♻️ Enforce EIP-55 Checksums for Addresses

[pcaversaccio]

🕓 Changelog

This PR updates the validate_address function to enforce EIP-55 checksummed addresses. This ensures that all addresses submitted to the Safe transaction service API are correctly checksummed, preventing potential API errors caused by incorrectly-cased addresses. Furthermore, we redirect all error messages in the functions check_required_tools, get_latest_git_commit_hash, and the Bash version check to stderr for proper error handling.

Test Examples

Test Case 1

./safe_hashes.sh --network sepolia --address 0x657FF0D4EC65D82B2BC1247B0A558BCD2F80A0F1 --nonce 4

returns:

Invalid checksum: "0x657FF0D4EC65D82B2BC1247B0A558BCD2F80A0F1" (expected "0x657ff0D4eC65D82b2bC1247b0a558bcd2f80A0f1")

Test Case 2

./safe_hashes.sh --network sepolia --address 0x657ff0D4eC65D82b2bC1247b0a558bcd2f80A0f1 --nonce 4 --nested-safe-address 0x6bc56d6ce87c86cb0756c616becfd3cd32b09251 --nested-safe-nonce 4

returns:

Invalid checksum: "0x6bc56d6ce87c86cb0756c616becfd3cd32b09251" (expected "0x6bc56d6CE87C86CB0756c616bECFD3Cd32b09251")