bankr-dev---arbitrary-transactions — an installable skill for AI agents, published by bankrbot/claude-plugins.
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 function
bankr-api-basics - API fundamentals
bankr-token-trading - Higher-level trading operationsdon't have the plugin yet? install it then click "run inline in claude" again.
by @bankrbot