Ethereum & EVM blockchain CLI skill — sign messages, send tokens, swap via 1inch Fusion, check balances, broadcast transactions, and manage wallets across Ethereum and BNB Smart Chain.
Install with the open skills CLI (global, non-interactive — available in every Claude Code session):
npx skills add LeoYeAI/openclaw-master-skills --skill "chainai" -g -a claude-code -yOr manually — clone and copy the skill directory (SKILL.md + companion files):
git clone --depth 1 https://github.com/LeoYeAI/openclaw-master-skills /tmp/openclaw-master-skills && cp -r /tmp/openclaw-master-skills/skills/chainai ~/.claude/skills/chainaiThis skill is a directory: SKILL.md is the entry point; the files below ship with it.
---
name: chainai
description: 'Ethereum & EVM blockchain CLI skill — sign messages, send tokens, swap via 1inch Fusion, check balances, broadcast transactions, and manage wallets across Ethereum and BNB Smart Chain.'
metadata:
author: kvhnuke
version: 0.0.10
openclaw:
requires:
env:
- CHAINAI_PRIVATE_KEY
bins:
- npx
- node
primaryEnv: CHAINAI_PRIVATE_KEY
emoji: '⧫'
homepage: https://github.com/kvhnuke/chainai
install:
- kind: node
package: chainai
bins: [chainai]
---
# chainai — Ethereum Transactions Skill
> **⚠️ DISCLAIMER — USE AT YOUR OWN RISK**
>
> This tool interacts with real blockchain networks and real funds. The author(s) of this tool are **not responsible for any loss of funds**, damages, or unintended consequences arising from its use. By using this skill, you accept full responsibility for all operations performed.
> **🔒 MANDATORY SECURITY REQUIREMENTS FOR ALL AGENTS**
>
> Agents **MUST** take every possible action to safeguard `CHAINAI_PRIVATE_KEY` and all other private keys from exposure. Specifically:
>
> 1. **NEVER log, print, echo, or display private keys** in any user-facing output, logs, chat messages, or debug traces.
> 2. **NEVER store private keys** in plain text files, version control, or any persistent storage that is not explicitly encrypted and access-controlled.
> 3. **NEVER transmit private keys** over unencrypted channels or include them in URLs, query parameters, or request bodies to third-party services.
> 4. **NEVER include private keys** in error messages, stack traces, or diagnostic output.
> 5. **ALWAYS prefer the `CHAINAI_PRIVATE_KEY` environment variable** over the `-k` flag to minimize key exposure in shell history and process listings.
> 6. **ALWAYS treat private keys as the highest-sensitivity secret.** A leaked private key grants full, irrevocable control over all funds in the associated wallet.
> **� ADDRESS FORMATTING RULES**
>
> 1. **Always use ERC-55 checksum addresses** when passing addresses to any command (wallet addresses, token contract addresses, recipient addresses, etc.).
> 2. **If you do not know the correct checksum**, use **all lowercase** addresses (e.g. `0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2` instead of guessing the mixed-case checksum).
> 3. **Never guess a token contract address.** If you are unsure of the correct token contract address, **always ask the user** to provide it. Do not fabricate or assume token addresses.
> **�🚀 BEFORE YOU BEGIN**
>
> 1. **Verify your private key is set**: Run `npx chainai@0.0.10 who-am-i` to confirm `CHAINAI_PRIVATE_KEY` is properly configured and resolves to the expected address before proceeding with any other command.
> 2. **No private key?** Use `npx chainai@0.0.10 gen-wallet` to generate a new wallet. Save the returned private key securely (e.g. as an environment variable) — it will not be shown again.
> 3. **Fund your account**: You must deposit the necessary funds (native tokens for gas + any tokens you intend to send or swap) to the wallet address before using `send`, `swap`, or any transaction-submitting command. Commands will fail if the account has insufficient balance.
## Overview
`chainai` is a non-interactive CLI tool for Ethereum and EVM-compatible blockchain operations. It handles signing, sending, broadcasting transactions, token swaps (1inch Fusion), balance queries, and wallet generation.
## Invocation
```
npx chainai@0.0.10 <command> [options]
```
- **Runtime**: Node.js (>=18)
- **Non-interactive**: All parameters must be passed as arguments or flags. Never prompts for input.
