Simulating Transactions
The SDK provides a Simulator class for simulating transactions. To run a simulation, call the simulateTransaction method in the simulator namespace on the tenderly instance:
example.js
const transaction = await tenderly.simulator.simulateTransaction({
transaction: {
from: callerAddress,
to: counterContract,
gas: 20000000,
gas_price: '19419609232',
value: 0,
input: counterContractAbiInterface.encodeFunctionData('inc', []),
},
blockNumber: 3237677,
});You can also simulate a bundle of transactions by calling the simulateBundle method:
example.js
const simulations = await tenderly.simulator.simulateBundle({
transactions: [
{
from: fromWalletAddress,
to: myTokenAddress,
gas: 0,
gas_price: '0',
value: 0,
input: myTokenAbiInterface.encodeFunctionData('approve', [toWalletAddress, 1234567890]),
},
{
from: toWalletAddress,
to: myTokenAddress,
gas: 0,
gas_price: '0',
value: 0,
input: myTokenAbiInterface.encodeFunctionData('transferFrom', [
fromWalletAddress,
toWalletAddress,
1234567890,
]),
},
],
blockNumber: 3262454,
overrides: {
[myTokenAddress]: {
state: {
[`_balances[${fromWalletAddress}]`]: '1234567891',
},
},
},
});