✨ Message Hash Logic for < 1.0.0 Safe Versions

[pcaversaccio]

🕓 Changelog

Safe multisig versions < 1.0.0 use a legacy (i.e. the parameter value baseGas was called dataGas previously) SAFE_TX_TYPEHASH value:

//keccak256(
//    "SafeTx(address to,uint256 value,bytes data,uint8 operation,uint256 safeTxGas,uint256 dataGas,uint256 gasPrice,address gasToken,address refundReceiver,uint256 nonce)"
//);
bytes32 public constant SAFE_TX_TYPEHASH = 0x14d461bc7412367e924637b363c7bf29b8f47e2f84869f4426e5633d8af47b20;

Starting with version 1.0.0, baseGas was introduced: safe-global/safe-smart-account#90.

This PR introduces additional logic to the script to accommodate the breaking change in Safe versions. Furthermore, all Safe versions < 0.1.0 are not supported and the script issues as warning to the user.

Testing

Ethereum:

The Safe multisig 0xecd11858a4bcc35A51084Ebe672beaCe01142fcA is based on version 0.1.0.

Run:

./safe_hashes.sh --network ethereum --address 0xecd11858a4bcc35A51084Ebe672beaCe01142fcA --nonce 61

> Hashes:
Domain hash: 0x4181D94EE9F43DC08D31A2C86EB37B704F2051787A9C84D1397A60D07136D1C1
Message hash: 0xA6CF82FF9752EACE8FA8389C19C6B5FA8706AE702D7CF07F7B6734E73BFCD27D
Safe transaction hash: 0x85a7e913bba17df41ff87ce425bdf950ad8fa02343ec1c7652a823c1b2a9dab5

To verify the domain hash, you can use cast:

cast call 0xecd11858a4bcc35A51084Ebe672beaCe01142fcA "domainSeparator()" -r https://eth.llamarpc.com

which will output:

0x4181d94ee9f43dc08d31a2c86eb37b704f2051787a9c84d1397a60d07136d1c1

For the message hash and the Safe transaction hash, you can use the evaluate feature of Tenderly in one of the multisig transactions:

https://dashboard.tenderly.co/tx/mainnet/0xc139e324bc231c5f7b8a9a27e775295118e9cbc06995f89225261abd0420f362/debugger?trace=0.1.1.0

https://dashboard.tenderly.co/tx/mainnet/0xc139e324bc231c5f7b8a9a27e775295118e9cbc06995f89225261abd0420f362/debugger?trace=0.1.2