/
client.go
119 lines (99 loc) · 2.53 KB
/
client.go
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package graphql
import (
"context"
"encoding/json"
"fmt"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
gqlclient "github.com/machinebox/graphql"
)
type StorageResponse struct {
Cid string `json:"cid"`
Value common.Hash `json:"value"`
IpldBlock hexutil.Bytes `json:"ipldBlock"`
}
type GetStorageAt struct {
Response StorageResponse `json:"getStorageAt"`
}
type LogResponse struct {
Topics []common.Hash `json:"topics"`
Data hexutil.Bytes `json:"data"`
Transaction TransactionResp `json:"transaction"`
ReceiptCID string `json:"receiptCID"`
Status int32 `json:"status"`
}
type TransactionResp struct {
Hash common.Hash `json:"hash"`
}
type GetLogs struct {
Responses []LogResponse `json:"getLogs"`
}
type Client struct {
client *gqlclient.Client
}
func NewClient(endpoint string) *Client {
client := gqlclient.NewClient(endpoint)
return &Client{client: client}
}
func (c *Client) GetLogs(ctx context.Context, hash common.Hash, address *common.Address) ([]LogResponse, error) {
params := fmt.Sprintf(`blockHash: "%s"`, hash.String())
if address != nil {
params += fmt.Sprintf(`, contract: "%s"`, address.String())
}
getLogsQuery := fmt.Sprintf(`query{
getLogs(%s) {
data
topics
transaction {
hash
}
status
receiptCID
}
}`, params)
req := gqlclient.NewRequest(getLogsQuery)
req.Header.Set("Cache-Control", "no-cache")
var respData map[string]interface{}
err := c.client.Run(ctx, req, &respData)
if err != nil {
return nil, err
}
jsonStr, err := json.Marshal(respData)
if err != nil {
return nil, err
}
var logs GetLogs
err = json.Unmarshal(jsonStr, &logs)
if err != nil {
return nil, err
}
return logs.Responses, nil
}
func (c *Client) GetStorageAt(ctx context.Context, hash common.Hash, address common.Address, slot string) (*StorageResponse, error) {
getLogsQuery := fmt.Sprintf(`
query{
getStorageAt(blockHash: "%s", contract: "%s",slot: "%s") {
cid
value
ipldBlock
}
}
`, hash.String(), address.String(), common.HexToHash(slot))
req := gqlclient.NewRequest(getLogsQuery)
req.Header.Set("Cache-Control", "no-cache")
var respData map[string]interface{}
err := c.client.Run(ctx, req, &respData)
if err != nil {
return nil, err
}
jsonStr, err := json.Marshal(respData)
if err != nil {
return nil, err
}
var storageAt GetStorageAt
err = json.Unmarshal(jsonStr, &storageAt)
if err != nil {
return nil, err
}
return &storageAt.Response, nil
}