Implement rewards

blockchain.go

@@ -270,6 +270,10 @@ func (bc *Blockchain) SignTransaction(tx *Transaction, privKey ecdsa.PrivateKey)
 
 // VerifyTransaction verifies transaction input signatures
 func (bc *Blockchain) VerifyTransaction(tx *Transaction) bool {
+	if tx.IsCoinbase() {
+		return true
+	}
+
 	prevTXs := make(map[string]Transaction)
 
 	for _, vin := range tx.Vin {

cli_send.go

@@ -17,6 +17,9 @@ func (cli *CLI) send(from, to string, amount int) {
 	defer bc.db.Close()
 
 	tx := NewUTXOTransaction(from, to, amount, bc)
-	bc.MineBlock([]*Transaction{tx})
+	cbTx := NewCoinbaseTX(from, "")
+	txs := []*Transaction{cbTx, tx}
+
+	bc.MineBlock(txs)
 	fmt.Println("Success!")
 }