feat(gateway): add F3GetCertificate & F3GetLatestCertificate to gateway (#12778)

Author: rvagg

CHANGELOG.md

@@ -49,6 +49,7 @@ For certain node operators, such as full archival nodes or systems that need to
 - Fix checkpointed tipsets being expanded ([filecoin-project/lotus#12747](https://github.com/filecoin-project/lotus/pull/12747))
 - Remove IPNI advertisement relay over pubsub via Lotus node as it now has been deprecated. ([filecoin-project/lotus#12768](https://github.com/filecoin-project/lotus/pull/12768)
 - During a network upgrade, log migration progress every 2 seconds so they are more helpful and informative. The `LOTUS_MIGRATE_PROGRESS_LOG_SECONDS` environment variable can be used to change this if needed. ([filecoin-project/lotus#12732](https://github.com/filecoin-project/lotus/pull/12732))
+- Add F3GetCertificate & F3GetLatestCertificate to the gateway. ([filecoin-project/lotus#12778](https://github.com/filecoin-project/lotus/pull/12778))
 
 ## Bug Fixes
 

api/api_gateway.go

@@ -7,6 +7,7 @@ import (
 	"github.com/ipfs/go-cid"
 
 	"github.com/filecoin-project/go-address"
+	"github.com/filecoin-project/go-f3/certs"
 	"github.com/filecoin-project/go-jsonrpc"
 	"github.com/filecoin-project/go-state-types/abi"
 	verifregtypes "github.com/filecoin-project/go-state-types/builtin/v9/verifreg"
@@ -141,4 +142,7 @@ type Gateway interface {
 	GetActorEventsRaw(ctx context.Context, filter *types.ActorEventFilter) ([]*types.ActorEvent, error)
 	SubscribeActorEventsRaw(ctx context.Context, filter *types.ActorEventFilter) (<-chan *types.ActorEvent, error)
 	ChainGetEvents(context.Context, cid.Cid) ([]types.Event, error)
+
+	F3GetCertificate(ctx context.Context, instance uint64) (*certs.FinalityCertificate, error)
+	F3GetLatestCertificate(ctx context.Context) (*certs.FinalityCertificate, error)
 }