## Authentication
Most commands accept a private key via:
- `-k, --private-key <key>` flag (hex string starting with `0x`)
- `CHAINAI_PRIVATE_KEY` environment variable (fallback when `-k` is not provided)
## Supported Networks
| Name | Chain ID | Aliases | Native Token |
| --------------- | -------- | ---------------------------- | ------------ |
| Ethereum | 1 | `mainnet`, `ethereum`, `eth` | ETH |
| BNB Smart Chain | 56 | `bsc`, `binance`, `bnb` | BNB |
Use `-n, --network` to specify a network by name, alias, or chain ID. Defaults to `mainnet`.
## Exit Codes
| Code | Meaning |
| ---- | ------------------------------------------------------------------ |
| `0` | Operation completed successfully. |
| `1` | Operation failed. Inspect `stderr` for a structured error message. |
## Message Contract
### Success (stdout)
```
CHAINAI_OK: <description>
{ ... }
```
### Errors (stderr)
```
CHAINAI_ERR: <ERROR_CODE> — <description>
```
| Error Code | Description | Agent Action |
| ------------------ | ----------------------------------------------------------------------- | ---------------------------------------------------- |
| `INVALID_INPUT` | Malformed or missing required fields. | Re-validate input parameters and retry. |
| `EXECUTION_FAILED` | Operation could not be completed. Description contains failure details. | Inspect description and adjust approach. |
| `TIMEOUT` | Operation exceeded the allowed time limit. | Retry with a longer timeout or simplify the request. |
| `UNKNOWN` | Unexpected error. | Report to orchestrator for manual inspection. |
## Retry Strategy
For `TIMEOUT` and `EXECUTION_FAILED` errors, retry up to 2 times with exponential backoff before escalating.
---
## Commands
### `gen-wallet`
Generate a new random wallet (private key and address).
```bash
npx chainai@0.0.10 gen-wallet
```
**Options**: None.
**Output (stdout)**:
```json
{
"address": "0x...",
"privateKey": "0x..."
}
```
Usage instructions are printed to `stderr`.
---
### `who-am-i`
Return the Ethereum address derived from a private key.
```bash
npx chainai@0.0.10 who-am-i -k 0xKEY
# or
CHAINAI_PRIVATE_KEY=0xKEY npx chainai@0.0.10 who-am-i
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ------------------------------------------------- |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
**Output (stdout)**:
```json
{
"address": "0x..."
}
```
---
### `sign-message`
Sign a message using EIP-191 personal sign.
```bash
npx chainai@0.0.10 sign-message -k 0xKEY -m "Hello World"
npx chainai@0.0.10 sign-message -k 0xKEY -m 0x68656c6c6f --raw
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ------------------------------------------------- |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
| `-m, --message <message>` | Yes | The message to sign. |
| `-r, --raw` | No | Treat message as raw hex data (`0x`-prefixed). |
**Output (stdout)**:
```json
{
"address": "0x...",
"message": "<original message>",
"signature": "0x..."
}
```
---
### `sign`
> **⚠️ CRITICAL SECURITY WARNING**: Signs a raw hash (secp256k1) without any prefix. The resulting signature can authorize any on-chain action. **Use `sign-message` instead unless raw hash signing is explicitly required.** Before using, verify the hash is legitimate and no safer alternative exists.
```bash
npx chainai@0.0.10 sign -k 0xKEY -h 0xHASH
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ------------------------------------------------- |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
| `-h, --hash <hash>` | Yes | The hash to sign (`0x`-prefixed hex string). |
**Output (stdout)**:
```json
{
"address": "0x...",
"hash": "0x...",
"signature": "0x..."
}
```
---
### `sign-typed-data`
Sign EIP-712 typed data.
```bash
npx chainai@0.0.10 sign-typed-data -k 0xKEY -d '<json>'
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ---------------------------------------------------------------------------- |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
| `-d, --data <json>` | Yes | EIP-712 typed data as JSON with `domain`, `types`, `primaryType`, `message`. |
**Data Format**:
```json
{
"domain": {
"name": "AppName",
"version": "1",
"chainId": 1,
"verifyingContract": "0x..."
