PaymentProtocol, PaymentSession: remove BIP70 from bitcoinj

It had its time, but nowadays nobody is using it any more. Let's
leave it behind.

core/src/main/java/org/bitcoinj/core/NetworkParameters.java

@@ -26,7 +26,6 @@
 import org.bitcoinj.crypto.DumpedPrivateKey;
 import org.bitcoinj.params.BitcoinNetworkParams;
 import org.bitcoinj.params.Networks;
-import org.bitcoinj.protocols.payments.PaymentProtocol;
 import org.bitcoinj.script.Script;
 import org.bitcoinj.store.BlockStore;
 import org.bitcoinj.store.BlockStoreException;
@@ -50,23 +49,7 @@
  * them, you are encouraged to call the static get() methods on each specific params class directly.</p>
  */
 public abstract class NetworkParameters {
-
-    /** The string used by the payment protocol to represent the main net. */
-    @Deprecated
-    public static final String PAYMENT_PROTOCOL_ID_MAINNET = PaymentProtocol.PAYMENT_PROTOCOL_ID_MAINNET;
-    /** The string used by the payment protocol to represent the test net. */
-    @Deprecated
-    public static final String PAYMENT_PROTOCOL_ID_TESTNET = PaymentProtocol.PAYMENT_PROTOCOL_ID_TESTNET;
-    /** The string used by the payment protocol to represent signet (note that this is non-standard). */
-    @Deprecated
-    public static final String PAYMENT_PROTOCOL_ID_SIGNET = PaymentProtocol.PAYMENT_PROTOCOL_ID_SIGNET;
-    /** The string used by the payment protocol to represent unit testing (note that this is non-standard). */
-    @Deprecated
-    public static final String PAYMENT_PROTOCOL_ID_UNIT_TESTS = PaymentProtocol.PAYMENT_PROTOCOL_ID_UNIT_TESTS;
-    @Deprecated
-    public static final String PAYMENT_PROTOCOL_ID_REGTEST = PaymentProtocol.PAYMENT_PROTOCOL_ID_REGTEST;
-
-    // TODO: Seed nodes should be here as well.
+   // TODO: Seed nodes should be here as well.
 
     protected BigInteger maxTarget;
     protected int port;
@@ -149,13 +132,6 @@ public Network network() {
         return network;
     }
 
-    /**
-     * @return the payment protocol network id string
-     * @deprecated Use {@link PaymentProtocol#protocolIdFromParams(NetworkParameters)}
-     */
-    @Deprecated
-    public abstract String getPaymentProtocolId();
-
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
@@ -194,18 +170,6 @@ public static NetworkParameters of(Network network) {
                 : Networks.find(network).orElseThrow(() -> new IllegalArgumentException("Unknown network"));
     }
 
-    /**
-     * Return network parameters for a paymentProtocol ID string
-     * @param pmtProtocolId paymentProtocol ID string
-     * @return network parameters for the given string paymentProtocolID or NULL if not recognized
-     * @deprecated Use {@link PaymentProtocol#paramsFromPmtProtocolID(String)} (String)}
-     */
-    @Nullable
-    @Deprecated
-    public static NetworkParameters fromPmtProtocolID(String pmtProtocolId) {
-        return PaymentProtocol.paramsFromPmtProtocolID(pmtProtocolId);
-    }
-
     public int getSpendableCoinbaseDepth() {
         return spendableCoinbaseDepth;
     }

core/src/main/java/org/bitcoinj/params/BitcoinNetworkParams.java

@@ -29,7 +29,6 @@
 import org.bitcoinj.core.ProtocolVersion;
 import org.bitcoinj.core.StoredBlock;
 import org.bitcoinj.core.VerificationException;
-import org.bitcoinj.protocols.payments.PaymentProtocol;
 import org.bitcoinj.store.BlockStore;
 import org.bitcoinj.store.BlockStoreException;
 import org.bitcoinj.base.utils.MonetaryFormat;
@@ -117,15 +116,6 @@ public static BitcoinNetworkParams of(BitcoinNetwork network) {
         }
     }
 
-    /**
-     * @return the payment protocol network id string
-     * @deprecated Use {@link PaymentProtocol#protocolIdFromParams(NetworkParameters)}
-     */
-    @Deprecated
-    public String getPaymentProtocolId() {
-        return PaymentProtocol.protocolIdFromParams(this);
-    }
-
     /**
      * Checks if we are at a reward halving point.
      * @param previousHeight The height of the previous stored block