Base Task Signing Tool

Quick Start

Install dependencies

npm ci

Run the server

npm run dev
# or
yarn dev
# or
pnpm dev
# or
bun dev

Open http://localhost:3000 with your browser to see the result.

Task Repository Integration

To use this tool in a task repository like contract-deployments, clone this repo into the root of the task repo.

git clone https://github.com/base/task-signing-tool.git

Expected Directory Layout

Place this repository at the root of your task repository. Network folders (e.g., mainnet, sepolia) must live alongside it, and each task must be a date-prefixed folder inside a network folder.

contract-deployments/             # your task repo root (example)
├─ task-signing-tool/             # this repo cloned here
│  ├─ src/
│  └─ ...
├─ mainnet/                       # network directory
│  ├─ 2025-06-04-upgrade-foo/     # task directory (YYYY-MM-DD-task-name)
│  │  ├─ README.md                # optional, used for status parsing
│  │  ├─ validations/
│  │  │  ├─ base-sc.json          # config for "Base SC" user type
│  │  │  ├─ coinbase.json         # config for "Coinbase" user type
│  │  │  └─ op.json               # config for "OP" user type
│  │  └─ foundry-project/         # directory where you run Foundry scripts
│  │     └─ ...
│  ├─ 2025-07-12-upgrade-bar/
│  │  └─ ...
│  └─ signatures/                 # signatures directory (separate from tasks)
│     ├─ 2025-06-04-upgrade-foo/  # matches task directory name
│     │  ├─ creator-signature.json
│     │  ├─ base-facilitator-signature.json
│     │  └─ base-sc-facilitator-signature.json
│     └─ 2025-07-12-upgrade-bar/
│        └─ ...
└─ sepolia/
   ├─ 2025-05-10-upgrade-baz/
   │  └─ ...
   └─ signatures/
      └─ 2025-05-10-upgrade-baz/
         └─ ...

Key requirements and notes:

Networks: Supported networks are listed in src/lib/constants.ts and currently include mainnet and sepolia.
Task folder naming: Task directories must begin with a date prefix, YYYY-MM-DD-, for example 2025-06-04-upgrade-foo. The UI lists only folders matching that pattern.
Validation configs: For each task, place config files under validations/ named by user type in kebab-case plus .json:
- "Base SC" → base-sc.json
- "Coinbase" → coinbase.json
- "OP" → op.json
Task origin signatures: By default, tasks require three signature files stored in <network>/signatures/<task-name>/: creator-signature.json, base-facilitator-signature.json, and base-sc-facilitator-signature.json. Signatures are stored separately from task directories to avoid changing the tarball content. Use the genTaskOriginSig.ts script to generate these. Set skipTaskOriginValidation: true in the validation config to opt out.
Script execution: The tool executes Foundry from the task directory root (<network>/<task>/). Ensure your Foundry project or script context is available under that path; the tool will run the cmd specified in your validation config. Temporary outputs like temp-script-output.txt will be written there.
Optional README parsing: If <network>/<task>/README.md exists, the tool may parse it to display status and execution links.

Task README structure

When present, each task's README.md is parsed to populate the UI. Place it at <network>/<YYYY-MM-DD-slug>/README.md and follow these rules:

Status line (required for status display): Include a line containing Status: within the first 20 lines. Recognized values are PENDING, READY TO SIGN, and EXECUTED (case-insensitive). If EXECUTED is not present and READY TO SIGN is not present, the status is treated as PENDING. Supported formats:
- Single-line with link (any one of these):
  - Status: EXECUTED (https://explorer/tx/0x...)
  - Status: [EXECUTED](https://explorer/tx/0x...)
  - Status: EXECUTED https://explorer/tx/0x...
- Multi-line links (up to 5 lines after the status line):
  - First line: Status: EXECUTED
  - Next lines: Label: https://... (e.g., Transaction: https://..., Proposal: https://...)
Description (optional but recommended): Add a ## Description section. The first paragraph after this header is shown in the UI and should be concise (aim for ≤150 chars). Formatting like bold, italics, and inline code is stripped.
Title (optional): You may start with a # title. It is ignored for parsing the description fallback, but is fine for readability.
Task name display: The UI derives the display name from the folder slug after the date (e.g., 2025-06-04-upgrade-system-config → Upgrade System Config). Choose meaningful slugs.

