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KillariDev 2024-09-25 10:52:04 +03:00
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docs/interacting-with-geth/rpc/ns-eth.md
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@ -6,7 +6,7 @@ description: Documentation for the JSON-RPC API "eth" namespace
Documentation for the API methods in the `eth` namespace can be found on [ethereum.org](https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_protocolversion). Geth provides several extensions to the standard "eth" JSON-RPC namespace that are defined below.
### eth_simulateV1 {#eth-simulate-v1}
The `eth_simulateV1` method allows the simulation of multiple blocks and transactions without creating transactions or blocks on the blockchain. It functions similarly to `eth_call`, but offers more control. Like `eth_call`, `eth_simulateV1` has a maximum gas limit for the entire simulation.
The `eth_simulateV1` method allows the simulation of multiple blocks and transactions without creating transactions or blocks on the blockchain. It functions similarly to `eth_call`, but offers more control. Like `eth_call`, `eth_simulateV1` has a maximum gas limit for the entire simulation, this limit can be adjusted with command line parameter `--rpc.gascap`.
**Parameters:**
The method takes two parameters:
@ -17,11 +17,11 @@ The `eth_simulate` payload structure:
| Field | Type | Optional | Default | Description |
| :----------------------- | :---------------- | :------- | :------ | :------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `blockStateCalls` | `BlockStateCalls` | False | N/A | Definition of blocks that can contain calls and overrides |
| `traceTransfers` | `Binary` | Yes | False | Adds ETH transfers as ERC20 transfer events to the logs. These transfers have emitter contract parameter set as address(`0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee`). This allows you to track movements of ETH in your calls. |
| `validation` | `Binary` | Yes | False | When true, the `eth_simulateV1` does all the validation that a normal EVM would do, except contract sender and signature checks. When false, `eth_simulateV1` behaves like `eth_call`. |
| `returnFullTransactions` | `Binary` | Yes | False | When true, the method returns full transaction objects, otherwise, just hashes are returned. |
| `traceTransfers` | `bool` | Yes | False | Adds ETH transfers as ERC20 transfer events to the logs. These transfers have emitter contract parameter set as address(`0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee`). This allows you to track movements of ETH in your calls. |
| `validation` | `bool` | Yes | False | When true, the `eth_simulateV1` does all the validation that a normal EVM would do, except contract sender and signature checks. When false, `eth_simulateV1` behaves like `eth_call`. |
| `returnFullTransactions` | `bool` | Yes | False | When true, the method returns full transaction objects, otherwise, just hashes are returned. |
`BlockStateCalls` is an array of objects, the single object definition is described below. The size of this array may be limited depending on the client as a DOS protection. 256 is a common/recommended limit as it is the same limit used by BLOCKHASH opcode.
`BlockStateCalls` is an array of objects, the single object definition is described below. The total number of blocks for a single request is limited to 256. This includes any gap blocks that client generated.
| Field | Type | Description |
| :--------------- | :------------------------- | :----------------------------------------------------------------------------------------------------------- |
| `blockOverrides` | `BlockOverrides` | Overrides fields such as block number or time in a simulated block. |
@ -71,12 +71,12 @@ On failure:
| `error` | `{ code: uint64, message: string, data: bytes }` | Error code, data and message |
On success:
| Field | Type | Description |
| :----------- | :---------------- | :----------------------------------------------- |
| `status` | `"0x1"` | Status indicating that the transaction succeeded |
| `returnData` | `bytes` | Transactions return data |
| `gasUsed` | `uint64` | Gas used by the transaction |
| `logs` | `CallResultLog[]` | Error code and message |
| Field | Type | Description |
| :----------- | :---------------- | :------------------------------------------------------------------------------------- |
| `status` | `"0x1"` | Status indicating that the transaction succeeded |
| `returnData` | `bytes` | Transactions return data |
| `gasUsed` | `uint64` | Gas used by the transaction |
| `logs` | `CallResultLog[]` | Log events emitted during call. This includes ETH logs, if `traceTransfers` is enabled |
the `CallResultLog` is object of form:
| Field | Type | Description |