This code is experimental and not audited.

To Build a Safe Transaction:

1. Complete the parameters in the file transaction_builder/script/utils/Constants.sol.
2. Create a new script inheriting from Base_Script (see transaction_builder/script/examples/*).
3. Run the script:
   • Go to the transaction_builder repository
   • Run "forge script <SCRIPT_NAME> --rpc-url <RPC_URL>"
4. The script will output the raw data of the transaction in the file "script/output.txt".

To generate the signatures for a Safe Transaction:

1. Complete the config file transaction_signer/config_transaction_signer.toml.
   • Complete the safes dict.
   • Complete the signers dict.
   • Complete the relayers (address broadcasting the transaction) dict.
   • Complete the raw data, obtained from the Safe Transaction Builder.
2. Create a .env file with:
   • HTTP_PROVIDER: An rpc-url for the chain the safe is deployed on.
   • KEY_NAME: If using hot wallets, A private key with the KEY_NAME as set in the config file.
   • If simulating transactions on Tenderly, set TENDERLY_KEY, TENDERLY_ACCOUNT and TENDERLY_PROJECT.
3. Run the script:
   • Go to the transaction_signer repository.
   • Run "poetry run python main.py".
   • Select the Safe.
   • Optionally, select: "Simulate transaction on Tenderly".
   • Select "Sign Message".
   • Select the Signer.
   • For the signers, the following devices are currently supported:
     • Trezor T (clear signing).
     • Trezor 1 (blind signing).
     • Ledger Nano S (sign domain and message hash).
     • Hot Wallet (blind signing).
4. The signature is saved in the file "transaction_signer/out/signatures.txt".
5. If multiple signatures are required:
   • Or Collect all signatures locally.
   • Or share the config_transaction_signer.toml and signatures.txt with the signers (can be done by forking this repo and share via git or any other means).
   • Repeat steps 3 and 4.

To broadcast the signed Safe Transaction:

1. The threshold of required number of signatures must be reached
2. Run the script:
   • Go to the transaction_signer repository.
   • Run "poetry run python main.py".
   • Select the Safe.
   • Optionally: Simulate transaction on Tenderly.
   • Select "Broadcast signed Safe tx".
   • Select the Relayer (can be any address, must not be one of signers).
   • For the relayers, the following devices are currently supported:
     • Trezor T (clear signing).
     • Hot Wallet (blind signing).