simulateBlocks

Name: viem-go
Author: viem-go

Simulates multiple blocks and returns their results

Import

Import the public actions package so you can call this action.

import "github.com/ChefBingbong/viem-go/actions/public"

Usage

An example showing how to configure block simulations and inspect their results.

import (
  "context"
  "log"

  "github.com/ethereum/go-ethereum/common"
  "github.com/ChefBingbong/viem-go/actions/public"
  "github.com/ChefBingbong/viem-go/client"
  "github.com/ChefBingbong/viem-go/client/transport"
  "github.com/ChefBingbong/viem-go/chain/definitions"
)

ctx := context.Background()

publicClient, err := client.CreatePublicClient(client.PublicClientConfig{
  Chain:     definitions.Mainnet,
  Transport: transport.HTTP("https://eth.llamarpc.com"),
})
if err != nil {
  log.Fatal(err)
}
defer func() { _ = publicClient.Close() }()

contractAddr := common.HexToAddress("0x...")
calldata := common.FromHex("0x...")

result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{
  Blocks: []public.SimulateBlock{
      {
          Calls: []public.SimulateBlockCall{
              {
                  To:   &contractAddr,
                  Data: calldata,
              },
          },
      },
  },
})
if err != nil {
  log.Fatal(err)
}
log.Printf("Simulated %d blocks", len(result))

Returns

[]BlockResult

An array of block results, each containing:

Block formatters.Block - The simulated block data
Calls []CallResult - The results of each call in the block

Parameters

Configuration options accepted by this action.

Blocks

Type: []SimulateBlock
Required

The blocks to simulate.

result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{
  Blocks: []public.SimulateBlock{
      {
          Calls: []public.SimulateBlockCall{
              {
                  To:   &contractAddr,
                  Data: calldata,
              },
          },
      },
  },
})

BlockNumber

Type: *uint64
Optional

The block number to simulate at.

blockNum := uint64(12345)
result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{
  Blocks:      []public.SimulateBlock{...},
  BlockNumber: &blockNum,
})

BlockTag

Type: BlockTag
Optional

The block tag to simulate at (e.g., "latest", "pending").

result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{
  Blocks:   []public.SimulateBlock{...},
  BlockTag: public.BlockTagSafe,
})

ReturnFullTransactions

Type: bool
Default: false
Optional

Whether to return full transaction objects.

result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{
  Blocks:                []public.SimulateBlock{...},
  ReturnFullTransactions: true,
})

TraceTransfers

Type: bool
Default: false
Optional

Enables transfer tracing.

result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{
  Blocks:        []public.SimulateBlock{...},
  TraceTransfers: true,
})

Validation

Type: bool
Default: false
Optional

Enables validation mode.

result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{
  Blocks:     []public.SimulateBlock{...},
  Validation: true,
})

JSON-RPC Method

Underlying JSON-RPC method used by this action.

Uses eth_simulateV1 (if supported) for block simulation.

import ( "context" "log" "github.com/ethereum/go-ethereum/common" "github.com/ChefBingbong/viem-go/actions/public" "github.com/ChefBingbong/viem-go/client" "github.com/ChefBingbong/viem-go/client/transport" "github.com/ChefBingbong/viem-go/chain/definitions" ) ctx := context.Background() publicClient, err := client.CreatePublicClient(client.PublicClientConfig{ Chain: definitions.Mainnet, Transport: transport.HTTP("https://eth.llamarpc.com"), }) if err != nil { log.Fatal(err) } defer func() { _ = publicClient.Close() }() contractAddr := common.HexToAddress("0x...") calldata := common.FromHex("0x...") result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{ Blocks: []public.SimulateBlock{ { Calls: []public.SimulateBlockCall{ { To: &contractAddr, Data: calldata, }, }, }, }, }) if err != nil { log.Fatal(err) } log.Printf("Simulated %d blocks", len(result))

result, err := public.SimulateBlocks(ctx, publicClient, public.SimulateBlocksParameters{ Blocks: []public.SimulateBlock{ { Calls: []public.SimulateBlockCall{ { To: &contractAddr, Data: calldata, }, }, }, }, })