Support payout in Gwei

Pass background and logo through command line

README.md

@@ -25,6 +25,7 @@ The faucet is a web application with the goal of distributing small amounts of E
 ### Installation
 
 1. Clone the repository and navigate to the app’s directory
+
 ```bash
 git clone https://github.com/chainflag/eth-faucet.git
 cd eth-faucet
@@ -35,7 +36,8 @@ cd eth-faucet
 go generate
 ```
 
-3. Build Go project 
+3. Build Go project
+
 ```bash
 go build -o eth-faucet
 ```
@@ -71,6 +73,7 @@ echo "your_keystore_password" > `pwd`/password.txt
 ```
 
 Then run the faucet application without the wallet command-line flags:
+
 ```bash
 ./eth-faucet -httpport 8080
 ```
@@ -83,12 +86,14 @@ The following are the available command-line flags(excluding above wallet flags)
 |-------------------|--------------------------------------------------|---------------|
 | -httpport         | Listener port to serve HTTP connection           | 8080          |
 | -proxycount       | Count of reverse proxies in front of the server  | 0             |
-| -faucet.amount    | Number of Ethers to transfer per user request    | 1.0           |
+| -faucet.amount    | Number of Gwei to transfer per user request      | 1000000000    |
 | -faucet.minutes   | Number of minutes to wait between funding rounds | 1440          |
 | -faucet.name      | Network name to display on the frontend          | testnet       |
 | -faucet.symbol    | Token symbol to display on the frontend          | ETH           |
 | -hcaptcha.sitekey | hCaptcha sitekey                                 |               |
 | -hcaptcha.secret  | hCaptcha secret                                  |               |
+| -frontend.logo    | Logo URL to display on the frontend              | /gatewayfm-logo.svg |
+| -frontend.background | Background to display on the frontend         | /background.jpg |
 
 ### Docker deployment
 

cmd/server.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"math/big"
 	"os"
-	"os/signal"
 	"strings"
 
 	"github.com/ethereum/go-ethereum/crypto"
@@ -24,10 +23,12 @@ var (
 	proxyCntFlag = flag.Int("proxycount", 0, "Count of reverse proxies in front of the server")
 	versionFlag  = flag.Bool("version", false, "Print version number")
 
-	payoutFlag   = flag.Float64("faucet.amount", 1, "Number of Ethers to transfer per user request")
-	intervalFlag = flag.Int("faucet.minutes", 1440, "Number of minutes to wait between funding rounds")
-	netnameFlag  = flag.String("faucet.name", "testnet", "Network name to display on the frontend")
-	symbolFlag   = flag.String("faucet.symbol", "ETH", "Token symbol to display on the frontend")
+	payoutFlag     = flag.Int64("faucet.amount", 1000000000, "Number of Gwei to transfer per user request")
+	intervalFlag   = flag.Int("faucet.minutes", 1440, "Number of minutes to wait between funding rounds")
+	netnameFlag    = flag.String("faucet.name", "testnet", "Network name to display on the frontend")
+	symbolFlag     = flag.String("faucet.symbol", "ETH", "Token symbol to display on the frontend")
+	logoFlag       = flag.String("frontend.logo", "/gatewayfm-logo.svg", "Logo to display on the frontend")
+	backgroundFlag = flag.String("frontend.background", "/background.jpg", "Background to display on the frontend")
 
 	keyJSONFlag  = flag.String("wallet.keyjson", os.Getenv("KEYSTORE"), "Keystore file to fund user requests with")
 	keyPassFlag  = flag.String("wallet.keypass", "password.txt", "Passphrase text file to decrypt keystore")
@@ -60,14 +61,10 @@ func Execute() {
 	if err != nil {
 		panic(fmt.Errorf("cannot connect to web3 provider: %w", err))
 	}
-	config := server.NewConfig(*netnameFlag, *symbolFlag, *httpPortFlag, *intervalFlag, *proxyCntFlag, *payoutFlag, *hcaptchaSiteKeyFlag, *hcaptchaSecretFlag)
+	config := server.NewConfig(*netnameFlag, *symbolFlag, *httpPortFlag, *intervalFlag, *payoutFlag, *proxyCntFlag, *hcaptchaSiteKeyFlag, *hcaptchaSecretFlag, *logoFlag, *backgroundFlag)
 	go server.NewServer(txBuilder, config).Run()
 
-	c := make(chan os.Signal, 1)
-	signal.Notify(c, os.Interrupt)
-	<-c
 }
-
 func getPrivateKeyFromFlags() (*ecdsa.PrivateKey, error) {
 	if *privKeyFlag != "" {
 		hexkey := *privKeyFlag

internal/chain/util.go

@@ -14,6 +14,11 @@ func EtherToWei(amount float64) *big.Int {
 	return wei
 }
 
+func GweiToWei(amount int64) *big.Int {
+	multiplier := new(big.Int).Exp(big.NewInt(10), big.NewInt(9), nil)
+	return new(big.Int).Mul(big.NewInt(amount), multiplier)
+}
+
 func Has0xPrefix(str string) bool {
 	return len(str) >= 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X')
 }

internal/server/config.go

@@ -5,13 +5,15 @@ type Config struct {
 	symbol          string
 	httpPort        int
 	interval        int
-	payout          float64
+	payout          int64
 	proxyCount      int
 	hcaptchaSiteKey string
 	hcaptchaSecret  string
