diff --git a/bchain/types_test.go b/bchain/types_test.go
new file mode 100644
index 00000000..f8e10a4f
--- /dev/null
+++ b/bchain/types_test.go
@@ -0,0 +1,107 @@
+package bchain
+
+import (
+	"encoding/hex"
+	"reflect"
+	"testing"
+)
+
+func TestAddressToOutputScript(t *testing.T) {
+	type args struct {
+		address string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    string
+		wantErr bool
+	}{
+		{
+			name:    "P2PKH",
+			args:    args{address: "1JKgN43B9SyLuZH19H5ECvr4KcfrbVHzZ6"},
+			want:    "76a914be027bf3eac907bd4ac8cb9c5293b6f37662722088ac",
+			wantErr: false,
+		},
+		{
+			name:    "P2SH",
+			args:    args{address: "321x69Cb9HZLWwAWGiUBT1U81r1zPLnEjL"},
+			want:    "a9140394b3cf9a44782c10105b93962daa8dba304d7f87",
+			wantErr: false,
+		},
+		{
+			name:    "P2WPKH",
+			args:    args{address: "bc1qrsf2l34jvqnq0lduyz0j5pfu2nkd93nnq0qggn"},
+			want:    "00141c12afc6b2602607fdbc209f2a053c54ecd2c673",
+			wantErr: false,
+		},
+		{
+			name:    "P2WSH",
+			args:    args{address: "bc1qqwtn5s8vjnqdzrm0du885c46ypzt05vakmljhasx28shlv5a355sw5exgr"},
+			want:    "002003973a40ec94c0d10f6f6f0e7a62ba2044b7d19db6ff2bf60651e17fb29d8d29",
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := AddressToOutputScript(tt.args.address)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("AddressToOutputScript() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			h := hex.EncodeToString(got)
+			if !reflect.DeepEqual(h, tt.want) {
+				t.Errorf("AddressToOutputScript() = %v, want %v", h, tt.want)
+			}
+		})
+	}
+}
+
+func TestOutputScriptToAddresses(t *testing.T) {
+	type args struct {
+		script string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    []string
+		wantErr bool
+	}{
+		{
+			name:    "P2PKH",
+			args:    args{script: "76a914be027bf3eac907bd4ac8cb9c5293b6f37662722088ac"},
+			want:    []string{"1JKgN43B9SyLuZH19H5ECvr4KcfrbVHzZ6"},
+			wantErr: false,
+		},
+		{
+			name:    "P2SH",
+			args:    args{script: "a9140394b3cf9a44782c10105b93962daa8dba304d7f87"},
+			want:    []string{"321x69Cb9HZLWwAWGiUBT1U81r1zPLnEjL"},
+			wantErr: false,
+		},
+		{
+			name:    "P2WPKH",
+			args:    args{script: "00141c12afc6b2602607fdbc209f2a053c54ecd2c673"},
+			want:    []string{"bc1qrsf2l34jvqnq0lduyz0j5pfu2nkd93nnq0qggn"},
+			wantErr: false,
+		},
+		{
+			name:    "P2WSH",
+			args:    args{script: "002003973a40ec94c0d10f6f6f0e7a62ba2044b7d19db6ff2bf60651e17fb29d8d29"},
+			want:    []string{"bc1qqwtn5s8vjnqdzrm0du885c46ypzt05vakmljhasx28shlv5a355sw5exgr"},
+			wantErr: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			b, _ := hex.DecodeString(tt.args.script)
+			got, err := OutputScriptToAddresses(b)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("OutputScriptToAddresses() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("OutputScriptToAddresses() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}