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Safer is a tool that helps you sign & submit transactions to a Safe, without requiring any interaction with Safe's backend or frontend.

Safer is a set of Foundry scripts that can be used as fallback in case Safe App is down and the blockchain is the only thing that can be trusted.

Safer enables submitting complex transactions without the need of intermediaries.

Safer unlocks true DAO resilience.

• InstallFoundry.
• Runmake to initialize the repository.
• Create a.env file from the template.env.example file.
  • Set the environment variableSENDER to the address used to execute the transaction on the Safe. If you don't execute the tx, you don't need to set it.
  • Use the environment variableSAFE_NONCE to override a transaction's nonce. Remove it to use the default, latest Safe nonce. Leave it blank to use nonce 0.
  • Use the environment variableFOUNDRY_ETH_RPC_URL to customize the RPC endpoint used. This is useful to interact with a Safe deployed on another chain than Ethereum mainnet (the default one).

• Runmake tx and follow the steps to create a Safe transaction usingcreate-safe-tx; OR
• Put the transaction's raw data indata/tx.json

1. To sign the data with a Ledger, run:make sign:ledger
2. Share the content ofdata/signatures.txt with the signer who will execute the transaction on the Safe

1. Make sure at leastthreshold signatures are available indata/signatures.txt, each one per line
2. To execute the transaction on the Safe with a Ledger, run:make exec:ledger

Withmake sign &make exec, one can also use any other wallet provider available withcast:

• make cmd:interactive to input the private key to the command prompt
• make cmd:ledger to use a Ledger
• make cmd:trezor to use a Trezor
• make cmd:keystore to use a keystore
• make cmd:"private-key 0x..." if you really want to save your private key to your shell's history...

You can also append anycast parameter:

• make sign:"ledger --mnemonic 1 --mnemonic-index 1" ormake exec:"ledger --mnemonics foo --mnemonic-indexes 1" to use another account than the default one at index0

{"to":"0x0000000000000000000000000000000000000000","value":"0",// The tx value (in ETH), must be a string"data":"0x",// The raw tx data, must start with 0x"operation":0,// 0 for a call, 1 for a delegatecall"safeTxGas":0,"baseGas":0,"gasPrice":0,"gasToken":"0x0000000000000000000000000000000000000000",// Indicates the tx will consume the chain's default gas token (ETH on mainnet)"refundReceiver":"0x0000000000000000000000000000000000000000"// Indicates the tx's refund receiver will be the address executing the tx}