fix: fetching finalized block for extensions via external clients (#725)

sinzii · web-flow · commit aec6128dfec3 · 2025-12-09T10:41:50.000+07:00
diff --git a/packages/api/src/extrinsic/extensions/known/CheckMortality.ts b/packages/api/src/extrinsic/extensions/known/CheckMortality.ts
@@ -43,9 +43,8 @@ export class CheckMortality extends SignedExtension<EraLike, Hash> {
   }
 
   async #getSigningHeaderRpcV2(): Promise<SigningHeader> {
-    const api = this.client as V2Client;
     // TODO similar to the legacy, we should account for the case finality is lagging behind
-    const finalizedBlock = await api.chainHead.finalizedBlock();
+    const finalizedBlock = await this.client.block.finalized();
 
     return {
       hash: finalizedBlock.hash,

Original file line number	Diff line number	Diff line change
`@@ -43,9 +43,8 @@ export class CheckMortality extends SignedExtension<EraLike, Hash> {`
`43`	`43`	`}`
`44`	`44`
`45`	`45`	`async #getSigningHeaderRpcV2(): Promise<SigningHeader> {`
`46`		`- const api = this.client as V2Client;`
`47`	`46`	`// TODO similar to the legacy, we should account for the case finality is lagging behind`
`48`		`- const finalizedBlock = await api.chainHead.finalizedBlock();`
	`47`	`+ const finalizedBlock = await this.client.block.finalized();`
`49`	`48`
`50`	`49`	`return {`
`51`	`50`	`hash: finalizedBlock.hash,`