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Merge pull request #77 from vulcanize/ashwinp-gql-get-storage-n-logs
GQL API for getStorageAt and getLogs
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,104 @@ | ||
package graphql | ||
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import ( | ||
"context" | ||
"encoding/json" | ||
"fmt" | ||
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"github.com/ethereum/go-ethereum/common" | ||
"github.com/ethereum/go-ethereum/common/hexutil" | ||
gqlclient "github.com/machinebox/graphql" | ||
) | ||
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type StorageResponse struct { | ||
Cid string `json:"cid"` | ||
Value common.Hash `json:"value"` | ||
IpldBlock hexutil.Bytes `json:"ipldBlock"` | ||
} | ||
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type GetStorageAt struct { | ||
Response StorageResponse `json:"getStorageAt"` | ||
} | ||
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type LogResponse struct { | ||
Topics []common.Hash `json:"topics"` | ||
Data hexutil.Bytes `json:"data"` | ||
} | ||
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type GetLogs struct { | ||
Responses []LogResponse `json:"getLogs"` | ||
} | ||
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type Client struct { | ||
client *gqlclient.Client | ||
} | ||
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func NewClient(endpoint string) *Client { | ||
client := gqlclient.NewClient(endpoint) | ||
return &Client{client: client} | ||
} | ||
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func (c *Client) GetLogs(ctx context.Context, hash common.Hash, address common.Address) ([]LogResponse, error) { | ||
getLogsQuery := fmt.Sprintf(` | ||
query{ | ||
getLogs(blockHash: "%s", contract: "%s") { | ||
data | ||
topics | ||
} | ||
} | ||
`, hash.String(), address.String()) | ||
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req := gqlclient.NewRequest(getLogsQuery) | ||
req.Header.Set("Cache-Control", "no-cache") | ||
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var respData map[string]interface{} | ||
err := c.client.Run(ctx, req, &respData) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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jsonStr, err := json.Marshal(respData) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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var logs GetLogs | ||
err = json.Unmarshal(jsonStr, &logs) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return logs.Responses, nil | ||
} | ||
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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)) | ||
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req := gqlclient.NewRequest(getLogsQuery) | ||
req.Header.Set("Cache-Control", "no-cache") | ||
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var respData map[string]interface{} | ||
err := c.client.Run(ctx, req, &respData) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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jsonStr, err := json.Marshal(respData) | ||
if err != nil { | ||
return nil, err | ||
} | ||
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var storageAt GetStorageAt | ||
err = json.Unmarshal(jsonStr, &storageAt) | ||
if err != nil { | ||
return nil, err | ||
} | ||
return &storageAt.Response, nil | ||
} |
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