184 lines
3.2 KiB
Go
184 lines
3.2 KiB
Go
package types
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import (
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"bytes"
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"context"
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"crypto/sha256"
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"math/big"
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block "github.com/ipfs/go-block-format"
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"github.com/ipfs/go-cid"
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"github.com/multiformats/go-multihash"
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"go.opencensus.io/trace"
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xerrors "golang.org/x/xerrors"
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"github.com/filecoin-project/lotus/chain/address"
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)
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type Ticket struct {
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VRFProof []byte
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}
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type ElectionProof []byte
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type BlockHeader struct {
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Miner address.Address
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Tickets []*Ticket
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ElectionProof []byte
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Parents []cid.Cid
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ParentWeight BigInt
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Height uint64
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ParentStateRoot cid.Cid
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ParentMessageReceipts cid.Cid
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Messages cid.Cid
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BLSAggregate Signature
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Timestamp uint64
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BlockSig Signature
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}
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func (b *BlockHeader) ToStorageBlock() (block.Block, error) {
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data, err := b.Serialize()
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if err != nil {
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return nil, err
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}
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pref := cid.NewPrefixV1(cid.DagCBOR, multihash.BLAKE2B_MIN+31)
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c, err := pref.Sum(data)
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if err != nil {
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return nil, err
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}
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return block.NewBlockWithCid(data, c)
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}
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func (b *BlockHeader) Cid() cid.Cid {
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sb, err := b.ToStorageBlock()
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if err != nil {
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panic(err)
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}
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return sb.Cid()
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}
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func DecodeBlock(b []byte) (*BlockHeader, error) {
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var blk BlockHeader
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if err := blk.UnmarshalCBOR(bytes.NewReader(b)); err != nil {
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return nil, err
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}
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return &blk, nil
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}
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func (blk *BlockHeader) Serialize() ([]byte, error) {
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buf := new(bytes.Buffer)
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if err := blk.MarshalCBOR(buf); err != nil {
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return nil, err
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}
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return buf.Bytes(), nil
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}
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func (blk *BlockHeader) LastTicket() *Ticket {
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return blk.Tickets[len(blk.Tickets)-1]
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}
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func (blk *BlockHeader) SigningBytes() ([]byte, error) {
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blkcopy := *blk
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blkcopy.BlockSig = Signature{}
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return blkcopy.Serialize()
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}
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func (blk *BlockHeader) CheckBlockSignature(ctx context.Context, worker address.Address) error {
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ctx, span := trace.StartSpan(ctx, "checkBlockSignature")
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defer span.End()
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sigb, err := blk.SigningBytes()
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if err != nil {
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return xerrors.Errorf("failed to get block signing bytes: %w", err)
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}
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return blk.BlockSig.Verify(worker, sigb)
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}
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type MsgMeta struct {
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BlsMessages cid.Cid
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SecpkMessages cid.Cid
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}
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func (mm *MsgMeta) Cid() cid.Cid {
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b, err := mm.ToStorageBlock()
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if err != nil {
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panic(err)
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}
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return b.Cid()
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}
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func (mm *MsgMeta) ToStorageBlock() (block.Block, error) {
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buf := new(bytes.Buffer)
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if err := mm.MarshalCBOR(buf); err != nil {
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return nil, xerrors.Errorf("failed to marshal MsgMeta: %w", err)
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}
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pref := cid.NewPrefixV1(cid.DagCBOR, multihash.BLAKE2B_MIN+31)
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c, err := pref.Sum(buf.Bytes())
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if err != nil {
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return nil, err
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}
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return block.NewBlockWithCid(buf.Bytes(), c)
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}
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func CidArrsEqual(a, b []cid.Cid) bool {
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if len(a) != len(b) {
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return false
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}
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// order ignoring compare...
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s := make(map[cid.Cid]bool)
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for _, c := range a {
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s[c] = true
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}
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for _, c := range b {
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if !s[c] {
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return false
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}
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}
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return true
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}
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func PowerCmp(eproof ElectionProof, mpow, totpow BigInt) bool {
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/*
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Need to check that
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h(vrfout) / 2^256 < minerPower / totalPower
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*/
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h := sha256.Sum256(eproof)
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// 2^256
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rden := BigInt{big.NewInt(0).Exp(big.NewInt(2), big.NewInt(256), nil)}
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top := BigMul(rden, mpow)
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out := BigDiv(top, totpow)
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hp := BigFromBytes(h[:])
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return hp.LessThan(out)
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}
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func (t *Ticket) Equals(ot *Ticket) bool {
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return bytes.Equal(t.VRFProof, ot.VRFProof)
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}
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