Foundry

Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

Foundry consists of:

• Forge: Ethereum testing framework (like Truffle, Hardhat and DappTools).
• Cast: Swiss army knife for interacting with EVM smart contracts, sending transactions and getting chain data.
• Anvil: Local Ethereum node, akin to Ganache, Hardhat Network.
• Chisel: Fast, utilitarian, and verbose solidity REPL.

Documentation

https://book.getfoundry.sh/

Usage

Build

$ forge build

Test

$ forge test

Format

$ forge fmt

Gas Snapshots

$ forge snapshot

Anvil

$ anvil

Deploy

$ forge script script/Counter.s.sol:CounterScript --rpc-url <your_rpc_url> --private-key <your_private_key>

Cast

$ cast <subcommand>

Help

$ forge --help
$ anvil --help
$ cast --help

TEST

forge test --fork-url https://bsc-dataseed.binance.org/ -vvvv

Hook calls

forge test --fork-url https://bsc-dataseed.binance.org/ -vvvv | grep 0x0000000000000000000000000000000000003fFF
    ├─ [612487] UniswapV4LiquidityHelper::createUniswapPair(MockERC20: [0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f], MockERC20: [0x2e234DAe75C793f67A35089C9d99245E1C58470b], 1000000000000000000000 [1e21], 1000000000000000000000 [1e21],0x0000000000000000000000000000000000003fFF)
    │   ├─ [33568] 0x28e2Ea090877bF75740558f6BFB36A5ffeE9e9dF::initialize(PoolKey({ currency0: 0x2e234DAe75C793f67A35089C9d99245E1C58470b, currency1: 0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f, fee: 10000 [1e4], tickSpacing: 200, hooks: 0x0000000000000000000000000000000000003fFF }), 79228162514264337593543950336 [7.922e28])
    │   │   ├─ [2035] 0x0000000000000000000000000000000000003fFF::beforeInitialize(UniswapV4LiquidityHelper: [0xF62849F9A0B5Bf2913b396098F7c7019b51A820a], PoolKey({ currency0: 0x2e234DAe75C793f67A35089C9d99245E1C58470b, currency1: 0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f, fee: 10000 [1e4], tickSpacing: 200, hooks: 0x0000000000000000000000000000000000003fFF }), 79228162514264337593543950336 [7.922e28])
    │   │   ├─ emit Initialize(id: 0xe54f16aef8551f38071585a631177e07dd0456dea435a45f9f0bf01d6daae9a7, currency0: MockERC20: [0x2e234DAe75C793f67A35089C9d99245E1C58470b], currency1: MockERC20: [0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f], fee: 10000 [1e4], tickSpacing: 200, hooks: 0x0000000000000000000000000000000000003fFF, sqrtPriceX96: 79228162514264337593543950336 [7.922e28], tick: 0)
    │   │   ├─ [464] 0x0000000000000000000000000000000000003fFF::afterInitialize(UniswapV4LiquidityHelper: [0xF62849F9A0B5Bf2913b396098F7c7019b51A820a], PoolKey({ currency0: 0x2e234DAe75C793f67A35089C9d99245E1C58470b, currency1: 0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f, fee: 10000 [1e4], tickSpacing: 200, hooks: 0x0000000000000000000000000000000000003fFF }), 79228162514264337593543950336 [7.922e28], 0)
    │   │   │   │   ├─ [169940] 0x28e2Ea090877bF75740558f6BFB36A5ffeE9e9dF::modifyLiquidity(PoolKey({ currency0: 0x2e234DAe75C793f67A35089C9d99245E1C58470b, currency1: 0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f, fee: 10000 [1e4], tickSpacing: 200, hooks: 0x0000000000000000000000000000000000003fFF }), ModifyLiquidityParams({ tickLower: -887200 [-8.872e5], tickUpper: 887200 [8.872e5], liquidityDelta: 1000000000000000000054 [1e21], salt: 0x0000000000000000000000000000000000000000000000000000000000000880 }), 0x)
    │   │   │   │   │   ├─ [2650] 0x0000000000000000000000000000000000003fFF::beforeAddLiquidity(0x7A4a5c919aE2541AeD11041A1AEeE68f1287f95b, PoolKey({ currency0: 0x2e234DAe75C793f67A35089C9d99245E1C58470b, currency1: 0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f, fee: 10000 [1e4], tickSpacing: 200, hooks: 0x0000000000000000000000000000000000003fFF }), ModifyLiquidityParams({ tickLower: -887200 [-8.872e5], tickUpper: 887200 [8.872e5], liquidityDelta: 1000000000000000000054 [1e21], salt: 0x0000000000000000000000000000000000000000000000000000000000000880 }), 0x)
    │   │   │   │   │   ├─ [713] 0x0000000000000000000000000000000000003fFF::afterAddLiquidity(0x7A4a5c919aE2541AeD11041A1AEeE68f1287f95b, PoolKey({ currency0: 0x2e234DAe75C793f67A35089C9d99245E1C58470b, currency1: 0x5615dEB798BB3E4dFa0139dFa1b3D433Cc23b72f, fee: 10000 [1e4], tickSpacing: 200, hooks: 0x0000000000000000000000000000000000003fFF }), ModifyLiquidityParams({ tickLower: -887200 [-8.872e5], tickUpper: 887200 [8.872e5], liquidityDelta: 1000000000000000000054 [1e21], salt: 0x0000000000000000000000000000000000000000000000000000000000000880 }), -340282366920938463463034325064847272993536625392568231788544 [-3.402e59], 0, 0x)

