waku-org/go-waku

package hash

import (
    "crypto/sha256"
    "hash"
    "sync"
)

var sha256Pool = sync.Pool{New: func() interface{} {
    return sha256.New()
}}

// SHA256 generates the SHA256 hash from the input data
func SHA256(data ...[]byte) []byte {
    h, ok := sha256Pool.Get().(hash.Hash)
    if !ok {
        h = sha256.New()
    }
    defer sha256Pool.Put(h)
    h.Reset()
    for i := range data {
        h.Write(data[i])
    }
    return h.Sum(nil)
}