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migrate.go
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migrate.go
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package v040
import (
"fmt"
codectypes "github.com/cosmos/cosmos-sdk/codec/types"
v038evidence "github.com/cosmos/cosmos-sdk/x/evidence/legacy/v038"
v040evidence "github.com/cosmos/cosmos-sdk/x/evidence/types"
)
func migrateEvidence(oldEvidence v038evidence.Evidence) *codectypes.Any {
switch oldEvidence := oldEvidence.(type) {
case v038evidence.Equivocation:
{
newEquivocation := &v040evidence.Equivocation{
Height: oldEvidence.Height,
Time: oldEvidence.Time,
Power: oldEvidence.Power,
ConsensusAddress: oldEvidence.ConsensusAddress.String(),
}
any, err := codectypes.NewAnyWithValue(newEquivocation)
if err != nil {
panic(err)
}
return any
}
default:
panic(fmt.Errorf("'%T' is not a valid evidence type", oldEvidence))
}
}
// Migrate accepts exported v0.38 x/evidence genesis state and migrates it to
// v0.40 x/evidence genesis state. The migration includes:
//
// - Removing the `Params` field.
// - Converting Equivocations into Anys.
// - Re-encode in v0.40 GenesisState.
func Migrate(evidenceState v038evidence.GenesisState) *v040evidence.GenesisState {
var newEvidences = make([]*codectypes.Any, len(evidenceState.Evidence))
for i, oldEvidence := range evidenceState.Evidence {
newEvidences[i] = migrateEvidence(oldEvidence)
}
return &v040evidence.GenesisState{
Evidence: newEvidences,
}
}