Examples

Minimal pending task:

# Upgrade System Config

Status: PENDING

## Description

Upgrade System Config to enable feature flags for new modules.

Ready to sign:

# Upgrade System Config

Status: READY TO SIGN

## Description

Multisig proposal prepared; awaiting signatures from designated signers.

Executed with single-line link:

# Upgrade System Config

Status: EXECUTED (https://explorer/tx/0xabc123)

## Description

Executed upgrade to System Config with no parameter changes to gas config.

Executed with multiple labeled links:

# Upgrade System Config

Status: EXECUTED
Transaction: https://explorer/tx/0xabc123
Proposal: https://snapshot.org/#/proposal/0xdef456

## Description

Executed upgrade; links include both onchain transaction and governance proposal.

Validation file structure

Validation configs live under each task directory at <network>/<YYYY-MM-DD-slug>/validations/ and are selected by user type:

base-sc.json for Base SC
coinbase.json for Coinbase
op.json for OP

These files must be valid JSON and conform to the schema enforced by the app. Required fields and constraints:

cmd (string): The full forge command to execute (e.g., forge script script/Test.s.sol --sig 'run()' --sender 0xabc...).
ledgerId (number): Non‑negative integer Ledger account index.
rpcUrl (string): HTTPS RPC endpoint to use for simulation.
expectedDomainAndMessageHashes (object):
- address (0x40 hex string)
- domainHash (0x64 hex string)
- messageHash (0x64 hex string)
stateOverrides (array): Each entry:
- name (string)
- address (0x40 hex string)
- overrides (array of objects): each with key (0x64), value (0x64), description (string)
stateChanges (array): Each entry:
- name (string)
- address (0x40 hex string)
- changes (array of objects): each with key (0x64), before (0x64), after (0x64), description (string)
balanceChanges (array, optional): Each entry:
- name (string)
- address (0x40 hex string)
- field (string)
- before (0x64 hex string)
- after (0x64 hex string)
- description (string)
- allowDifference (boolean)
skipTaskOriginValidation (boolean, optional): Set to true to opt out of task origin signature validation. If omitted or false, task origin validation is enabled and signatures are required.
taskOriginConfig (object, optional but required if task origin validation is enabled):
- taskCreator (object):
  - commonName (string): The email address of the task signer/creator (extracted from their certificate's Subject Alternative Name).

Notes:

Sorting is not required; the tool sorts by address and storage slot for comparison.
The tool reads rpcUrl and ledgerId directly from this file.
When task origin validation is enabled, three signature files must exist in <network>/signatures/<task-name>/ (see Task Origin Signing below).

Minimal example (validations/base-sc.json):

{
  "cmd": "forge script script/Upgrade.s.sol --sig 'run()' --sender 0x1234567890123456789012345678901234567890",
  "ledgerId": 0,
  "rpcUrl": "https://mainnet.example.com",
  "expectedDomainAndMessageHashes": {
    "address": "0x9C4a57Feb77e294Fd7BF5EBE9AB01CAA0a90A110",
    "domainHash": "0x88aac3dc27cc1618ec43a87b3df21482acd24d172027ba3fbb5a5e625d895a0b",
    "messageHash": "0x9ef8cce91c002602265fd0d330b1295dc002966e87cd9dc90e2a76efef2517dc"
  },
  "stateOverrides": [
    {
      "name": "Base Multisig",
      "address": "0x9855054731540A48b28990B63DcF4f33d8AE46A1",
      "overrides": [
        {
          "key": "0x0000000000000000000000000000000000000000000000000000000000000004",
          "value": "0x0000000000000000000000000000000000000000000000000000000000000001",
          "description": "Lower threshold for simulation"
        }
      ]
    }
  ],
  "stateChanges": [
    {
      "name": "System Config",
      "address": "0x73a79Fab69143498Ed3712e519A88a918e1f4072",
      "changes": [
        {
          "key": "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc",
          "before": "0x000000000000000000000000340f923e5c7cbb2171146f64169ec9d5a9ffe647",
          "after": "0x00000000000000000000000078ffe9209dff6fe1c9b6f3efdf996bee60346d0e",
          "description": "Update implementation address"
        }
      ]
    }
  ],
  "taskOriginConfig": {
    "taskCreator": {
      "commonName": "alice@example.com"
    }
  }
}

Generate a validation file from a Foundry run

Use scripts/genValidationFile.ts to transform a Foundry run (which emits a stateDiff.json file in your task directory) into the validation JSON the app consumes.

