status-im/status-go

package alias

import (
    "crypto/ecdsa"
    "encoding/hex"
    "fmt"

    "github.com/status-im/status-go/eth-node/crypto"
)

const poly uint64 = 0xB8

func generate(seed uint64) string {
    generator := newLSFR(poly, seed)
    adjective1Index := generator.next() % uint64(len(adjectives))
    adjective2Index := generator.next() % uint64(len(adjectives))
    animalIndex := generator.next() % uint64(len(animals))
    adjective1 := adjectives[adjective1Index]
    adjective2 := adjectives[adjective2Index]
    animal := animals[animalIndex]

    return fmt.Sprintf("%s %s %s", adjective1, adjective2, animal)
}

// GenerateFromPublicKey returns the 3 words name given an *ecdsa.PublicKey
func GenerateFromPublicKey(publicKey *ecdsa.PublicKey) string {
    // Here we truncate the public key to the least significant 64 bits
    return generate(uint64(publicKey.X.Int64()))
}

// GenerateFromPublicKeyString returns the 3 words name given a public key
// prefixed with 0x
func GenerateFromPublicKeyString(publicKeyString string) (string, error) {
    publicKeyBytes, err := hex.DecodeString(publicKeyString[2:])
    if err != nil {
        return "", err
    }

    publicKey, err := crypto.UnmarshalPubkey(publicKeyBytes)
    if err != nil {
        return "", err
    }

    return GenerateFromPublicKey(publicKey), nil
}