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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,79 @@ | ||
| package ethda | ||
|
|
||
| import ( | ||
| "context" | ||
| "crypto/ecdsa" | ||
| "fmt" | ||
| blobutils "github.com/crustio/blob-utils" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "math/big" | ||
| ) | ||
|
|
||
| type EthdaBackend struct { | ||
| ethdaClient *blobutils.Client | ||
| chainId *big.Int | ||
| ethdaRPCURL string | ||
| privKey *ecdsa.PrivateKey | ||
| } | ||
|
|
||
| func New( | ||
| ethdaRPCURL string, | ||
| privKey *ecdsa.PrivateKey, | ||
| ) (*EthdaBackend, error) { | ||
| if ethdaRPCURL == "" { | ||
| return nil, fmt.Errorf("empty ethda rpc url") | ||
| } | ||
|
|
||
| if privKey == nil { | ||
| return nil, fmt.Errorf("empty private key") | ||
| } | ||
|
|
||
| return &EthdaBackend{ | ||
| privKey: privKey, | ||
| ethdaRPCURL: ethdaRPCURL, | ||
| }, nil | ||
| } | ||
|
|
||
| func (d *EthdaBackend) Init() error { | ||
| ethdaClient, err := blobutils.New(d.ethdaRPCURL, d.privKey) | ||
| if err != nil { | ||
| return fmt.Errorf("create ethda client: %w", err) | ||
| } | ||
|
|
||
| d.ethdaClient = ethdaClient | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (d *EthdaBackend) PostSequence(ctx context.Context, batchesData [][]byte) ([]byte, error) { | ||
| var hashes []byte | ||
| for _, batch := range batchesData { | ||
| hash, err := d.ethdaClient.PostBlob(ctx, batch) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("post batch to ethda: %w", err) | ||
| } | ||
| hashes = append(hashes, hash.Bytes()...) | ||
| } | ||
|
|
||
| return hashes, nil | ||
| } | ||
|
|
||
| func (d *EthdaBackend) GetSequence(ctx context.Context, batchHashes []common.Hash, dataAvailabilityMessage []byte) ([][]byte, error) { | ||
| if len(dataAvailabilityMessage)%common.HashLength != 0 { | ||
| return nil, fmt.Errorf("wrong da message length: %d", len(dataAvailabilityMessage)) | ||
| } | ||
|
|
||
| var data [][]byte | ||
| for i := 0; i < len(dataAvailabilityMessage)/common.HashLength; i++ { | ||
| start := common.HashLength * i | ||
| hash := common.BytesToHash(dataAvailabilityMessage[start : start+common.HashLength]) | ||
|
|
||
| r, err := d.ethdaClient.GetBlob(hash) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("get blob from ethda: %w", err) | ||
| } | ||
| data = append(data, r) | ||
| } | ||
|
|
||
| return data, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| package ethda | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/crypto" | ||
| "github.com/stretchr/testify/require" | ||
| "testing" | ||
| ) | ||
|
|
||
| func TestPostSequence(t *testing.T) { | ||
| rpcUrl := "https://rpc-devnet2.ethda.io" | ||
|
|
||
| // test key | ||
| key, err := crypto.HexToECDSA("f26d6aca18e0c75ac948a262d4b9435a8173515f84c258d1f90d171143039024") | ||
| require.NoError(t, err) | ||
|
|
||
| da, err := New(rpcUrl, key) | ||
| require.NoError(t, err) | ||
|
|
||
| err = da.Init() | ||
| require.NoError(t, err) | ||
|
|
||
| batchData := [][]byte{[]byte("ethda")} | ||
| msg, err := da.PostSequence(context.Background(), batchData) | ||
| require.NoError(t, err) | ||
| fmt.Println(common.Bytes2Hex(msg)) | ||
| } | ||
|
|
||
| func TestGetSequence(t *testing.T) { | ||
| rpcUrl := "https://rpc-devnet2.ethda.io" | ||
|
|
||
| // test key | ||
| key, err := crypto.HexToECDSA("f26d6aca18e0c75ac948a262d4b9435a8173515f84c258d1f90d171143039024") | ||
| require.NoError(t, err) | ||
| da, err := New(rpcUrl, key) | ||
| require.NoError(t, err) | ||
|
|
||
| err = da.Init() | ||
| require.NoError(t, err) | ||
|
|
||
| data, err := da.GetSequence(context.Background(), nil, common.Hex2Bytes("76b56f65beab1cfe55242eb97eebfe2f32aacd957f202122835026bffb3ba282")) | ||
| require.NoError(t, err) | ||
| fmt.Println(data) | ||
| } |
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