Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment
Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
defiQUG
215
backend/api/rest/etherscan.go
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215
backend/api/rest/etherscan.go
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@@ -0,0 +1,215 @@
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package rest
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import (
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"context"
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"encoding/json"
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"fmt"
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"net/http"
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"strconv"
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"time"
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)
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// handleEtherscanAPI handles GET /api?module=...&action=...
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// This provides Etherscan-compatible API endpoints
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func (s *Server) handleEtherscanAPI(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
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return
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}
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module := r.URL.Query().Get("module")
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action := r.URL.Query().Get("action")
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// Etherscan-compatible response structure
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type EtherscanResponse struct {
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Status string `json:"status"`
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Message string `json:"message"`
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Result interface{} `json:"result"`
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}
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// Validate required parameters
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if module == "" || action == "" {
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w.Header().Set("Content-Type", "application/json")
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w.WriteHeader(http.StatusBadRequest)
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response := EtherscanResponse{
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Status: "0",
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Message: "Params 'module' and 'action' are required parameters",
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Result: nil,
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}
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json.NewEncoder(w).Encode(response)
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return
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}
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ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
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defer cancel()
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var response EtherscanResponse
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switch module {
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case "block":
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switch action {
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case "eth_block_number":
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// Get latest block number
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var blockNumber int64
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err := s.db.QueryRow(ctx,
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`SELECT MAX(number) FROM blocks WHERE chain_id = $1`,
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s.chainID,
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).Scan(&blockNumber)
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if err != nil {
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response = EtherscanResponse{
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Status: "0",
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Message: "Error",
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Result: "0x0",
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}
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} else {
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response = EtherscanResponse{
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Status: "1",
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Message: "OK",
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Result: fmt.Sprintf("0x%x", blockNumber),
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}
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}
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case "eth_get_block_by_number":
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tag := r.URL.Query().Get("tag")
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boolean := r.URL.Query().Get("boolean") == "true"
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// Parse block number from tag (can be "latest", "0x...", or decimal)
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var blockNumber int64
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if tag == "latest" {
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err := s.db.QueryRow(ctx,
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`SELECT MAX(number) FROM blocks WHERE chain_id = $1`,
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s.chainID,
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).Scan(&blockNumber)
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if err != nil {
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response = EtherscanResponse{
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Status: "0",
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Message: "Error",
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Result: nil,
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}
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break
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}
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} else if len(tag) > 2 && tag[:2] == "0x" {
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// Hex format
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parsed, err := strconv.ParseInt(tag[2:], 16, 64)
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if err != nil {
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response = EtherscanResponse{
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Status: "0",
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Message: "Invalid block number",
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Result: nil,
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}
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break
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}
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blockNumber = parsed
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} else {
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// Decimal format
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parsed, err := strconv.ParseInt(tag, 10, 64)
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if err != nil {
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response = EtherscanResponse{
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Status: "0",
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Message: "Invalid block number",
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Result: nil,
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}
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break
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}
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blockNumber = parsed
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}
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// Get block data
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var hash, parentHash, miner string
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var timestamp time.Time
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var transactionCount int
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var gasUsed, gasLimit int64
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var transactions []string
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query := `
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SELECT hash, parent_hash, timestamp, miner, transaction_count, gas_used, gas_limit
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FROM blocks
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WHERE chain_id = $1 AND number = $2
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`
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err := s.db.QueryRow(ctx, query, s.chainID, blockNumber).Scan(
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&hash, &parentHash, ×tamp, &miner, &transactionCount, &gasUsed, &gasLimit,
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)
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if err != nil {
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response = EtherscanResponse{
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Status: "0",
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Message: "Block not found",
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Result: nil,
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}
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break
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}
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// If boolean is true, get full transaction objects
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if boolean {
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txQuery := `
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SELECT hash FROM transactions
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WHERE chain_id = $1 AND block_number = $2
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ORDER BY transaction_index
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`
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rows, err := s.db.Query(ctx, txQuery, s.chainID, blockNumber)
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if err == nil {
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defer rows.Close()
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for rows.Next() {
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var txHash string
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if err := rows.Scan(&txHash); err == nil {
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transactions = append(transactions, txHash)
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}
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}
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}
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} else {
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// Just get transaction hashes
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txQuery := `
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SELECT hash FROM transactions
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WHERE chain_id = $1 AND block_number = $2
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ORDER BY transaction_index
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`
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rows, err := s.db.Query(ctx, txQuery, s.chainID, blockNumber)
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if err == nil {
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defer rows.Close()
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for rows.Next() {
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var txHash string
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if err := rows.Scan(&txHash); err == nil {
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transactions = append(transactions, txHash)
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}
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}
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}
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}
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blockResult := map[string]interface{}{
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"number": fmt.Sprintf("0x%x", blockNumber),
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"hash": hash,
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"parentHash": parentHash,
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"timestamp": fmt.Sprintf("0x%x", timestamp.Unix()),
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"miner": miner,
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"transactions": transactions,
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"transactionCount": fmt.Sprintf("0x%x", transactionCount),
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"gasUsed": fmt.Sprintf("0x%x", gasUsed),
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"gasLimit": fmt.Sprintf("0x%x", gasLimit),
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}
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response = EtherscanResponse{
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Status: "1",
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Message: "OK",
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Result: blockResult,
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}
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default:
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response = EtherscanResponse{
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Status: "0",
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Message: "Invalid action",
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Result: nil,
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}
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}
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default:
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response = EtherscanResponse{
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Status: "0",
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Message: "Invalid module",
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Result: nil,
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}
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}
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w.Header().Set("Content-Type", "application/json")
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json.NewEncoder(w).Encode(response)
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}
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