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74 lines
2.0 KiB
74 lines
2.0 KiB
package identitychain
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import (
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"bytes"
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"crypto/sha256"
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"encoding/gob"
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"log"
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"time"
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"github.com/simple-rules/harmony-benchmark/node"
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"github.com/simple-rules/harmony-benchmark/utils"
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)
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// IdentityBlock has the information of one node
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type IdentityBlock struct {
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Timestamp int64
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PrevBlockHash [32]byte
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NumIdentities int32
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Identities []*node.Node
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}
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// Serialize serializes the block
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func (b *IdentityBlock) Serialize() []byte {
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var result bytes.Buffer
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encoder := gob.NewEncoder(&result)
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err := encoder.Encode(b)
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if err != nil {
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log.Panic(err)
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}
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return result.Bytes()
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}
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//Get Identities
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func (b *IdentityBlock) GetIdentities() []*node.Node {
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return b.Identities
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}
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// DeserializeBlock deserializes a block
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func DeserializeBlock(d []byte) *IdentityBlock {
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var block IdentityBlock
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decoder := gob.NewDecoder(bytes.NewReader(d))
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err := decoder.Decode(&block)
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if err != nil {
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log.Panic(err)
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}
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return &block
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}
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// NewBlock creates and returns a new block.
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func NewBlock(Identities []*node.Node, prevBlockHash [32]byte) *IdentityBlock {
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block := &IdentityBlock{Timestamp: time.Now().Unix(), PrevBlockHash: prevBlockHash, NumIdentities: int32(len(Identities)), Identities: Identities}
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return block
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}
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// CalculateBlockHash returns a hash of the block
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func (b *IdentityBlock) CalculateBlockHash() [32]byte {
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var hashes [][]byte
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var blockHash [32]byte
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hashes = append(hashes, utils.ConvertFixedDataIntoByteArray(b.Timestamp))
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hashes = append(hashes, b.PrevBlockHash[:])
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for _, id := range b.Identities {
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hashes = append(hashes, utils.ConvertFixedDataIntoByteArray(id))
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}
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hashes = append(hashes, utils.ConvertFixedDataIntoByteArray(b.NumIdentities))
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blockHash = sha256.Sum256(bytes.Join(hashes, []byte{}))
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return blockHash
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}
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// NewGenesisBlock creates and returns genesis Block.
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func NewGenesisBlock() *IdentityBlock {
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var Ids []*node.Node
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block := &IdentityBlock{Timestamp: time.Now().Unix(), PrevBlockHash: [32]byte{}, NumIdentities: 1, Identities: Ids}
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return block
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}
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