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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,132 @@ | ||
| package api | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "context" | ||
| "encoding/binary" | ||
| "encoding/hex" | ||
| "io" | ||
| "net/http" | ||
| "strconv" | ||
| "time" | ||
|
|
||
| "github.com/ethersphere/bee/v2/pkg/cac" | ||
| "github.com/ethersphere/bee/v2/pkg/crypto" | ||
| "github.com/ethersphere/bee/v2/pkg/soc" | ||
| "github.com/ethersphere/bee/v2/pkg/swarm" | ||
| ) | ||
|
|
||
| // FeedService represents Bee's Feed service | ||
| type FeedService service | ||
|
|
||
| // FeedUploadResponse represents a feed upload response | ||
| type FeedUploadResponse struct { | ||
| Reference swarm.Address `json:"reference"` | ||
| Owner string | ||
| Topic string | ||
| } | ||
|
|
||
| // FindFeedUpdateResponse represents a feed update response | ||
| type FindFeedUpdateResponse struct { | ||
| SocSignature string | ||
| Index uint64 | ||
| NextIndex uint64 | ||
| Data []byte | ||
| Reference swarm.Address | ||
| } | ||
|
|
||
| func ownerFromSigner(signer crypto.Signer) (string, error) { | ||
| publicKey, err := signer.PublicKey() | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| ownerBytes, err := crypto.NewEthereumAddress(*publicKey) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| return hex.EncodeToString(ownerBytes), nil | ||
| } | ||
|
|
||
| // CreateRootManifest creates an initial feed root manifest | ||
| func (f *FeedService) CreateRootManifest(ctx context.Context, signer crypto.Signer, topic []byte, o UploadOptions) (*FeedUploadResponse, error) { | ||
| ownerHex, err := ownerFromSigner(signer) | ||
| topicHex := hex.EncodeToString(topic) | ||
| h := http.Header{} | ||
| if o.Pin { | ||
| h.Add(swarmPinHeader, "true") | ||
| } | ||
| h.Add(postageStampBatchHeader, o.BatchID) | ||
| var response FeedUploadResponse | ||
| err = f.client.requestWithHeader(ctx, http.MethodPost, "/"+apiVersion+"/feeds/"+ownerHex+"/"+topicHex, h, nil, &response) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| response.Owner = ownerHex | ||
| response.Topic = topicHex | ||
| return &response, nil | ||
| } | ||
|
|
||
| // UpdateWithReference updates a feed with a reference | ||
| func (f *FeedService) UpdateWithReference(ctx context.Context, signer crypto.Signer, topic []byte, i uint64, addr swarm.Address, o UploadOptions) (*SocResponse, error) { | ||
| ts := make([]byte, 8) | ||
| binary.BigEndian.PutUint64(ts, uint64(time.Now().Unix())) | ||
| ch, err := cac.New(append(append([]byte{}, ts...), addr.Bytes()...)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ownerHex, err := ownerFromSigner(signer) | ||
| index := make([]byte, 8) | ||
| binary.BigEndian.PutUint64(index, i) | ||
| idBytes, err := crypto.LegacyKeccak256(append(append([]byte{}, topic...), index...)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| sch, err := soc.New(idBytes, ch).Sign(signer) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| chunkData := sch.Data() | ||
| signatureBytes := chunkData[swarm.HashSize : swarm.HashSize+swarm.SocSignatureSize] | ||
| id := hex.EncodeToString(idBytes) | ||
| sig := hex.EncodeToString(signatureBytes) | ||
| res, err := f.client.SOC.UploadSOC(ctx, ownerHex, id, sig, bytes.NewReader(ch.Data()), o.BatchID) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return res, nil | ||
| } | ||
|
|
||
| // FindUpdate finds the latest update for a feed | ||
| func (f *FeedService) FindUpdate(ctx context.Context, signer crypto.Signer, topic []byte, o *DownloadOptions) (*FindFeedUpdateResponse, error) { | ||
| ownerHex, err := ownerFromSigner(signer) | ||
| topicHex := hex.EncodeToString(topic) | ||
| res, header, err := f.client.requestDataGetHeader(ctx, http.MethodGet, "/"+apiVersion+"/feeds/"+ownerHex+"/"+topicHex, nil, o) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer res.Close() | ||
| b, err := io.ReadAll(res) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| index, err := strconv.ParseUint(header.Get(swarmFeedIndexHeader), 10, 64) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| nextIndex, err := strconv.ParseUint(header.Get(swarmFeedIndexNextHeader), 10, 64) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| ref, err := swarm.ParseHexAddress(header.Get(etagHeader)) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return &FindFeedUpdateResponse{ | ||
| SocSignature: header.Get(swarmSocSignatureHeader), | ||
| Index: index, | ||
| NextIndex: nextIndex, | ||
| Data: b, | ||
| Reference: ref, | ||
| }, nil | ||
| } | ||
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