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miner-info.go
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/
miner-info.go
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package splitcarfetcher
import (
"context"
"encoding/base64"
"fmt"
"time"
"github.com/filecoin-project/go-address"
"github.com/jellydator/ttlcache/v3"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/multiformats/go-multiaddr"
"github.com/ybbus/jsonrpc/v3"
)
type MinerInfoCache struct {
lotusClient jsonrpc.RPCClient
requestTimeout time.Duration
minerInfoCache *ttlcache.Cache[string, *MinerInfo]
}
type MinerInfo struct {
PeerIDEncoded string `json:"PeerID"`
PeerID peer.ID
MultiaddrsBase64Encoded []string `json:"Multiaddrs"`
Multiaddrs []multiaddr.Multiaddr
}
func NewMinerInfo(
lotusClient jsonrpc.RPCClient,
cacheTTL time.Duration,
requestTimeout time.Duration,
) *MinerInfoCache {
minerInfoCache := ttlcache.New[string, *MinerInfo](
ttlcache.WithTTL[string, *MinerInfo](cacheTTL),
ttlcache.WithDisableTouchOnHit[string, *MinerInfo]())
return &MinerInfoCache{
lotusClient: lotusClient,
requestTimeout: requestTimeout,
minerInfoCache: minerInfoCache,
}
}
func (d *MinerInfoCache) GetProviderInfo(ctx context.Context, provider address.Address) (*MinerInfo, error) {
file := d.minerInfoCache.Get(provider.String())
if file != nil && !file.IsExpired() {
return file.Value(), nil
}
minerInfo, err := (&MinerInfoFetcher{Client: d.lotusClient}).GetProviderInfo(ctx, provider.String())
if err != nil {
return nil, err
}
d.minerInfoCache.Set(provider.String(), minerInfo, ttlcache.DefaultTTL)
return minerInfo, nil
}
type MinerInfoFetcher struct {
Client jsonrpc.RPCClient
}
func (m *MinerInfoFetcher) GetProviderInfo(ctx context.Context, provider string) (*MinerInfo, error) {
minerInfo := new(MinerInfo)
err := m.Client.CallFor(ctx, minerInfo, "Filecoin.StateMinerInfo", provider, nil)
if err != nil {
return nil, fmt.Errorf("failed to get miner info for %s: %w", provider, err)
}
minerInfo.Multiaddrs = make([]multiaddr.Multiaddr, len(minerInfo.MultiaddrsBase64Encoded))
for i, addr := range minerInfo.MultiaddrsBase64Encoded {
decoded, err := base64.StdEncoding.DecodeString(addr)
if err != nil {
return nil, fmt.Errorf("failed to decode multiaddr %s: %w", addr, err)
}
minerInfo.Multiaddrs[i], err = multiaddr.NewMultiaddrBytes(decoded)
if err != nil {
return nil, fmt.Errorf("failed to parse multiaddr %s: %w", addr, err)
}
}
minerInfo.PeerID, err = peer.Decode(minerInfo.PeerIDEncoded)
if err != nil {
return nil, fmt.Errorf("failed to decode peer id %s: %w", minerInfo.PeerIDEncoded, err)
}
return minerInfo, nil
}