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A SpringBoot Starter solution designed to ensure easy and efficient integration with the Elrond Network using a Reactive API layer.

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package software.crldev.elrondspringbootstarterreactive.domain.transaction;

import org.bouncycastle.util.encoders.Base64;
import static io.netty.util.internal.StringUtil.isNullOrEmpty;

/**
 * Value object for transaction PayloadData
 *
 * @author carlo_stanciu
 */
public final class PayloadData {
    private final byte[] buffer;

    private PayloadData(byte[] buffer) {
        this.buffer = buffer;
    }

    /**
     * Creates an PayloadData object from
     * a data String
     *
     * @param value - data String value
     * @return - an instance of PayloadData
     */
    public static PayloadData fromString(String value) {
        return new PayloadData(value.getBytes());
    }

    /**
     * Creates an PayloadData object from
     * a data encoded String
     *
     * @param encoded - data Base64 encoded String value
     * @return - an instance of PayloadData
     */
    public static PayloadData fromBase64Encoded(String encoded) {
        return isNullOrEmpty(encoded) ? PayloadData.empty() : new PayloadData(Base64.decode(encoded));
    }

    /**
     * Creates an empty PayloadData
     *
     * @return - an instance of PayloadData
     */
    public static PayloadData empty() {
        return new PayloadData(new byte[] {});
    }

    /**
     * Checks if PayloadData is empty
     *
     * @return - boolean
     */
    public boolean isEmpty() {
        return length() == 0;
    }

    /**
     * Retrieves the length of the data
     *
     * @return - length of data buffer
     */
    public int length() {
        return buffer.length;
    }

    /**
     * Retrieves the Base64 encoded data
     *
     * @return - data String Base64 encoded
     */
    public String encoded() {
        return new String(Base64.encode(buffer));
    }

    @Override
    public String toString() {
        return new String(buffer);
    }

    public byte[] getBuffer() {
        return this.buffer;
    }

    @Override
    public boolean equals(final Object o) {
        if (o == this) return true;
        if (!(o instanceof PayloadData)) return false;
        final PayloadData other = (PayloadData) o;
        if (!java.util.Arrays.equals(this.getBuffer(), other.getBuffer())) return false;
        return true;
    }

    @Override
    public int hashCode() {
        final int PRIME = 59;
        int result = 1;
        result = result * PRIME + java.util.Arrays.hashCode(this.getBuffer());
        return result;
    }
}