BNB Smart Chain
BNB Smart Chain
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El plan gratuito cubre proyectos personales. El pago por uso escala sin necesidad de tarjeta.
BNB Smart Chain
El plan gratuito cubre proyectos personales. El pago por uso escala sin necesidad de tarjeta.
debug_traceCall runs a call against a chosen block's state and hands back a full opcode-level trace, all without submitting a transaction or burning a single unit of gas. BNB Smart Chain (BSC) charges that gas in BNB and hosts the BEP-20 contracts behind protocols like PancakeSwap and Venus, so a dry run that costs nothing is genuinely useful here. Aim it at chain ID 56 via https://bsc.therpc.io/YOUR_API_KEY. The call object and block parameter are only the start: state and block overrides let you rehearse a contract interaction under hypothetical balances or an invented block context. Any block but the latest forces a reach back into historical state, which is heavy, so plan on a debug-enabled archive node.
| # | Nombre | Tipo | Requerido | Descripción |
|---|---|---|---|---|
| 1 | transaction | object | Sí | Call object — same fields as eth_call: `from?`, `to`, `gas?`, `gasPrice?`, `maxFeePerGas?`, `maxPriorityFeePerGas?`, `value?`, `data?`. |
| 2 | blockParameter | string | No | Block number or tag defining the state against which the call is simulated.Predeterminado: latest |
| 3 | options | object | No | Same tracer configuration object as debug_traceTransaction (tracer, tracerConfig, timeout, reexec, enableMemory, enableReturnData, disableStack, disableStorage, limit, debug). |
| 4 | stateOverrides | object | No | Optional map of address → { balance, nonce, code, state, stateDiff } overrides applied only for this call. |
| 5 | blockOverrides | object | No | Optional map of block-context fields to override (e.g. `number`, `time`, `gasLimit`, `coinbase`, `random`, `baseFee`) for the simulated call. |
| Tipo | Descripción |
|---|---|
| object | Same shape as debug_traceTransaction: structLog array with default tracer, or tracer-specific object (callTracer, prestateTracer, etc.). |
Try it live in the BNB Smart Chain playground.
| Código | Mensaje | Causa |
|---|---|---|
-32601 | Method not found | debug namespace not enabled on the node. |
-32602 | Invalid params | Transaction object is missing required fields or blockParameter is unrecognized. |
-32000 | execution reverted | Simulated call reverted; trace is still returned up to the revert point. |
callTracer, or just switch off the stack and storage dumps. Heavy traces may get throttled on lower tiers.Parámetros
Call object — same fields as eth_call: `from?`, `to`, `gas?`, `gasPrice?`, `maxFeePerGas?`, `maxPriorityFeePerGas?`, `value?`, `data?`.
hex block number or "latest" | "earliest" | "pending"
Same tracer configuration object as debug_traceTransaction (tracer, tracerConfig, timeout, reexec, enableMemory, enableReturnData, disableStack, disableStorage, limit, debug).
Optional map of address → { balance, nonce, code, state, stateDiff } overrides applied only for this call.
Optional map of block-context fields to override (e.g. `number`, `time`, `gasLimit`, `coinbase`, `random`, `baseFee`) for the simulated call.