Function calcEncodeKey

ethstorage/data_shard.go:234–245

Obtain a unique encoding key with keccak256(chunkIdx || commit || miner). This will make sure the encoded data will be unique in terms of idx, storage provider, and data

(commit common.Hash, chunkIdx uint64, miner common.Address)

// Obtain a unique encoding key with keccak256(chunkIdx || commit || miner).
// This will make sure the encoded data will be unique in terms of idx, storage provider, and data
func calcEncodeKey(commit common.Hash, chunkIdx uint64, miner common.Address) common.Hash {
	// keep the datahash and remove all the other metas
	c := common.Hash{}
	copy(c[0:HashSizeInContract], commit[0:HashSizeInContract])

	bb := make([]byte, 0)
	bb = append(bb, c.Bytes()...)
	bb = append(bb, common.BytesToHash(miner.Bytes()).Bytes()...)
	bb = append(bb, common.BigToHash(big.NewInt(int64(chunkIdx))).Bytes()...)

	return crypto.Keccak256Hash(bb)
}

// EncodeChunk encodes bs and returned a chunk-sized encoded one
func EncodeChunk(chunkSize uint64, bs []byte, encodeType uint64, encodeKey common.Hash) []byte {