add wegwit & taproot keys

proto/bitcoin/keys/taproot/keys.proto

@@ -0,0 +1,33 @@
+syntax = "proto3";
+package bitcoin.keys.taproot;
+
+import "amino/amino.proto";
+import "gogoproto/gogo.proto";
+
+option go_package = "github.com/sideprotocol/side/bitcoin/keys/taproot";
+
+message PubKey {
+  option (amino.name) = "bitcoin/PubKeyTaproot";
+  // The Amino encoding is simply the inner bytes field, and not the Amino
+  // encoding of the whole PubKey struct.
+  //
+  // Example (JSON):
+  // s := PubKey{Key: []byte{0x01}}
+  // out := AminoJSONEncoder(s)
+  //
+  // Then we have:
+  // out == `"MQ=="`
+  // out != `{"key":"MQ=="}`
+  option (amino.message_encoding)     = "key_field";
+  option (gogoproto.goproto_stringer) = false;
+
+  bytes key = 1;
+}
+
+// PrivKey defines a Taproot private key.
+message PrivKey {
+  option (amino.name)             = "bitcoin/PrivKeyTaproot";
+  option (amino.message_encoding) = "key_field";
+
+  bytes key = 1;
+}

proto/bitcoin/keys/wegwit/keys.proto

@@ -0,0 +1,33 @@
+syntax = "proto3";
+package bitcoin.segwit;
+
+import "amino/amino.proto";
+import "gogoproto/gogo.proto";
+
+option go_package = "github.com/sideprotocol/side/bitcoin/keys/segwit";
+
+message PubKey {
+  option (amino.name) = "bitcoin/PubKeySegWit";
+  // The Amino encoding is simply the inner bytes field, and not the Amino
+  // encoding of the whole PubKey struct.
+  //
+  // Example (JSON):
+  // s := PubKey{Key: []byte{0x01}}
+  // out := AminoJSONEncoder(s)
+  //
+  // Then we have:
+  // out == `"MQ=="`
+  // out != `{"key":"MQ=="}`
+  option (amino.message_encoding)     = "key_field";
+  option (gogoproto.goproto_stringer) = false;
+
+  bytes key = 1;
+}
+
+// PrivKey defines a SegWit private key.
+message PrivKey {
+  option (amino.name)             = "bitcoin/PrivKeySegWit";
+  option (amino.message_encoding) = "key_field";
+
+  bytes key = 1;
+}