From 093b6d5180d466d396fcd07582a52a1a00f34a11 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Diamond?=
 <32074058+Andre-Diamond@users.noreply.github.com>
Date: Fri, 24 Apr 2026 18:05:04 +0200
Subject: [PATCH] feat: update DRep certificate handling to compute anchor data
 hash and refactor anchor URL resolution

---
 scripts/ci/scenarios/steps/certificates.ts | 14 ++++++++++----
 src/pages/api/v1/botDRepCertificate.ts     | 20 +++++---------------
 2 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/scripts/ci/scenarios/steps/certificates.ts b/scripts/ci/scenarios/steps/certificates.ts
index d308500..267fdc0 100644
--- a/scripts/ci/scenarios/steps/certificates.ts
+++ b/scripts/ci/scenarios/steps/certificates.ts
@@ -6,6 +6,7 @@ import { getDefaultBot } from "../../framework/botContext";
 import { authenticateBot } from "../../framework/botAuth";
 import { stringifyRedacted } from "../../framework/redact";
 import { boolFromEnv } from "../../framework/env";
+import { hashDrepAnchor } from "@meshsdk/core";
 
 type ScriptUtxo = {
   input: { txHash: string; outputIndex: number };
@@ -165,7 +166,7 @@ function createCertPhaseSteps(args: {
   label: string;
   runtime: { transactionId?: string; spentUtxoRefs?: { txHash: string; outputIndex: number }[] };
   requireBroadcastSuccess: boolean;
-  buildExtraBody?: (ctx: CIBootstrapContext) => Record<string, unknown>;
+  buildExtraBody?: (ctx: CIBootstrapContext) => Promise<Record<string, unknown>> | Record<string, unknown>;
   /** When true, each signing step uses the stake-cert flow (payment + stake witnesses). */
   useStakeCertFlow?: boolean;
 }): RouteStep[] {
@@ -192,13 +193,14 @@ function createCertPhaseSteps(args: {
           fresh: true,
         });
 
+        const extraBody = args.buildExtraBody ? await args.buildExtraBody(ctx) : {};
         const body: Record<string, unknown> = {
           walletId: wallet.walletId,
           address: bot.paymentAddress,
           action,
           utxoRefs,
           description: label,
-          ...(args.buildExtraBody?.(ctx) ?? {}),
+          ...extraBody,
         };
 
         const response = await requestJson<{ id?: string; error?: string }>({
@@ -504,12 +506,16 @@ export function createScenarioDRepCertificates(): Scenario {
   const sdkReg: { transactionId?: string; spentUtxoRefs?: { txHash: string; outputIndex: number }[] } = {};
   const sdkRetire: { transactionId?: string; spentUtxoRefs?: { txHash: string; outputIndex: number }[] } = {};
 
-  function buildDRepRegBody(): Record<string, unknown> {
+  async function buildDRepRegBody(): Promise<Record<string, unknown>> {
     const anchorUrl = process.env.CI_DREP_ANCHOR_URL?.trim();
     if (!anchorUrl) {
       throw new Error("CI_DREP_ANCHOR_URL is required for DRep registration");
     }
-    return { anchorUrl };
+    const res = await fetch(anchorUrl);
+    if (!res.ok) throw new Error(`Failed to fetch DRep anchor URL: HTTP ${res.status}`);
+    const json = await res.json() as object;
+    const anchorDataHash = hashDrepAnchor(json);
+    return { anchorUrl, anchorDataHash };
   }
 
   return {
diff --git a/src/pages/api/v1/botDRepCertificate.ts b/src/pages/api/v1/botDRepCertificate.ts
index 795d677..9eb2104 100644
--- a/src/pages/api/v1/botDRepCertificate.ts
+++ b/src/pages/api/v1/botDRepCertificate.ts
@@ -13,7 +13,6 @@ import { getTxBuilder } from "@/utils/get-tx-builder";
 import { resolveWalletScriptAddress } from "@/lib/server/walletScriptAddress";
 import { resolveUtxoRefsFromChain } from "@/lib/server/resolveUtxoRefsFromChain";
 import { createPendingMultisigTransaction } from "@/lib/server/createPendingMultisigTransaction";
-import { resolveDRepAnchorFromUrl } from "@/lib/server/resolveDRepAnchorFromUrl";
 import type { DbWalletWithLegacy } from "@/types/wallet";
 import type { Wallet as AppWallet } from "@/types/wallet";
 import type { MultisigWallet } from "@/utils/multisigSDK";
@@ -177,19 +176,10 @@ export default async function handler(
     if (!anchorUrl) {
       return res.status(400).json({ error: "anchorUrl is required for register" });
     }
-    let resolvedAnchorUrl: string;
-    let anchorDataHash: string;
-    try {
-      const r = await resolveDRepAnchorFromUrl(
-        anchorUrl,
-        typeof body.anchorDataHash === "string" ? body.anchorDataHash : undefined,
-      );
-      resolvedAnchorUrl = r.anchorUrl;
-      anchorDataHash = r.anchorDataHash;
-    } catch (e) {
-      return res.status(400).json({
-        error: e instanceof Error ? e.message : "Failed to resolve anchor",
-      });
+    const anchorDataHash =
+      typeof body.anchorDataHash === "string" ? body.anchorDataHash.trim() : "";
+    if (!anchorDataHash) {
+      return res.status(400).json({ error: "anchorDataHash is required for register — compute it from the anchor JSON before calling this endpoint" });
     }
 
     for (const utxo of utxos) {
@@ -204,7 +194,7 @@ export default async function handler(
 
     txBuilder
       .drepRegistrationCertificate(dRepId, {
-        anchorUrl: resolvedAnchorUrl,
+        anchorUrl,
         anchorDataHash,
       })
       .certificateScript(drepCbor)