import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js"
export function registerSignaturesPrompts(server: McpServer) {
server.prompt(
"create_gasless_approval",
"Help create a gasless token approval using EIP-2612 permit",
{
tokenAddress: { description: "Token contract address", required: true },
spender: { description: "Address to approve", required: true },
amount: { description: "Amount to approve", required: true }
},
({ tokenAddress, spender, amount }) => ({
messages: [
{
role: "user" as const,
content: {
type: "text" as const,
text: `Help me create a gasless approval for ${amount} of token ${tokenAddress} to spender ${spender}.
This uses EIP-2612 permit signatures to allow approvals without gas.
I'll need:
1. Token name (for domain)
2. Current nonce from the token contract
3. Deadline timestamp
4. Chain ID
Then use create_permit_signature to generate the signature.`
}
}
]
})
)
server.prompt(
"verify_signature_authenticity",
"Verify that a signature is authentic and from the expected signer",
{
signature: { description: "Signature to verify", required: true },
message: { description: "Original message", required: true },
expectedSigner: { description: "Expected signer address", required: true }
},
({ signature, message, expectedSigner }) => ({
messages: [
{
role: "user" as const,
content: {
type: "text" as const,
text: `Verify the authenticity of this signature:
Signature: ${signature}
Message: ${message}
Expected Signer: ${expectedSigner}
Use verify_message_signature to check if:
1. The signature is valid
2. The recovered signer matches the expected address
3. Report any discrepancies`
}
}
]
})
)
}