Requirements:

Foundry installed (forge on PATH)
RPC URL for the target L1 network
Your Foundry script must write stateDiff.json into the provided --workdir

Flags:

--rpc-url, -r: HTTPS RPC URL. Used to resolve chainId for decoding
--workdir, -w: Directory where stateDiff.json is produced and where the forge command will run
--forge-cmd, -f: Full forge command to execute (quoted as a single string)
--ledger-id, -l (optional): Ledger account index to use in the validation JSON (defaults to 0)
--out, -o (optional): Output file for the resulting JSON (defaults to stdout)
--estimate-l2-gas (optional): Enable L2 gas estimation (only use for depositTransaction calls)
--l2-rpc-url <url> (optional): L2 RPC URL for gas estimation (required when using --estimate-l2-gas)
--l2-gas-buffer <percent> (optional): Buffer percentage to add to estimated L2 gas (defaults to 20, range: 0-100)
--help, -h: Show help

General usage (tsx):

# From the task-signing-tool repo root
npm ci
npx tsx scripts/genValidationFile.ts \
  --rpc-url https://mainnet.example \
  --workdir <network>/<YYYY-MM-DD-task> \
  --forge-cmd "forge script <path>:<Contract> --sig 'run()' --sender 0xabc..." \
  --out <network>/<YYYY-MM-DD-task>/validations/<user-type>.json

Alternative (bun):

# From the task-signing-tool repo root
npm ci
bun run scripts/genValidationFile.ts \
  --rpc-url https://mainnet.example \
  --workdir <network>/<YYYY-MM-DD-task> \
  --forge-cmd "forge script <path>:<Contract> --sig 'run()' --sender 0xabc..." \
  --out <network>/<YYYY-MM-DD-task>/validations/<user-type>.json

Example from a Makefile (variables expanded in your environment):

cd "$SIGNER_TOOL_PATH" && \
  npm ci && \
  bun run scripts/genValidationFile.ts --rpc-url "$L1_RPC_URL" \
    --workdir .. \
    --forge-cmd 'forge script --rpc-url "$L1_RPC_URL" SwapOwner --sig "sign()" --sender "$SENDER"' \
    --out ../validations/test.json

Notes:

Quote the entire --forge-cmd so that inner quotes for --sig are preserved by your shell. On macOS/Linux, prefer single quotes around the whole command and double quotes inside for signatures/addresses.
--workdir typically points to the task directory (e.g., mainnet/2025-06-04-upgrade-foo). If you keep this repo inside the task repo root, .. will refer to the task directory when running from task-signing-tool/.
If --out is omitted, the JSON is printed to stdout.

Task Origin Signing

Use scripts/genTaskOriginSig.ts to sign task folders for origin validation. Task origin validation ensures that tasks are signed by authorized parties before execution.

Signature files

When task origin validation is enabled, three signature files must exist in <network>/signatures/<task-name>/:

Task Creator: creator-signature.json — common name is the email of the task author (e.g., alice@example.com)
Base Facilitator: base-facilitator-signature.json — common name is base-facilitators (group)
Security Council Facilitator: base-sc-facilitator-signature.json — common name is base-sc-facilitators (group)

The common name is extracted from the signer's X.509 certificate Subject Alternative Name (SAN). For task creators, this is their email address. For facilitators, it is the group name they belong to.

Signatures are stored separately from task directories to ensure the tarball content remains unchanged after signing.

