cmd/faucet: add sepolia network support (ethereum#25128)

cmd/faucet: Add Sepolia network support to faucet

cmd/faucet/README.md

@@ -10,9 +10,10 @@ The `faucet` is a single binary app (everything included) with all configuration
 
 First thing's first, the `faucet` needs to connect to an Ethereum network, for which it needs the necessary genesis and network infos. Each of the following flags must be set:
 
-- `-genesis` is a path to a file containin the network `genesis.json`. or using:
+- `-genesis` is a path to a file containing the network `genesis.json`. or using:
   - `-goerli` with the faucet with Görli network config
   - `-rinkeby` with the faucet with Rinkeby network config
+  - `-sepolia` with the faucet with Sepolia network config
 - `-network` is the devp2p network id used during connection
 - `-bootnodes` is a list of `enode://` ids to join the network through
 

cmd/faucet/faucet.go

@@ -86,6 +86,7 @@ var (
 
 	goerliFlag  = flag.Bool("goerli", false, "Initializes the faucet with Görli network config")
 	rinkebyFlag = flag.Bool("rinkeby", false, "Initializes the faucet with Rinkeby network config")
+	sepoliaFlag = flag.Bool("sepolia", false, "Initializes the faucet with Sepolia network config")
 )
 
 var (
@@ -143,7 +144,7 @@ func main() {
 		log.Crit("Failed to render the faucet template", "err", err)
 	}
 	// Load and parse the genesis block requested by the user
-	genesis, err := getGenesis(*genesisFlag, *goerliFlag, *rinkebyFlag)
+	genesis, err := getGenesis(*genesisFlag, *goerliFlag, *rinkebyFlag, *sepoliaFlag)
 	if err != nil {
 		log.Crit("Failed to parse genesis config", "err", err)
 	}
@@ -882,7 +883,7 @@ func authNoAuth(url string) (string, string, common.Address, error) {
 }
 
 // getGenesis returns a genesis based on input args
-func getGenesis(genesisFlag string, goerliFlag bool, rinkebyFlag bool) (*core.Genesis, error) {
+func getGenesis(genesisFlag string, goerliFlag bool, rinkebyFlag bool, sepoliaFlag bool) (*core.Genesis, error) {
 	switch {
 	case genesisFlag != "":
 		var genesis core.Genesis
@@ -892,6 +893,8 @@ func getGenesis(genesisFlag string, goerliFlag bool, rinkebyFlag bool) (*core.Ge
 		return core.DefaultGoerliGenesisBlock(), nil
 	case rinkebyFlag:
 		return core.DefaultRinkebyGenesisBlock(), nil
+	case sepoliaFlag:
+		return core.DefaultSepoliaGenesisBlock(), nil
 	default:
 		return nil, fmt.Errorf("no genesis flag provided")
 	}