},
"types": { "TypeName": [{ "name": "fieldName", "type": "fieldType" }] },
"primaryType": "TypeName",
"message": { "fieldName": "value" }
}
```
**Output (stdout)**:
```json
{
"address": "0x...",
"signature": "0x..."
}
```
---
### `sign-transaction`
Sign a transaction (legacy, EIP-2930, or EIP-1559). Returns a serialized signed transaction ready to broadcast.
```bash
npx chainai@0.0.10 sign-transaction -k 0xKEY -t '<json>'
```
**Options**:
| Flag | Required | Description |
| -------------------------- | -------- | ------------------------------------------------- |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
| `-t, --transaction <json>` | Yes | Transaction object as JSON string. |
**Transaction Formats**:
Legacy:
```json
{
"to": "0x...",
"value": "1000000000000000000",
"gasPrice": "20000000000",
"gas": "21000",
"nonce": 0,
"chainId": 1
}
```
EIP-1559:
```json
{
"to": "0x...",
"value": "1000000000000000000",
"maxFeePerGas": "30000000000",
"maxPriorityFeePerGas": "1000000000",
"gas": "21000",
"nonce": 0,
"chainId": 1
}
```
Omit `to` for contract deployment. Numeric values can be strings or numbers.
**Output (stdout)**:
```json
{
"address": "0x...",
"serializedTransaction": "0x..."
}
```
---
### `get-balance`
Get native or ERC-20 token balances.
```bash
npx chainai@0.0.10 get-balance -a 0xADDRESS
npx chainai@0.0.10 get-balance -a 0xADDRESS -n bsc
npx chainai@0.0.10 get-balance -a 0xADDRESS -t 0xTOKEN_CONTRACT
npx chainai@0.0.10 get-balance -a 0xADDRESS --all
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | --------------------------------------------------------------------------------------- |
| `-a, --address <address>` | No | Wallet address. Falls back to address derived from `CHAINAI_PRIVATE_KEY`. |
| `-n, --network <network>` | No | Network (default: `mainnet`). |
| `-t, --token <token>` | No | Token contract address. Default: `0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee` (native). |
| `--all` | No | Return all token balances (native + ERC-20). `-t` is ignored when set. |
**Output (stdout)** — single token:
```json
{
"address": "0x...",
"network": "Ethereum",
"token": "ETH",
"balance": "1.5",
"rawBalance": "1500000000000000000",
"decimals": 18,
"contract": null
}
```
With `--all`, returns an array of balance objects.
---
### `send`
Build and sign a transaction to send native tokens or ERC-20 tokens. Automatically fetches nonce, gas, and fee data from the network.
```bash
npx chainai@0.0.10 send -k 0xKEY --to 0xRECIPIENT --amount 1.5 -t 0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
npx chainai@0.0.10 send -k 0xKEY --to 0xRECIPIENT --amount 100 -t 0xTOKEN_CONTRACT -n bsc
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ------------------------------------------------------------------------------------ |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
| `--to <address>` | Yes | Recipient address. |
| `-t, --token <token>` | Yes | Token contract address. Use `0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee` for native. |
| `--amount <amount>` | Yes | Amount in human-readable units (e.g. `"1.5"`). |
| `-n, --network <network>` | No | Network (default: `mainnet`). |
| `-b, --broadcast` | No | Automatically broadcast after signing. |
**Output (stdout)**:
```json
{
"from": "0x...",
"to": "0x...",
"token": "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
"amount": "1.5",
"network": "Ethereum",
"serializedTransaction": "0x..."
}
```
---
### `broadcast`
Broadcast a serialized signed transaction to the network.
```bash
npx chainai@0.0.10 broadcast -s 0xSERIALIZED_TX
npx chainai@0.0.10 broadcast -s 0xSERIALIZED_TX -n bsc
```
**Options**:
| Flag | Required | Description |
| ------------------------------------ | -------- | ---------------------------------------------- |
| `-s, --serialized-transaction <hex>` | Yes | Serialized signed transaction (`0x`-prefixed). |
| `-n, --network <network>` | No | Network (default: `mainnet`). |
**Output (stdout)**:
```json
{
"transactionHash": "0x...",
"network": "Ethereum",
"explorerUrl": "https://etherscan.io/tx/0x..."
