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https://github.com/manifoldfinance/bundle-simulator
Standalone simulator for debugging bundles
https://github.com/manifoldfinance/bundle-simulator
brownie bundle ethereum flashbots foundry mev nix simulator solidity
Last synced: about 1 month ago
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Standalone simulator for debugging bundles
- Host: GitHub
- URL: https://github.com/manifoldfinance/bundle-simulator
- Owner: manifoldfinance
- License: mpl-2.0
- Created: 2022-03-22T13:51:00.000Z (almost 3 years ago)
- Default Branch: main
- Last Pushed: 2022-07-07T12:31:59.000Z (over 2 years ago)
- Last Synced: 2024-05-19T00:36:35.172Z (7 months ago)
- Topics: brownie, bundle, ethereum, flashbots, foundry, mev, nix, simulator, solidity
- Language: Solidity
- Homepage:
- Size: 42 KB
- Stars: 26
- Watchers: 7
- Forks: 2
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE.txt
Awesome Lists containing this project
README
# Bundle Simulator
Standalone repo for simulating specific bundles that need debugging.
## Requirements
Have installed the following:
- Nix (or Brownie directly)
- ganache-cli (npm install ganache-cli)
## Use Brownie
Just issue the following command:
```sh
nix-shell
```
After a couple of minutes you should be inside of `nix-shell` with brownie in our `PATH`. We can quickly double check with:
```sh
which brownie
```
## Run simulations
Use `scripts/backrun_test1.py` as a template to construct bundle specifics. Note also the target block number for the bundle.
### Create a fork
By default brownie includes a list of providers that can be checked with:
```sh
brownie networks list
```
Create a fork at a specific block for the bundle. Note that the fork will need to occur at target block number - 1.
```sh
brownie networks add development backrun1 cmd="ganache-cli" host=http://127.0.0.1 fork="$ETH_RPC_URL@14430476" accounts=10 mnemonic=brownie port=8545 timeout=100
```
### Run script
```sh
brownie run backrun_test1.py --network backrun1
```
Result:
```python
Running 'scripts/backrun_test1.py::main'...
Deploy flashloan contract
Transaction sent: 0xf4223827831aea7b60c3169ebf1191c22a84cd104708ec050e6da07e36a06fac
Gas price: 0.0 gwei Gas limit: 6721975 Nonce: 34
AaveFlashloanMultiRouter.constructor confirmed Block: 14430478 Gas used: 1930680 (28.72%)
AaveFlashloanMultiRouter deployed at: 0xa54A0c47330a78E2C1abcD22BB477Dc760fC77b5
Approving User swap
Transaction sent: 0x04cc7d99ed3fd237f535960f9cc2a52135e5d0a1bd8b5bde295f9dccd86a7e70
Gas price: 0.0 gwei Gas limit: 6721975 Nonce: 19
Transaction confirmed Block: 14430479 Gas used: 30103 (0.45%)
User swap
Transaction sent: 0x5399fef87774f51195ebaf854e9fd75b5ec1a71eeb73c14a7a2a56a22b88b975
Gas price: 0.0 gwei Gas limit: 6721975 Nonce: 20
Transaction confirmed Block: 14430480 Gas used: 156025 (2.32%)
Backrun arb
Platform pre-arb weth balance: 1113136168719190148
Transaction sent: 0x97ce6a340493a7332cfb7ca395e022c5bc7d8acbc9d334661d60ceba4d76d440
Gas price: 0.0 gwei Gas limit: 6721975 Nonce: 35
AaveFlashloanMultiRouter.call confirmed Block: 14430481 Gas used: 443855 (6.60%)
Platform post-arb weth balance: 1160664762353910714
```
### Debugging
[See Brownie docs for info on tx tracing](https://eth-brownie.readthedocs.io/en/stable/core-transactions.html)