xrpl mcp

import { Client, Wallet } from "xrpl"; import { DID_PREFIX } from "./constants.js"; // Helper function to create DID document for an account export function createDIDDocument( address: string, publicKey: string, network: string ) { const did = `${DID_PREFIX}${network}:${address}`; return { "@context": "https://www.w3.org/ns/did/v1", id: did, controller: did, verificationMethod: [ { id: `${did}#keys-1`, type: "Ed25519VerificationKey2018", controller: did, publicKeyHex: publicKey, }, ], authentication: [`${did}#keys-1`], created: new Date().toISOString(), updated: new Date().toISOString(), }; } // Helper function to store DID document in account's memos export async function storeDIDDocument( client: Client, wallet: Wallet, didDocument: any ) { // Convert DID document to stringified JSON const didDocumentStr = JSON.stringify(didDocument); // Create a self-transaction to store the DID document in account memos const tx: any = { TransactionType: "AccountSet", Account: wallet.address, Memos: [ { Memo: { MemoType: Buffer.from("did:document") .toString("hex") .toUpperCase(), MemoData: Buffer.from(didDocumentStr) .toString("hex") .toUpperCase(), }, }, ], }; const prepared = await client.autofill(tx); const signed = wallet.sign(prepared); return await client.submitAndWait(signed.tx_blob); } // Helper function to retrieve DID document from account transactions export async function retrieveDIDDocument(client: Client, address: string) { // Get account transactions const transactions = await client.request({ command: "account_tx", account: address, ledger_index_min: -1, ledger_index_max: -1, binary: false, limit: 100, forward: false, }); // Look for the most recent transaction with a DID document memo for (const tx of transactions.result.transactions) { // Use a more specific type for the transaction object const transaction = tx.tx as unknown as { Memos?: Array<{ Memo: { MemoType: string; MemoData: string; }; }>; }; if (transaction && transaction.Memos) { for (const memo of transaction.Memos) { const memoType = memo.Memo.MemoType; const memoData = memo.Memo.MemoData; if ( Buffer.from(memoType, "hex").toString() === "did:document" ) { try { const didDocument = JSON.parse( Buffer.from(memoData, "hex").toString() ); return didDocument; } catch (e) { // If parsing fails, continue to the next memo continue; } } } } } return null; }