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light: implement light block (#5298)

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This commit is contained in:
Callum Waters
2020-09-01 17:45:55 +02:00
committed by GitHub
parent b6a5f7b126
commit 2b58a62721
25 changed files with 1343 additions and 1196 deletions
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46
light/rpc/client.go
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@@ -95,7 +95,7 @@ func (c *Client) ABCIQueryWithOptions(path string, data tmbytes.HexBytes,
// Update the light client if we're behind.
// NOTE: AppHash for height H is in header H+1.
h, err := c.updateLightClientIfNeededTo(resp.Height + 1)
l, err := c.updateLightClientIfNeededTo(resp.Height + 1)
if err != nil {
return nil, err
}
@@ -111,7 +111,7 @@ func (c *Client) ABCIQueryWithOptions(path string, data tmbytes.HexBytes,
kp := merkle.KeyPath{}
kp = kp.AppendKey([]byte(storeName), merkle.KeyEncodingURL)
kp = kp.AppendKey(resp.Key, merkle.KeyEncodingURL)
err = c.prt.VerifyValue(resp.ProofOps, h.AppHash, kp.String(), resp.Value)
err = c.prt.VerifyValue(resp.ProofOps, l.AppHash, kp.String(), resp.Value)
if err != nil {
return nil, fmt.Errorf("verify value proof: %w", err)
}
@@ -120,7 +120,7 @@ func (c *Client) ABCIQueryWithOptions(path string, data tmbytes.HexBytes,
// OR validate the ansence proof against the trusted header.
// XXX How do we encode the key into a string...
err = c.prt.VerifyAbsence(resp.ProofOps, h.AppHash, string(resp.Key))
err = c.prt.VerifyAbsence(resp.ProofOps, l.AppHash, string(resp.Key))
if err != nil {
return nil, fmt.Errorf("verify absence proof: %w", err)
}
@@ -178,13 +178,13 @@ func (c *Client) ConsensusParams(height *int64) (*ctypes.ResultConsensusParams,
}
// Update the light client if we're behind.
h, err := c.updateLightClientIfNeededTo(res.BlockHeight)
l, err := c.updateLightClientIfNeededTo(res.BlockHeight)
if err != nil {
return nil, err
}
// Verify hash.
if cH, tH := types.HashConsensusParams(res.ConsensusParams), h.ConsensusHash; !bytes.Equal(cH, tH) {
if cH, tH := types.HashConsensusParams(res.ConsensusParams), l.ConsensusHash; !bytes.Equal(cH, tH) {
return nil, fmt.Errorf("params hash %X does not match trusted hash %X",
cH, tH)
}
@@ -224,7 +224,7 @@ func (c *Client) BlockchainInfo(minHeight, maxHeight int64) (*ctypes.ResultBlock
// Verify each of the BlockMetas.
for _, meta := range res.BlockMetas {
h, err := c.lc.TrustedHeader(meta.Header.Height)
h, err := c.lc.TrustedLightBlock(meta.Header.Height)
if err != nil {
return nil, fmt.Errorf("trusted header %d: %w", meta.Header.Height, err)
}
@@ -261,13 +261,13 @@ func (c *Client) Block(height *int64) (*ctypes.ResultBlock, error) {
}
// Update the light client if we're behind.
h, err := c.updateLightClientIfNeededTo(res.Block.Height)
l, err := c.updateLightClientIfNeededTo(res.Block.Height)
if err != nil {
return nil, err
}
// Verify block.
if bH, tH := res.Block.Hash(), h.Hash(); !bytes.Equal(bH, tH) {
if bH, tH := res.Block.Hash(), l.Hash(); !bytes.Equal(bH, tH) {
return nil, fmt.Errorf("block header %X does not match with trusted header %X",
bH, tH)
}
@@ -295,13 +295,13 @@ func (c *Client) BlockByHash(hash []byte) (*ctypes.ResultBlock, error) {
}
// Update the light client if we're behind.
h, err := c.updateLightClientIfNeededTo(res.Block.Height)
l, err := c.updateLightClientIfNeededTo(res.Block.Height)
if err != nil {
return nil, err
}
// Verify block.
