Fix evmreader reliability: subscription retry/liveness, idempotent inputs, input count validation, and unified fetch logic

internal/config/generate/Config.toml

@@ -227,6 +227,27 @@ description = """
 Maximum wait time in seconds for the exponential backoff retry policy. The delay between retries for HTTP blockchain requests will never exceed this value, regardless of the backoff calculation."""
 used-by = ["evmreader", "claimer", "node", "prt"]
 
+[rollups.CARTESI_BLOCKCHAIN_WS_LIVENESS_TIMEOUT]
+default = "120"
+go-type = "Duration"
+description = """
+Maximum time in seconds to wait for a new block header on the WebSocket subscription before treating the connection as stalled and reconnecting. Handles silent connection drops where no error is delivered. The default (120s) is tuned for mainnet (~12s block time). Reduce for faster chains or devnets."""
+used-by = ["evmreader", "node"]
+
+[rollups.CARTESI_BLOCKCHAIN_WS_MAX_RETRIES]
+default = "4"
+go-type = "uint64"
+description = """
+Maximum number of consecutive WebSocket subscription failures before the service gives up and exits. A failure is counted only when a subscription attempt produces zero headers before disconnecting. Successful header processing resets the counter."""
+used-by = ["evmreader", "node"]
+
+[rollups.CARTESI_BLOCKCHAIN_WS_RECONNECT_INTERVAL]
+default = "1"
+go-type = "Duration"
+description = """
+Wait time in seconds between WebSocket subscription reconnection attempts after a connection failure."""
+used-by = ["evmreader", "node"]
+
 [rollups.CARTESI_BLOCKCHAIN_MAX_BLOCK_RANGE]
 default = "0"
 go-type = "uint64"