github.com/project-88388/tendermint-v0.34.14-terra.2@v1.0.0/crypto/merkle/hash.go (about)

     1  package merkle
     2  
     3  import (
     4  	"github.com/tendermint/tendermint/crypto/tmhash"
     5  )
     6  
     7  // TODO: make these have a large predefined capacity
     8  var (
     9  	leafPrefix  = []byte{0}
    10  	innerPrefix = []byte{1}
    11  )
    12  
    13  // returns tmhash(<empty>)
    14  func emptyHash() []byte {
    15  	return tmhash.Sum([]byte{})
    16  }
    17  
    18  // returns tmhash(0x00 || leaf)
    19  func leafHash(leaf []byte) []byte {
    20  	return tmhash.Sum(append(leafPrefix, leaf...))
    21  }
    22  
    23  // returns tmhash(0x01 || left || right)
    24  func innerHash(left []byte, right []byte) []byte {
    25  	return tmhash.Sum(append(innerPrefix, append(left, right...)...))
    26  }