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package mock
import (
"context"
"errors"
"fmt"
"strings"
"github.com/tendermint/tendermint/light/provider"
"github.com/tendermint/tendermint/types"
)
type Mock struct {
chainID string
headers map[int64]*types.SignedHeader
vals map[int64]*types.ValidatorSet
evidenceToReport map[string]types.Evidence // hash => evidence
}
var _ provider.Provider = (*Mock)(nil)
// New creates a mock provider with the given set of headers and validator
// sets.
func New(chainID string, headers map[int64]*types.SignedHeader, vals map[int64]*types.ValidatorSet) *Mock {
return &Mock{
chainID: chainID,
headers: headers,
vals: vals,
evidenceToReport: make(map[string]types.Evidence),
}
}
// ChainID returns the blockchain ID.
func (p *Mock) ChainID() string {
return p.chainID
}
func (p *Mock) String() string {
var headers strings.Builder
for _, h := range p.headers {
fmt.Fprintf(&headers, " %d:%X", h.Height, h.Hash())
}
var vals strings.Builder
for _, v := range p.vals {
fmt.Fprintf(&vals, " %X", v.Hash())
}
return fmt.Sprintf("Mock{headers: %s, vals: %v}", headers.String(), vals.String())
}
func (p *Mock) LightBlock(_ context.Context, height int64) (*types.LightBlock, error) {
var lb *types.LightBlock
if height == 0 && len(p.headers) > 0 {
sh := p.headers[int64(len(p.headers))]
vals := p.vals[int64(len(p.vals))]
lb = &types.LightBlock{
SignedHeader: sh,
ValidatorSet: vals,
}
}
if _, ok := p.headers[height]; ok {
sh := p.headers[height]
vals := p.vals[height]
lb = &types.LightBlock{
SignedHeader: sh,
ValidatorSet: vals,
}
}
if lb == nil {
return nil, provider.ErrLightBlockNotFound
}
if lb.SignedHeader == nil || lb.ValidatorSet == nil {
return nil, provider.ErrBadLightBlock{Reason: errors.New("nil header or vals")}
}
if err := lb.ValidateBasic(lb.ChainID); err != nil {
return nil, provider.ErrBadLightBlock{Reason: err}
}
return lb, nil
}
func (p *Mock) ReportEvidence(_ context.Context, ev types.Evidence) error {
p.evidenceToReport[string(ev.Hash())] = ev
return nil
}
func (p *Mock) HasEvidence(ev types.Evidence) bool {
_, ok := p.evidenceToReport[string(ev.Hash())]
return ok
}