diff --git a/main_test.go b/main_test.go
new file mode 100644
index 0000000..1eb53cb
--- /dev/null
+++ b/main_test.go
@@ -0,0 +1,109 @@
+package main
+
+import (
+	"strings"
+	"testing"
+
+	sdkmath "cosmossdk.io/math"
+	"github.com/somatic-labs/meteorite/types"
+)
+
+func TestExtractExpectedSequence(t *testing.T) {
+	tests := []struct {
+		name    string
+		errMsg  string
+		want    uint64
+		wantErr bool
+	}{
+		{
+			name:    "valid error message",
+			errMsg:  "account sequence mismatch, expected 42, got 41: incorrect account sequence",
+			want:    42,
+			wantErr: false,
+		},
+		{
+			name:    "missing expected keyword",
+			errMsg:  "account sequence mismatch, sequence 42, got 41",
+			want:    0,
+			wantErr: true,
+		},
+		{
+			name:    "invalid sequence number",
+			errMsg:  "account sequence mismatch, expected abc, got 41",
+			want:    0,
+			wantErr: true,
+		},
+		{
+			name:    "empty error message",
+			errMsg:  "",
+			want:    0,
+			wantErr: true,
+		},
+		{
+			name:    "large sequence number",
+			errMsg:  "account sequence mismatch, expected 18446744073709551615, got 41",
+			want:    18446744073709551615,
+			wantErr: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := extractExpectedSequence(tt.errMsg)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("extractExpectedSequence() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if got != tt.want {
+				t.Errorf("extractExpectedSequence() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestTransferFunds(t *testing.T) {
+	tests := []struct {
+		name          string
+		sender        types.Account
+		receiver      string
+		amount        sdkmath.Int
+		config        types.Config
+		expectedError string
+	}{
+		{
+			name: "signature verification failure",
+			sender: types.Account{
+				PrivKey:  nil, // Mock this with a real private key
+				PubKey:   nil, // Mock this with corresponding public key
+				Address:  "mantra1uqrar205hjv4s8832kwj8e6xhwvk4x0eqml043",
+				Position: 0,
+			},
+			receiver: "mantra1paefpxvjvmmq03gvsfjzwut0zap7z5nq8r99sf",
+			amount:   sdkmath.NewInt(3123890412),
+			config: types.Config{
+				Chain:  "mantra-canary-net-1",
+				Prefix: "mantra",
+				Denom:  "uom",
+				Nodes: types.NodesConfig{
+					RPC:  []string{"http://127.0.0.1:26657"},
+					API:  "http://localhost:1317",
+					GRPC: "localhost:9090",
+				},
+			},
+			expectedError: "signature verification failed",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			err := TransferFunds(tt.sender, tt.receiver, tt.amount, tt.config)
+			if err == nil {
+				t.Error("expected error but got none")
+				return
+			}
+			if !strings.Contains(err.Error(), tt.expectedError) {
+				t.Errorf("expected error containing %q, got %q", tt.expectedError, err.Error())
+			}
+		})
+	}
+}