Merge pull request #13 from KabaDH/topic/add-signet

[FEATURE] Add Signet network for Bitcoin

Author: mrtnetwork

lib/src/bitcoin/address/network_address.dart

@@ -19,6 +19,7 @@ abstract class BitcoinNetworkAddress<T extends BasedUtxoNetwork> {
       case BitcoinNetwork.mainnet:
       case BitcoinNetwork.testnet:
       case BitcoinNetwork.testnet4:
+      case BitcoinNetwork.signet:
         baseAddress = BitcoinAddress.fromBaseAddress(address,
             network: network as BitcoinNetwork);
       case LitecoinNetwork.mainnet:
@@ -66,6 +67,7 @@ abstract class BitcoinNetworkAddress<T extends BasedUtxoNetwork> {
       case BitcoinNetwork.mainnet:
       case BitcoinNetwork.testnet:
       case BitcoinNetwork.testnet4:
+      case BitcoinNetwork.signet:
         baseAddress =
             BitcoinAddress(address, network: network as BitcoinNetwork);
       case LitecoinNetwork.mainnet:

lib/src/models/network.dart

@@ -49,6 +49,7 @@ abstract class BasedUtxoNetwork implements Enumerate {
     BitcoinNetwork.mainnet,
     BitcoinNetwork.testnet,
     BitcoinNetwork.testnet4,
+    BitcoinNetwork.signet,
     LitecoinNetwork.mainnet,
     LitecoinNetwork.testnet,
     DashNetwork.mainnet,
@@ -145,6 +146,10 @@ class BitcoinNetwork implements BasedUtxoNetwork {
   static const BitcoinNetwork testnet4 = BitcoinNetwork._(
       'bitcoinTestnet4', CoinsConf.bitcoinTestNet, 'bitcoin:testnet4');
 
+  /// Signet configuration with associated `CoinConf`.
+  static const BitcoinNetwork signet = BitcoinNetwork._(
+      'bitcoinSignet', CoinsConf.bitcoinTestNet, 'bitcoin:signet');
+
   /// Overrides the `conf` property from `BasedUtxoNetwork` with the associated `CoinConf`.
   @override
   final CoinConf conf;

lib/src/provider/constant/constant.dart

@@ -4,6 +4,7 @@ class BtcApiConst {
   static const String mempoolBaseURL = 'https://mempool.space/testnet/api';
   static const String mempoolTestnet4BaseURL =
       'https://mempool.space/testnet4/api';
+  static const String mempoolSignetBaseURL = 'https://mempool.space/signet/api';
   static const String blockstreamBaseURL =
       'https://blockstream.info/testnet/api';
   static const String blockCypherMainBaseURL =

lib/src/provider/models/config.dart

@@ -106,6 +106,9 @@ class APIConfig {
       case BitcoinNetwork.testnet4:
         baseUrl ??= BtcApiConst.mempoolTestnet4BaseURL;
         break;
+      case BitcoinNetwork.signet:
+        baseUrl ??= BtcApiConst.mempoolSignetBaseURL;
+        break;
       default:
         throw DartBitcoinPluginException(
             'mempool does not support ${network.conf.coinName.name}');