55 lines
1.0 KiB
Go
55 lines
1.0 KiB
Go
package ens
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import (
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"encoding/hex"
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"fmt"
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"strings"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/crypto"
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)
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func nameHash(name string) common.Hash {
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node := common.Hash{}
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if len(name) > 0 {
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labels := strings.Split(name, ".")
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for i := len(labels) - 1; i >= 0; i-- {
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labelSha := crypto.Keccak256Hash([]byte(labels[i]))
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node = crypto.Keccak256Hash(node.Bytes(), labelSha.Bytes())
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}
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}
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return node
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}
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func validateENSUsername(username string) error {
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if !strings.HasSuffix(username, ".eth") {
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return fmt.Errorf("username must end with .eth")
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}
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return nil
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}
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func usernameToLabel(username string) [32]byte {
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usernameHashed := crypto.Keccak256([]byte(username))
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var label [32]byte
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copy(label[:], usernameHashed)
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return label
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}
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func extractCoordinates(pubkey string) ([32]byte, [32]byte) {
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x, _ := hex.DecodeString(pubkey[4:68])
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y, _ := hex.DecodeString(pubkey[68:132])
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var xByte [32]byte
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copy(xByte[:], x)
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var yByte [32]byte
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copy(yByte[:], y)
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return xByte, yByte
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}
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