safe-multisig-on-abstract

Safe Multisig on Abstract

Safe (formerly Gnosis Safe) is the standard multi-signature wallet on Abstract. Use it when multiple parties must approve transactions before execution — treasury management, team wallets, DAO operations, or any scenario requiring shared custody.

A Safe web interface is live at safe.abs.xyz.

Quick Start (Web UI)

For non-programmatic use, create and manage Safes directly at safe.abs.xyz. Connect a wallet, add owner addresses, set the confirmation threshold, and deploy.

Quick Start (SDK — Create a Safe)

npm install @safe-global/protocol-kit viem

import Safe, { SafeAccountConfig, PredictedSafeProps } from "@safe-global/protocol-kit";
import { abstract } from "viem/chains";

const safeAccountConfig: SafeAccountConfig = {
  owners: [
    "0xOwner1Address",
    "0xOwner2Address",
    "0xOwner3Address",
  ],
  threshold: 2,
};

const predictedSafe: PredictedSafeProps = { safeAccountConfig };

const protocolKit = await Safe.init({
  provider: abstract.rpcUrls.default.http[0],
  signer: DEPLOYER_PRIVATE_KEY,
  predictedSafe,
});

const safeAddress = await protocolKit.getAddress();

const deploymentTx = await protocolKit.createSafeDeploymentTransaction();
const client = await protocolKit.getSafeProvider().getExternalSigner();

const txHash = await client!.sendTransaction({
  to: deploymentTx.to as `0x${string}`,
  value: BigInt(deploymentTx.value),
  data: deploymentTx.data as `0x${string}`,
  chain: abstract,
});

After deployment, verify:

const kit = await protocolKit.connect({ safeAddress });
await kit.isSafeDeployed(); // true
await kit.getOwners();      // ["0xOwner1...", "0xOwner2...", "0xOwner3..."]
await kit.getThreshold();   // 2

Quick Start (SDK — Execute a Multi-sig Transaction)

import Safe from "@safe-global/protocol-kit";
import { MetaTransactionData, OperationType } from "@safe-global/types-kit";

const kitOwner1 = await Safe.init({
  provider: "https://api.mainnet.abs.xyz",
  signer: OWNER_1_PRIVATE_KEY,
  safeAddress: SAFE_ADDRESS,
});

const txData: MetaTransactionData = {
  to: "0xRecipientAddress",
  value: "1000000000000000", // 0.001 ETH in wei
  data: "0x",
  operation: OperationType.Call,
};

const safeTx = await kitOwner1.createTransaction({ transactions: [txData] });
const signedTx = await kitOwner1.signTransaction(safeTx);

// Owner 2 signs
const kitOwner2 = await Safe.init({
  provider: "https://api.mainnet.abs.xyz",
  signer: OWNER_2_PRIVATE_KEY,
  safeAddress: SAFE_ADDRESS,
});

const fullySignedTx = await kitOwner2.signTransaction(signedTx);

// Any owner executes once threshold is met
const executeTxResponse = await kitOwner1.executeTransaction(fullySignedTx);

Deployed Contracts

Contract	Address (Mainnet & Testnet)
Safe	0xC35F063962328aC65cED5D4c3fC5dEf8dec68dFa
SafeL2	0x610fcA2e0279Fa1F8C00c8c2F71dF522AD469380
SafeProxyFactory	0xc329D02fd8CB2fc13aa919005aF46320794a8629
MultiSend	0x309D0B190FeCCa8e1D5D8309a16F7e3CB133E885

For the full deployed contract list, see connecting-to-abstract skill → references/deployed-contracts.md.

Decision: UI vs SDK

Scenario	Use
Manual treasury management	UI — safe.abs.xyz
Programmatic Safe creation	SDK — Protocol Kit
Automated multi-sig flows	SDK — Protocol Kit
Off-chain signature collection (proposal service)	UI — see Transaction Service caveat below
Batch transactions (multiple calls in one)	SDK — MultiSend via Protocol Kit

Transaction Service Caveat

Abstract is not listed in Safe's official Transaction Service supported networks. The off-chain proposal flow (where owners sign asynchronously via the API Kit / SafeApiKit) may not work with the standard Safe infrastructure for Abstract.

Workarounds:

• Use safe.abs.xyz for off-chain signature collection (it runs its own backend)
• Use the Protocol Kit for fully onchain signing — pass the transaction object between signers in your own application
• For automated pipelines, coordinate signatures offchain (e.g., via a database or messaging) and submit the fully-signed transaction onchain

Gotchas

• Abstract is a ZK Stack chain — Safe contracts on Abstract are the same Safe codebase, but the underlying VM differs from standard EVM. The Protocol Kit handles this transparently.
• SafeL2 is the recommended singleton — on L2 chains, use the SafeL2 contract (not Safe) for lower gas costs via event-based indexing
• Transaction Service ≠ Protocol Kit — the Protocol Kit works fully onchain and is chain-agnostic. The Transaction Service (API Kit) requires a supported backend endpoint.
• Gas sponsorship — Safe transactions on Abstract can be sponsored via a paymaster. See abstract-global-wallet skill for paymaster patterns.
• Never store private keys in client code — use cast wallet import, environment variables, or KMS for signer keys

Feature Reference

Topic	Where to look
Protocol Kit detailed API	references/protocol-kit.md
Abstract network config (RPC, chain IDs)	connecting-to-abstract skill
All deployed contracts on Abstract	connecting-to-abstract skill → references/deployed-contracts.md
Safe official docs	docs.safe.global
Safe UI on Abstract	safe.abs.xyz