init w3w

README.md

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+[![Go Reference](https://pkg.go.dev/badge/github.com/rrobrms/w3w.svg)](https://pkg.go.dev/github.com/rrobrms/w3w)
+[![Go Report Card](https://goreportcard.com/badge/github.com/rrobrms/w3w)](https://goreportcard.com/report/github.com/rrobrms/w3w)
+[![Coverage Status](https://coveralls.io/repos/github/rrobrms/w3w/badge.svg?branch=main)](https://coveralls.io/github/rrobrms/w3w?branch=main)
+<!-- [![Latest Release](https://img.shields.io/github/v/release/rrobrms/w3w)](https://github.com/rrobrms/w3w/releases) -->
+
+# Eth wallet CLI
+
+> Simple CLI to generate ether wallets from `go-ethereum`
+
+## Install
+
+> `go get github.com/rrobrms/w3w`
+
+
+## usage
+
+```sh
+$ w3w
+$ 23ed07206ce891e433a0193879caa12b6f50b69qbe374ecrd5fed1c7658a90b6 0xC3c7902A11f79184D5138B047FD9a993633b642d
+```
+
+```sh
+$ w3w -v
+$ ╭─────────────┬──────────────────────────────────────────────────────────────────╮
+$ │ private key │ 23ed07206ce891e433a0193879caa12b6f50b69qbe374ecrd5fed1c7658a90b6 │
+$ ├─────────────├──────────────────────────────────────────────────────────────────┤
+$ │ address     │ 0xC3c7902A11f79184D5138B047FD9a993633b642d                       │
+$ ╰─────────────┴──────────────────────────────────────────────────────────────────╯
+$   valid   https://etherscan.io/address/0xC3c7902A11f79184D5138B047FD9a993633b642d
+```

go.mod

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+module github.com/rrobrms/w3w
+
+go 1.18
+
+require golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d
+
+require (
+	github.com/btcsuite/btcd/btcec/v2 v2.2.0 // indirect
+	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 // indirect
+	github.com/mattn/go-colorable v0.1.9 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+)
+
+require (
+	github.com/ethereum/go-ethereum v1.10.20
+	github.com/fatih/color v1.13.0
+	golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a // indirect
+)

go.sum

@@ -0,0 +1,23 @@
+github.com/btcsuite/btcd/btcec/v2 v2.2.0 h1:fzn1qaOt32TuLjFlkzYSsBC35Q3KUjT1SwPxiMSCF5k=
+github.com/btcsuite/btcd/btcec/v2 v2.2.0/go.mod h1:U7MHm051Al6XmscBQ0BoNydpOTsFAn707034b5nY8zU=
+github.com/decred/dcrd/crypto/blake256 v1.0.0/go.mod h1:sQl2p6Y26YV+ZOcSTP6thNdn47hh8kt6rqSlvmrXFAc=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1 h1:YLtO71vCjJRCBcrPMtQ9nqBsqpA1m5sE92cU+pd5Mcc=
+github.com/decred/dcrd/dcrec/secp256k1/v4 v4.0.1/go.mod h1:hyedUtir6IdtD/7lIxGeCxkaw7y45JueMRL4DIyJDKs=
+github.com/ethereum/go-ethereum v1.10.20 h1:75IW830ClSS40yrQC1ZCMZCt5I+zU16oqId2SiQwdQ4=
+github.com/ethereum/go-ethereum v1.10.20/go.mod h1:LWUN82TCHGpxB3En5HVmLLzPD7YSrEUFmFfN1nKkVN0=
+github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
+github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
+github.com/mattn/go-colorable v0.1.9 h1:sqDoxXbdeALODt0DAeJCVp38ps9ZogZEAXjus69YV3U=
+github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
+github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Kysco4FUpU=
+github.com/mattn/go-isatty v0.0.14 h1:yVuAays6BHfxijgZPzw+3Zlu5yQgKGP2/hcQbHb7S9Y=
+github.com/mattn/go-isatty v0.0.14/go.mod h1:7GGIvUiUoEMVVmxf/4nioHXj79iQHKdU27kJ6hsGG94=
+golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d h1:sK3txAijHtOK88l68nt020reeT1ZdKLIYetKl95FzVY=
+golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1 h1:SrN+KX8Art/Sf4HNj6Zcz06G7VEz+7w9tdXTPOZ7+l4=
+golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20210630005230-0f9fa26af87c/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a h1:dGzPydgVsqGcTRVwiLJ1jVbufYwmzD3LfVPLKsKg+0k=
+golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

main.go

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+package main
+
+import (
+	"crypto/ecdsa"
+	"flag"
+	"fmt"
+	"log"
+	"regexp"
+
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/fatih/color"
+)
+
+func main() {
+
+	privateKey, err := crypto.GenerateKey()
+	if err != nil {
+		log.Fatal(err)
+	}
+	privateKeyBytes := crypto.FromECDSA(privateKey)
+	privateKeyHex := hexutil.Encode(privateKeyBytes)[2:]
+
+	publicKey := privateKey.Public()
+	publicKeyECDSA, ok := publicKey.(*ecdsa.PublicKey)
+	if !ok {
+		log.Fatal("cannot assert type: publicKey is not of type *ecdsa.PublicKey")
+	}
+	address := crypto.PubkeyToAddress(*publicKeyECDSA).Hex()
+
+	re := regexp.MustCompile("^0x[0-9a-fA-F]{40}$")
+	var isValid string
+	if re.MatchString(address) {
+		isValid = color.GreenString("valid")
+	} else {
+		isValid = color.RedString("invalid")
+	}
+
+	t := color.New(color.FgCyan,color.Bold)
+	g := color.New(color.FgHiWhite)
+
+	var (
+		verbose bool = false
+		verbose_usage string = "Get nice output"
+	)
+	flag.BoolVar(&verbose, "v", verbose, verbose_usage)
+    flag.Parse()
+
+	if verbose {
+		t.Println("╭─────────────┬──────────────────────────────────────────────────────────────────╮")
+		t.Printf("│ private key │ %v │\n", privateKeyHex)
+		t.Println("├─────────────├──────────────────────────────────────────────────────────────────┤")
+		t.Printf("│ address     │ %v                       │\n", address)
+		t.Println("╰─────────────┴──────────────────────────────────────────────────────────────────╯")
+		g.Printf("  %s   https://etherscan.io/address/%v \n", isValid, address)	
+	} else {
+		fmt.Println(privateKeyHex, address)
+	}
+}