+	logoUrl         string
+	backgroundUrl   string
 }
 
-func NewConfig(network, symbol string, httpPort, interval, proxyCount int, payout float64, hcaptchaSiteKey, hcaptchaSecret string) *Config {
+func NewConfig(network, symbol string, httpPort, interval, proxyCount int, payout int64, hcaptchaSiteKey, hcaptchaSecret, logoUrl, backgroundUrl string) *Config {
 	return &Config{
 		network:         network,
 		symbol:          symbol,
@@ -21,5 +23,7 @@ func NewConfig(network, symbol string, httpPort, interval, proxyCount int, payou
 		proxyCount:      proxyCount,
 		hcaptchaSiteKey: hcaptchaSiteKey,
 		hcaptchaSecret:  hcaptchaSecret,
+		logoUrl:         logoUrl,
+		backgroundUrl:   backgroundUrl,
 	}
 }

internal/server/dto.go

@@ -26,6 +26,8 @@ type infoResponse struct {
 	Payout          string `json:"payout"`
 	Symbol          string `json:"symbol"`
 	HcaptchaSiteKey string `json:"hcaptcha_sitekey,omitempty"`
+	LogoUrl         string `json:"logo_url"`
+	BackgroundUrl   string `json:"background_url"`
 }
 
 type malformedRequest struct {

internal/server/server.go

@@ -55,7 +55,7 @@ func (s *Server) handleClaim() http.HandlerFunc {
 		address, _ := readAddress(r)
 		ctx, cancel := context.WithTimeout(r.Context(), 5*time.Second)
 		defer cancel()
-		txHash, err := s.Transfer(ctx, address, chain.EtherToWei(s.cfg.payout))
+		txHash, err := s.Transfer(ctx, address, chain.GweiToWei(s.cfg.payout))
 		if err != nil {
 			log.WithError(err).Error("Failed to send transaction")
 			renderJSON(w, claimResponse{Message: err.Error()}, http.StatusInternalServerError)
@@ -81,8 +81,10 @@ func (s *Server) handleInfo() http.HandlerFunc {
 			Account:         s.Sender().String(),
 			Network:         s.cfg.network,
 			Symbol:          s.cfg.symbol,
-			Payout:          strconv.FormatFloat(s.cfg.payout, 'f', -1, 64),
+			Payout:          strconv.FormatInt(s.cfg.payout, 10),
 			HcaptchaSiteKey: s.cfg.hcaptchaSiteKey,
+			LogoUrl:         s.cfg.logoUrl,
+			BackgroundUrl:   s.cfg.backgroundUrl,
 		}, http.StatusOK)
 	}
 }

web/.env.example

@@ -1,9 +1,5 @@
-# BRANDING 
+# BRANDING
 
 VITE_FAVICON_PATH=/favicon.png
 VITE_LOGO_PATH=/gpt-logo-white-transparent.svg
 VITE_BACKGROUND_PATH=/gpt-background.jpg
-
-# OTHER
-
-VITE_SYMBOL=ETH

web/src/Faucet.svelte

@@ -4,22 +4,48 @@
   import { CloudflareProvider } from '@ethersproject/providers';
   import { setDefaults as setToast, toast } from 'bulma-toast';
 
-	const symbol = import.meta.env.VITE_SYMBOL
-
   let input = null;
   let faucetInfo = {
     account: '0x0000000000000000000000000000000000000000',
     network: 'testnet',
-    payout: 1,
-    symbol: symbol,
+    payout: 1000000000,
+    symbol: 'ETH',
     hcaptcha_sitekey: '',
+    logo_url: '/gatewayfm-logo.svg',
+    background_url: 'background.jpg'
   };
 
   let mounted = false;
   let hcaptchaLoaded = false;
 
-	const logoPath = import.meta.env.VITE_LOGO_PATH
-	const backgroundPath = import.meta.env.VITE_BACKGROUND_PATH
+  function gweiToEth(gwei) {
+      let str = gwei.toString();
+      let len = str.length;
+
+      // Add leading zeros if necessary
+      if (len <= 9) {
+          str = '0'.repeat(9 - len) + str;
+          len = str.length;
+      }
+
+      // Insert decimal point
+      str = str.slice(0, len - 9) + '.' + str.slice(len - 9);
+
+      // Add leading zero if necessary
+      if (str.startsWith('.')) {
+          str = '0' + str;
+      }
+
+      // Remove trailing zeros
+      str = str.replace(/0+$/, '');
+
+      // Remove trailing decimal point
+      if (str.endsWith('.')) {
+          str = str.slice(0, -1);
+      }
+
+      return str;
+  }
 
   onMount(async () => {
     const res = await fetch('/api/info');
@@ -123,14 +149,14 @@
 </svelte:head>
 
 <main>
-  <section class="hero is-info is-fullheight" style='background-image: url({backgroundPath})'>
+  <section class="hero is-info is-fullheight" style='background-image: url({faucetInfo.background_url})'>
     <div class="hero-head">
       <nav class="navbar">
         <div class="container">
           <div class="navbar-brand">
             <a class="navbar-item" href="../..">
               <span class="icon icon-brand">
-                <img src={logoPath} alt="logo"/>
+                <img src={faucetInfo.logo_url} alt="logo"/>
               </span>
               <span><b>{faucetInfo.symbol} Faucet</b></span>
             </a>
@@ -158,7 +184,7 @@
       <div class="container has-text-centered">
         <div class="column is-6 is-offset-3">
           <h1 class="title">
-            Receive {faucetInfo.payout}
+            Receive {gweiToEth(faucetInfo.payout)}
             {faucetInfo.symbol} per request
           </h1>
           <h2 class="subtitle">
@@ -194,7 +220,7 @@
 <style>
 
 	.icon-brand {
-		width: 5rem; 
+		width: 5rem;
 		margin: 1rem;
 	}