrpl4j.codec.addresses.UnsignedByte in project xrpl4j by XRPLF.

the class AmountType method toJson.

@Override
public JsonNode toJson() {
    if (this.isNative()) {
        byte[] rawBytes = toBytes();
        rawBytes[0] &= 0x3f;
        BigInteger value = new BigInteger(rawBytes);
        if (!this.isPositive()) {
            value = value.negate();
        }
        return new TextNode(value.toString());
    } else {
        BinaryParser parser = new BinaryParser(this.toHex());
        UnsignedByteArray mantissa = parser.read(8);
        final SerializedType<?> currency = new CurrencyType().fromParser(parser);
        final SerializedType<?> issuer = new AccountIdType().fromParser(parser);
        UnsignedByte b1 = mantissa.get(0);
        UnsignedByte b2 = mantissa.get(1);
        boolean isPositive = b1.isNthBitSet(2);
        String sign = isPositive ? "" : "-";
        int exponent = ((b1.asInt() & 0x3f) << 2) + ((b2.asInt() & 0xff) >> 6) - 97;
        mantissa.set(0, UnsignedByte.of(0));
        mantissa.set(1, UnsignedByte.of(b2.asInt() & 0x3f));
        BigDecimal value = new BigDecimal(new BigInteger(sign + mantissa.hexValue(), 16)).multiply(new BigDecimal("1e" + exponent)).stripTrailingZeros();
        assertIouIsValid(value);
        Amount amount = Amount.builder().currency(currency.toJson().asText()).issuer(issuer.toJson().asText()).value(value.toPlainString()).build();
        return objectMapper.valueToTree(amount);
    }
}

Example 4 with UnsignedByte

use of org.xrpl.xrpl4j.codec.addresses.UnsignedByte in project xrpl4j by XRPLF.

the class AmountType method getAmountBytes.

private UnsignedByteArray getAmountBytes(BigDecimal number) {
    BigInteger paddedNumber = MathUtils.toPaddedBigInteger(number, 16);
    byte[] amountBytes = ByteUtils.toByteArray(paddedNumber, 8);
    amountBytes[0] |= 0x80;
    if (number.compareTo(BigDecimal.ZERO) > 0) {
        amountBytes[0] |= 0x40;
    }
    int exponent = MathUtils.getExponent(number);
    if (exponent > 80 || exponent < -96) {
        throw new IllegalArgumentException("exponent out of range");
    }
    UnsignedByte exponentByte = UnsignedByte.of(97 + exponent - 15);
    amountBytes[0] |= exponentByte.asInt() >>> 2;
    amountBytes[1] |= (exponentByte.asInt() & 0x03) << 6;
    return UnsignedByteArray.of(amountBytes);
}