60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package transport
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import (
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"crypto/ecdsa"
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"encoding/hex"
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"math/big"
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"strconv"
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"github.com/status-im/status-go/eth-node/crypto"
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"github.com/status-im/status-go/eth-node/types"
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)
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const discoveryTopic = "contact-discovery"
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var (
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// The number of partitions.
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nPartitions = big.NewInt(5000)
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)
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// ToTopic converts a string to a whisper topic.
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func ToTopic(s string) []byte {
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return crypto.Keccak256([]byte(s))[:types.TopicLength]
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}
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func StrToPublicKey(str string) (*ecdsa.PublicKey, error) {
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publicKeyBytes, err := hex.DecodeString(str)
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if err != nil {
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return nil, err
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}
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return crypto.UnmarshalPubkey(publicKeyBytes)
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}
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func PublicKeyToStr(publicKey *ecdsa.PublicKey) string {
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return hex.EncodeToString(crypto.FromECDSAPub(publicKey))
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}
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func PersonalDiscoveryTopic(publicKey *ecdsa.PublicKey) string {
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return "contact-discovery-" + PublicKeyToStr(publicKey)
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}
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// PartitionedTopic returns the associated partitioned topic string
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// with the given public key.
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func PartitionedTopic(publicKey *ecdsa.PublicKey) string {
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partition := big.NewInt(0)
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partition.Mod(publicKey.X, nPartitions)
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return "contact-discovery-" + strconv.FormatInt(partition.Int64(), 10)
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}
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func ContactCodeTopic(publicKey *ecdsa.PublicKey) string {
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return "0x" + PublicKeyToStr(publicKey) + "-contact-code"
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}
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func NegotiatedTopic(publicKey *ecdsa.PublicKey) string {
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return "0x" + PublicKeyToStr(publicKey) + "-negotiated"
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}
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func DiscoveryTopic() string {
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return discoveryTopic
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}
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