if bH, tH := res.Block.Hash(), h.Hash(); !bytes.Equal(bH, tH) {
if bH, tH := res.Block.Hash(), l.Hash(); !bytes.Equal(bH, tH) {
return nil, fmt.Errorf("block header %X does not match with trusted header %X",
bH, tH)
}
@@ -336,7 +336,7 @@ func (c *Client) BlockResults(height *int64) (*ctypes.ResultBlockResults, error)
}
// Update the light client if we're behind.
trustedHeader, err := c.updateLightClientIfNeededTo(h + 1)
trustedBlock, err := c.updateLightClientIfNeededTo(h + 1)
if err != nil {
return nil, err
}
@@ -364,9 +364,9 @@ func (c *Client) BlockResults(height *int64) (*ctypes.ResultBlockResults, error)
rH := merkle.HashFromByteSlices([][]byte{bbeBytes, results.Hash(), ebeBytes})
// Verify block results.
if !bytes.Equal(rH, trustedHeader.LastResultsHash) {
if !bytes.Equal(rH, trustedBlock.LastResultsHash) {
return nil, fmt.Errorf("last results %X does not match with trusted last results %X",
rH, trustedHeader.LastResultsHash)
rH, trustedBlock.LastResultsHash)
}
return res, nil
@@ -387,13 +387,13 @@ func (c *Client) Commit(height *int64) (*ctypes.ResultCommit, error) {
}
// Update the light client if we're behind.
h, err := c.updateLightClientIfNeededTo(res.Height)
l, err := c.updateLightClientIfNeededTo(res.Height)
if err != nil {
return nil, err
}
// Verify commit.
if rH, tH := res.Hash(), h.Hash(); !bytes.Equal(rH, tH) {
if rH, tH := res.Hash(), l.Hash(); !bytes.Equal(rH, tH) {
return nil, fmt.Errorf("header %X does not match with trusted header %X",
rH, tH)
}
@@ -415,13 +415,13 @@ func (c *Client) Tx(hash []byte, prove bool) (*ctypes.ResultTx, error) {
}
// Update the light client if we're behind.
h, err := c.updateLightClientIfNeededTo(res.Height)
l, err := c.updateLightClientIfNeededTo(res.Height)
if err != nil {
return nil, err
}
// Validate the proof.
return res, res.Proof.Validate(h.DataHash)
return res, res.Proof.Validate(l.DataHash)
}
func (c *Client) TxSearch(query string, prove bool, page, perPage *int, orderBy string) (
@@ -452,7 +452,7 @@ func (c *Client) Validators(height *int64, page, perPage *int) (*ctypes.ResultVa
}
// Update the light client if we're behind.
h, err := c.updateLightClientIfNeededTo(updateHeight)
l, err := c.updateLightClientIfNeededTo(updateHeight)
if err != nil {
return nil, err
}
@@ -462,9 +462,9 @@ func (c *Client) Validators(height *int64, page, perPage *int) (*ctypes.ResultVa
case 1:
// if it's the first block we need to validate with the current validator hash as opposed to the
// next validator hash
tH = h.ValidatorsHash
tH = l.ValidatorsHash
default:
tH = h.NextValidatorsHash
tH = l.NextValidatorsHash
}
// Verify validators.
@@ -495,12 +495,12 @@ func (c *Client) UnsubscribeAll(ctx context.Context, subscriber string) error {
return c.next.UnsubscribeAll(ctx, subscriber)
}
func (c *Client) updateLightClientIfNeededTo(height int64) (*types.SignedHeader, error) {
h, err := c.lc.VerifyHeaderAtHeight(height, time.Now())
func (c *Client) updateLightClientIfNeededTo(height int64) (*types.LightBlock, error) {
l, err := c.lc.VerifyLightBlockAtHeight(height, time.Now())
if err != nil {
return nil, fmt.Errorf("failed to update light client to %d: %w", height, err)
}
return h, nil
return l, nil
}
func (c *Client) RegisterOpDecoder(typ string, dec merkle.OpDecoder) {