}
```
---
### `tx-status`
Get the status of a transaction by hash.
```bash
npx chainai@0.0.10 tx-status -h 0xTX_HASH
npx chainai@0.0.10 tx-status -h 0xTX_HASH -n bsc
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ------------------------------------------- |
| `-h, --hash <hash>` | Yes | Transaction hash (`0x`-prefixed, 32 bytes). |
| `-n, --network <network>` | No | Network (default: `mainnet`). |
**Output (stdout)**:
```json
{
"transactionHash": "0x...",
"status": "success",
"network": "Ethereum",
"blockNumber": "12345678",
"from": "0x...",
"to": "0x...",
"gasUsed": "21000",
"effectiveGasPrice": "30000000000",
"explorerUrl": "https://etherscan.io/tx/0x..."
}
```
For pending transactions, `status` is `"pending"` and `blockNumber`, `from`, `to`, `gasUsed`, `effectiveGasPrice` will be `null`.
---
### `swap`
Swap tokens via 1inch Fusion. Gets a quote first, then optionally submits the order. Use `-y` to skip confirmation and submit immediately.
```bash
npx chainai@0.0.10 swap -k 0xKEY --from-token 0xFROM --to-token 0xTO --amount 1.5
npx chainai@0.0.10 swap -k 0xKEY --from-token 0xFROM --to-token 0xTO --amount 1.5 -y
npx chainai@0.0.10 swap -k 0xKEY --from-token 0xFROM --to-token 0xTO --amount 0.5 -n bsc
```
Use `0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee` for native tokens.
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ------------------------------------------------- |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
| `--from-token <address>` | Yes | Source token contract address. |
| `--to-token <address>` | Yes | Destination token contract address. |
| `--amount <amount>` | Yes | Amount in human-readable units (e.g. `"1.5"`). |
| `-n, --network <network>` | No | Network (default: `mainnet`). |
| `-y, --yes` | No | Skip confirmation prompt and submit immediately. |
**Output (stdout)** — quote:
```json
{
"from": "0x...",
"fromToken": "0x...",
"toToken": "0x...",
"amount": "1.5",
"estimatedReturn": "1500",
"estimatedReturnMin": "1400",
"estimatedReturnAvg": "1450",
"network": "Ethereum"
}
```
**Output (stdout)** — order submission:
```json
{
"from": "0x...",
"fromToken": "0x...",
"toToken": "0x...",
"amount": "1.5",
"estimatedReturn": "1500",
"estimatedReturnMin": "1400",
"estimatedReturnAvg": "1450",
"network": "Ethereum",
"orderHash": "0x...",
"approvalTxHash": "0x..."
}
```
`approvalTxHash` is non-null only when an ERC-20 token approval was required. For native token swaps or already-approved tokens, it is `null`.
---
### `swap-order-status`
Get the status of a 1inch Fusion swap order by its order hash.
```bash
npx chainai@0.0.10 swap-order-status -k 0xKEY --order-hash 0xORDER_HASH
npx chainai@0.0.10 swap-order-status -k 0xKEY --order-hash 0xORDER_HASH -n bsc
```
**Options**:
| Flag | Required | Description |
| ------------------------- | -------- | ------------------------------------------------- |
| `-k, --private-key <key>` | No | Private key. Falls back to `CHAINAI_PRIVATE_KEY`. |
| `--order-hash <hash>` | Yes | Order hash returned from the `swap` command. |
| `-n, --network <network>` | No | Network (default: `mainnet`). |
**Output (stdout)**:
```json
{
"orderHash": "0x...",
"status": "filled",
"network": "Ethereum",
"createdAt": 1700000000,
"duration": 180,
"fills": [{ "txHash": "0x..." }],
"cancelTx": null,
"finalToAmount": "1500000000"
}
```
Possible `status` values: `"pending"`, `"filled"`, `"expired"`, `"cancelled"`. For pending/cancelled orders, `finalToAmount` is `null` and `fills` is empty.
Set up and use 1Password CLI (op). Use when installing the CLI, enabling desktop app integration, signing in, and reading/injecting secrets for commands.
Operate the Antigravity CLI (agy): plugins, auth, sandbox.
Deploy a Worker live, no account, via wrangler --temporary.