Requirements

ottr-cli installed and available on PATH for signing

Commands

The script supports four commands:

sign: Generate a signature for a task
verify: Verify a single signature
verify-all: Verify all three signatures (creator + both facilitators)
tar: Create a deterministic tarball from a task folder (for debugging and testing)

Flags

--task-folder, -t: Required. Path to the task folder to sign/verify
--signature-path, -p: Directory to store/read signatures (defaults to task folder)
--facilitator, -f: Facilitator type: base or security-council. Omit to sign/verify as task creator
--common-name, -c: Common name for verification (required for task creator verification)
--help, -h: Show help message

Run --help for the full usage guide:

npm ci
npx tsx scripts/genTaskOriginSig.ts --help

Usage examples

Sign as task creator:

npm ci
npx tsx scripts/genTaskOriginSig.ts sign \
  --task-folder <path>/<network>/<task> \
  --signature-path <path>/<network>/signatures/<task>

Sign as Base facilitator:

npm ci
npx tsx scripts/genTaskOriginSig.ts sign \
  --task-folder <path>/<network>/<task> \
  --signature-path <path>/<network>/signatures/<task> \
  --facilitator base

Verify task creator signature:

npm ci
npx tsx scripts/genTaskOriginSig.ts verify \
  --task-folder <path>/<network>/<task> \
  --signature-path <path>/<network>/signatures/<task> \
  --common-name alice@example.com

Opting out of task origin validation

To disable task origin validation for a specific task, set skipTaskOriginValidation: true in the validation config file:

{
  "cmd": "forge script script/Upgrade.s.sol --sig 'run()' --sender 0xabc...",
  "ledgerId": 0,
  "rpcUrl": "https://mainnet.example.com",
  "skipTaskOriginValidation": true,
  "expectedDomainAndMessageHashes": { ... },
  "stateOverrides": [ ... ],
  "stateChanges": [ ... ]
}

L2 Gas Estimation for Deposit Transactions

For tasks that involve deposit transactions to L2, you can optionally estimate the L2 gas required by enabling the --estimate-l2-gas flag.

How It Works

When you enable --estimate-l2-gas:

The tool parses the forge simulation output for the TransactionDeposited event
Extracts L2 transaction details from the event's opaqueData field (target, value, gasLimit, data)
Uses viem's estimateGas to estimate L2 gas via RPC call
Adds a configurable buffer (default 20%)
The estimated gas is included in the validation JSON

Important:

Only use this flag when your transaction emits a TransactionDeposited event (typically from calling depositTransaction on OptimismPortal)
The tool automatically adds -vvvv to the forge command to capture event output

Usage Example

npx tsx scripts/genValidationFile.ts \
  --rpc-url https://mainnet.example \
  --workdir mainnet/2025-06-04-my-l2-deposit \
  --forge-cmd "forge script script/MyDeposit.s.sol:MyDeposit --sig 'run()' --sender 0xabc --json" \
  --estimate-l2-gas \
  --l2-rpc-url https://base-mainnet.example \
  --l2-gas-buffer 25 \
  --out validations/base-sc.json

Validation File Output

When L2 gas estimation is enabled, the validation file will include:

{
  "taskName": "...",
  "...": "...",
  "l2GasEstimation": {
    "estimatedGas": "123456",
    "buffer": 25,
    "recommendedGasLimit": "154320"
  }
}

The recommendedGasLimit is calculated as: estimatedGas * (100 + buffer) / 100

Name		Name	Last commit message	Last commit date
Latest commit History 177 Commits
__tests__		__tests__
public		public
scripts		scripts
src		src
.gitignore		.gitignore
.prettierignore		.prettierignore
.prettierrc		.prettierrc
DEPENDENCY-OVERRIDES.md		DEPENDENCY-OVERRIDES.md
README.md		README.md
eslint.config.mjs		eslint.config.mjs
jest.config.js		jest.config.js
middleware.ts		middleware.ts
next-env.d.ts		next-env.d.ts
next.config.ts		next.config.ts
package-lock.json		package-lock.json
package.json		package.json
postcss.config.mjs		postcss.config.mjs
tsconfig.json		tsconfig.json

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Repository files navigation

Base Task Signing Tool

Quick Start

Task Repository Integration

Expected Directory Layout

Task README structure

Validation file structure

Generate a validation file from a Foundry run

Task Origin Signing

Signature files

Requirements

Commands

Flags

Usage examples

Opting out of task origin validation

L2 Gas Estimation for Deposit Transactions

How It Works

Usage Example

Validation File Output

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Base Task Signing Tool

Quick Start

Task Repository Integration

Expected Directory Layout

Task README structure

Validation file structure

Generate a validation file from a Foundry run

Task Origin Signing

Signature files

Requirements

Commands

Flags

Usage examples

Opting out of task origin validation

L2 Gas Estimation for Deposit Transactions

How It Works

Usage Example

Validation File Output

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