Fix SIWX payload format: CAIP-2 chainId, eip191 type, add statement

The server expects chainId as CAIP-2 string ("eip155:84532"), type as
"eip191" (the signing scheme), and statement in the payload JSON so it
can reconstruct the SIWE message for signature verification.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: MajorTal

cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "run402",
-  "version": "1.12.1",
+  "version": "1.12.2",
   "description": "CLI for Run402 — provision Postgres databases, deploy static sites, generate images, and manage wallets via x402 micropayments.",
   "type": "module",
   "bin": {

core/src/allowance-auth.test.ts

@@ -105,8 +105,9 @@ describe("getAllowanceAuthHeaders", () => {
     assert.equal(decoded.address, TEST_ADDRESS);
     assert.equal(decoded.uri, "https://api.run402.com/projects/v1");
     assert.equal(decoded.version, "1");
-    assert.equal(decoded.chainId, 84532);
-    assert.equal(decoded.type, "eip4361");
+    assert.equal(decoded.statement, "Sign in to Run402");
+    assert.equal(decoded.chainId, "eip155:84532");
+    assert.equal(decoded.type, "eip191");
     assert.ok(decoded.nonce);
     assert.ok(decoded.issuedAt);
     assert.ok(decoded.expirationTime);

core/src/allowance-auth.ts

@@ -142,10 +142,11 @@ export function getAllowanceAuthHeaders(path: string, allowancePath?: string): S
   const payload = {
     domain,
     address: toChecksumAddress(allowance.address),
+    statement: "Sign in to Run402",
     uri,
     version: "1",
-    chainId: 84532,
-    type: "eip4361",
+    chainId: "eip155:84532",
+    type: "eip191",
     nonce,
     issuedAt,
     expirationTime,

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "run402-mcp",
-  "version": "1.12.1",
+  "version": "1.12.2",
   "description": "MCP server for Run402 — AI-native Postgres databases with REST API, auth, storage, and row-level security. Pay with x402 USDC micropayments.",
   "type": "module",
   "main": "dist/index.js",