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15 lines
283 B

package p2p
import (
"crypto/sha256"
)
// doubleSha256 calculates sha256(sha256(b)) and returns the resulting bytes.
func doubleSha256(b []byte) []byte {
hasher := sha256.New()
hasher.Write(b)
sum := hasher.Sum(nil)
hasher.Reset()
hasher.Write(sum)
return hasher.Sum(nil)
}