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fix: also patch @polkadot/api Init.js for pruned state

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The _getBlockRegistryViaHash method in @polkadot/api calls
getRuntimeVersion.raw(header.parentHash) which fails for genesis
and other pruned blocks. Add fallback to current runtime version.
This commit is contained in:
Kurdistan Tech Ministry
2026-02-19 02:28:40 +03:00
parent d270504c9a
commit 0130c5984a
1 changed files with 31 additions and 24 deletions
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docker/patches/pruned-state-fallback.js
+31 -24
View File
@@ -1,5 +1,5 @@
/**
* Patch @subql/node to handle pruned blockchain state.
* Patch @subql/node and @polkadot/api to handle pruned blockchain state.
*
* Problem: Substrate nodes prune historical state by default (~256 blocks).
* When SubQuery restarts and tries to fetch runtime version for old blocks,
@@ -11,44 +11,51 @@
* This is safe for chains with infrequent spec upgrades.
*/
const fs = require("fs");
let count = 0;
// --- Patch 1: base-runtime.service.js ---
// Handles getSpecFromApi() and getRuntimeVersion() which call
// --- Patch 1: @subql/node base-runtime.service.js ---
// getSpecFromApi() and getRuntimeVersion() call
// this.api.rpc.state.getRuntimeVersion(parentBlockHash)
const runtimeFile =
"/app/node_modules/@subql/node/dist/indexer/runtime/base-runtime.service.js";
let runtimeCode = fs.readFileSync(runtimeFile, "utf8");
const runtimeMatches = (
runtimeCode.match(
/await this\.api\.rpc\.state\.getRuntimeVersion\(\w+\)/g
) || []
).length;
runtimeCode = runtimeCode.replace(
/await this\.api\.rpc\.state\.getRuntimeVersion\((\w+)\)/g,
"await this.api.rpc.state.getRuntimeVersion($1).catch(() => this.api.rpc.state.getRuntimeVersion())"
(m, v) => { count++; return `await this.api.rpc.state.getRuntimeVersion(${v}).catch(() => this.api.rpc.state.getRuntimeVersion())`; }
);
fs.writeFileSync(runtimeFile, runtimeCode);
console.log(`Patched base-runtime.service.js (${runtimeMatches} call sites)`);
console.log(`[1/4] base-runtime.service.js: ${count} patches`);
// --- Patch 2: utils/substrate.js ---
// Handles fetchRuntimeVersionRange() which calls
// api.rpc.state.getRuntimeVersion(hash).catch((e) => { throw ... })
// --- Patch 2: @subql/node utils/substrate.js ---
// fetchRuntimeVersionRange() catches and rethrows; add fallback before rethrow
count = 0;
const utilsFile =
"/app/node_modules/@subql/node/dist/utils/substrate.js";
let utilsCode = fs.readFileSync(utilsFile, "utf8");
const utilsBefore = utilsCode.includes("getRuntimeVersion(hash).catch((e)");
// Insert a fallback .catch before the existing error handler:
// Original: getRuntimeVersion(hash).catch((e) => { throw... })
// Patched: getRuntimeVersion(hash).catch(() => getRuntimeVersion()).catch((e) => { throw... })
utilsCode = utilsCode.replace(
/api\.rpc\.state\.getRuntimeVersion\(hash\)\.catch\(\(e\)/g,
"api.rpc.state.getRuntimeVersion(hash).catch(() => api.rpc.state.getRuntimeVersion()).catch((e)"
() => { count++; return "api.rpc.state.getRuntimeVersion(hash).catch(() => api.rpc.state.getRuntimeVersion()).catch((e)"; }
);
fs.writeFileSync(utilsFile, utilsCode);
console.log(`Patched utils/substrate.js (had target: ${utilsBefore})`);
console.log(`[2/4] utils/substrate.js: ${count} patches`);
console.log("All pruned-state patches applied.");
// --- Patch 3: @polkadot/api Init.js ---
// _getBlockRegistryViaHash calls getRuntimeVersion.raw(header.parentHash)
// which fails when parentHash points to a pruned block (including genesis).
count = 0;
const initFile =
"/app/node_modules/@polkadot/api/cjs/base/Init.js";
let initCode = fs.readFileSync(initFile, "utf8");
initCode = initCode.replace(
/await \(0, rxjs_1\.firstValueFrom\)\(this\._rpcCore\.state\.getRuntimeVersion\.raw\(header\.parentHash\)\)/g,
() => { count++; return "await (0, rxjs_1.firstValueFrom)(this._rpcCore.state.getRuntimeVersion.raw(header.parentHash)).catch(() => (0, rxjs_1.firstValueFrom)(this._rpcCore.state.getRuntimeVersion()))"; }
);
fs.writeFileSync(initFile, initCode);
console.log(`[3/4] @polkadot/api Init.js: ${count} patches`);
// --- Patch 4: @polkadot/api events.js (system.events.at) ---
// fetchEventsRange calls api.query.system.events.at(hash) which may also fail
// for pruned blocks. Not patching this as it's a data fetch, not startup blocker.
// SubQuery will retry or skip those blocks.
console.log("[4/4] All pruned-state patches applied successfully.");