TEST2 (decimals 6 and 18)

forge test --fork-url https://bsc-dataseed.binance.org/ -vvvv | grep delta
  delta.amount0 -10000000000000000000
  delta.amount1 9802950
    │   │   │   │   │   │   ├─ [0] console::log("delta.amount0", -10000000000000000000 [-1e19]) [staticcall]
    │   │   │   │   │   │   ├─ [0] console::log("delta.amount1", 9802950 [9.802e6]) [staticcall]

TEST3 (decimals 18 and 18)

forge test --fork-url https://bsc-dataseed.binance.org/ -vvvv | grep delta
  delta.amount0 -10000000000000000000
  delta.amount1 9802950787206654124
    │   │   │   │   │   │   ├─ [0] console::log("delta.amount0", -10000000000000000000 [-1e19]) [staticcall]
    │   │   │   │   │   │   ├─ [0] console::log("delta.amount1", 9802950787206654124 [9.802e18]) [staticcall]

TEST4 (correct estimate swap amountOut)

forge test --fork-url https://bsc-dataseed.binance.org/ -vvvv | grep delta
  afterSwap :: delta.amount0 -10000000000000000000
  afterSwap :: delta.amount1 9802950787206654124
    │   │   │   │   │   │   ├─ [0] console::log("afterSwap :: delta.amount0", -10000000000000000000 [-1e19]) [staticcall]
    │   │   │   │   │   │   ├─ [0] console::log("afterSwap :: delta.amount1", 9802950787206654124 [9.802e18]) [staticcall]
forge test --fork-url https://bsc-dataseed.binance.org/ -vvvv | grep estimatedOut
  estimatedOut (without slippage) 9802950787206654124
    │   ├─ [0] console::log("estimatedOut (without slippage)", 9802950787206654124 [9.802e18]) [staticcall]

TEST5 (createUniswapPairOneSide :: token0 only)

sqrtPriceX96, so that it is guaranteed to:

be lower than sqrtPriceAtTick(tickLower) → then it will be a 0-only token

be higher than sqrtPriceAtTick(tickUpper) → then it will be a 1-only token

fall inside the range → then both tokens will be required

andrey@v510:~/valory/t1/univ4-experiment$ forge test --fork-url https://bsc-dataseed.binance.org/ -vvvv | grep LiquidityAddedOneSide
    │   ├─ emit LiquidityAddedOneSide(poolId: 0xd41d79d94c12e7d5638388ff203ea0f9c4b1f8654fb6703cab294f75d29204ae, liquidity: 101515882869044476600630 [1.015e23])
andrey@v510:~/valory/t1/univ4-experiment$ 

Optimized version find_salt

sudo apt update
sudo apt install libssl-dev
g++ -o find_salt find_salt.cpp -O2 -fopenmp -lssl -lcrypto

./find_salt 4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97 c03eca48ffa996bd8d5e3be48957efde5e1b3e6d1d11323bc2f18dd403744432
or
./find_salt 4838B106FCe9647Bdf1E7877BF73cE8B0BAD5f97 c03eca48ffa996bd8d5e3be48957efde5e1b3e6d1d11323bc2f18dd403744432 2400
Found salt: 611b580e675bacaa4ad87a3a8ec25c59e16546ee4c42aad1c3fe783dee7c1de6
Generated address: 20254e1759c04396833dbfe34beeba869ab62400

Verify:
nano check_find_salt.py
edit
SALT = "611b580e675bacaa4ad87a3a8ec25c59e16546ee4c42aad1c3fe783dee7c1de6"
python3 check_find_salt.py
Computed Address: 0x20254e1759c04396833dbfe34beeba869ab62400
0x20254e1759c04396833dbfe34beeba869ab62400 == 20254e1759c04396833dbfe34beeba869ab62400