mirror of
https://github.com/tendermint/tendermint.git
synced 2026-08-19 13:46:17 +00:00
Callum WatersandGitHub
f368b91caf
## Description I'm just doing a self audit of the light client. There's a few things I've changed - Validate trust level in `VerifyNonAdjacent` function - Make errNoWitnesses public (it's something people running software on top of a light client should be able to parse) - Remove `ChainID` check of witnesses on start up. We do this already when we compare the first header with witnesses - Remove `ChainID()` from provider interface Closes: #4538
87 lines
2.1 KiB
Go
87 lines
2.1 KiB
Go
package mock
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import (
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"context"
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"errors"
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"fmt"
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"strings"
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"github.com/tendermint/tendermint/light/provider"
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"github.com/tendermint/tendermint/types"
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)
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type Mock struct {
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id string
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headers map[int64]*types.SignedHeader
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vals map[int64]*types.ValidatorSet
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evidenceToReport map[string]types.Evidence // hash => evidence
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}
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var _ provider.Provider = (*Mock)(nil)
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// New creates a mock provider with the given set of headers and validator
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// sets.
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func New(id string, headers map[int64]*types.SignedHeader, vals map[int64]*types.ValidatorSet) *Mock {
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return &Mock{
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id: id,
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headers: headers,
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vals: vals,
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evidenceToReport: make(map[string]types.Evidence),
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}
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}
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func (p *Mock) String() string {
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var headers strings.Builder
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for _, h := range p.headers {
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fmt.Fprintf(&headers, " %d:%X", h.Height, h.Hash())
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}
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var vals strings.Builder
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for _, v := range p.vals {
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fmt.Fprintf(&vals, " %X", v.Hash())
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}
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return fmt.Sprintf("Mock{id: %s, headers: %s, vals: %v}", p.id, headers.String(), vals.String())
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}
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func (p *Mock) LightBlock(_ context.Context, height int64) (*types.LightBlock, error) {
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var lb *types.LightBlock
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if height == 0 && len(p.headers) > 0 {
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sh := p.headers[int64(len(p.headers))]
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vals := p.vals[int64(len(p.vals))]
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lb = &types.LightBlock{
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SignedHeader: sh,
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ValidatorSet: vals,
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}
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}
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if _, ok := p.headers[height]; ok {
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sh := p.headers[height]
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vals := p.vals[height]
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lb = &types.LightBlock{
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SignedHeader: sh,
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ValidatorSet: vals,
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}
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}
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if lb == nil {
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return nil, provider.ErrLightBlockNotFound
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}
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if lb.SignedHeader == nil || lb.ValidatorSet == nil {
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return nil, provider.ErrBadLightBlock{Reason: errors.New("nil header or vals")}
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}
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if err := lb.ValidateBasic(lb.ChainID); err != nil {
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return nil, provider.ErrBadLightBlock{Reason: err}
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}
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return lb, nil
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}
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func (p *Mock) ReportEvidence(_ context.Context, ev types.Evidence) error {
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p.evidenceToReport[string(ev.Hash())] = ev
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return nil
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}
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func (p *Mock) HasEvidence(ev types.Evidence) bool {
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_, ok := p.evidenceToReport[string(ev.Hash())]
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return ok
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}
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