bankr dev - arbitrary transactions
This skill should be used when building apps that submit raw EVM transactions, custom contract calls, or need to execute pre-built calldata through Bankr. Covers JSON format, validation, and integration patterns.
- Installs
- 370
- Last 24h
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- Security
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Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/bankrbot/claude-plugins --skill bankr-dev---arbitrary-transactions- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads bankr dev - arbitrary transactions automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Arbitrary Transaction Capability
Submit raw EVM transactions with explicit calldata via the Bankr API.
What You Can Do
| Operation | Description |
|---|---|
| Submit calldata | Execute pre-built calldata on any supported chain |
| Custom contract calls | Interact with any contract using raw function calls |
| Value transfers with data | Send ETH/MATIC while executing calldata |
JSON Schema
{
"to": "0x...",
"data": "0x...",
"value": "0",
"chainId": 8453
}
| Field | Type | Required | Description |
|---|---|---|---|
to | string | Yes | Contract address (0x + 40 hex chars) |
data | string | Yes | Calldata (0x + hex, or "0x" for empty) |
value | string | Yes | Wei amount as string |
chainId | number | Yes | Target chain (1, 137, or 8453) |
Supported Chains
| Chain | Chain ID |
|---|---|
| Ethereum | 1 |
| Polygon | 137 |
| Base | 8453 |
| Unichain | 130 |
Usage
import { execute } from "./bankr-client";
// Submit arbitrary transaction
const txJson = {
to: "0x1234567890abcdef1234567890abcdef12345678",
data: "0xa9059cbb...",
value: "0",
chainId: 8453
};
await execute(`Submit this transaction: ${JSON.stringify(txJson)}`);
Integration Pattern
import { execute } from "./bankr-client";
interface ArbitraryTx {
to: string;
data: string;
value: string;
chainId: number;
}
async function submitArbitraryTx(tx: ArbitraryTx): Promise<void> {
// Validate before submission
if (!tx.to.match(/^0x[a-fA-F0-9]{40}$/)) {
throw new Error("Invalid address format");
}
if (!tx.data.startsWith("0x")) {
throw new Error("Calldata must start with 0x");
}
if (![1, 137, 8453, 130].includes(tx.chainId)) {
throw new Error("Unsupported chain");
}
const prompt = `Submit this transaction: ${JSON.stringify(tx)}`;
await execute(prompt);
}
// Example: ERC-20 transfer
await submitArbitraryTx({
to: "0xTokenContractAddress...",
data: "0xa9059cbb000000000000000000000000...", // transfer(address,uint256)
value: "0",
chainId: 8453
});
Error Handling
try {
await submitArbitraryTx(tx);
} catch (error) {
if (error.message.includes("reverted")) {
// Transaction reverted - check calldata encoding
console.error("Transaction reverted:", error);
} else if (error.message.includes("insufficient")) {
// Not enough funds for gas + value
console.error("Insufficient funds:", error);
} else if (error.message.includes("unsupported")) {
// Chain not supported
console.error("Unsupported chain:", error);
}
}
Related Skills
bankr-client-patterns- Client setup and execute functionbankr-api-basics- API fundamentalsbankr-token-trading- Higher-level trading operations
FAQ
What does the bankr dev - arbitrary transactions skill do?
This skill should be used when building apps that submit raw EVM transactions, custom contract calls, or need to execute pre-built calldata through Bankr. Covers JSON format, validation, and integration patterns.
How do I install bankr dev - arbitrary transactions?
Run npx skills add https://github.com/bankrbot/claude-plugins --skill bankr-dev---arbitrary-transactions in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/bankr-dev---arbitrary-transactions/ (personal) or .claude/skills/bankr-dev---arbitrary-transactions/ (project).
Which AI agents can use bankr dev - arbitrary transactions?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is bankr dev - arbitrary transactions safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains bankr dev - arbitrary transactions?
It is published by bankrbot in bankrbot/claude-plugins. It has 370 recorded installs.
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