Adapted to display moonbeam author (#3108)

* adapted to display moonbeam author

* refactor and lint

* removed comments

packages/api-derive/src/type/util.ts

@@ -4,19 +4,17 @@
 import type { AccountId, Digest } from '@polkadot/types/interfaces';
 
 export function extractAuthor (digest: Digest, sessionValidators: AccountId[] = []): AccountId | undefined {
-  const [pitem] = digest.logs.filter(({ type }) => type === 'PreRuntime');
+  const [citem] = digest.logs.filter(({ type }) => type === 'Consensus');
 
-  // extract from the substrate 2.0 PreRuntime digest
-  if (pitem) {
-    const [engine, data] = pitem.asPreRuntime;
+  if (citem) {
+    const [engine, data] = citem.asConsensus;
 
     return engine.extractAuthor(data, sessionValidators);
   } else {
-    const [citem] = digest.logs.filter(({ type }) => type === 'Consensus');
+    const [pitem] = digest.logs.filter(({ type }) => type === 'PreRuntime');
 
-    // extract author from the consensus (substrate 1.0, digest)
-    if (citem) {
-      const [engine, data] = citem.asConsensus;
+    if (pitem) {
+      const [engine, data] = pitem.asPreRuntime;
 
       return engine.extractAuthor(data, sessionValidators);
     }

packages/types/src/generic/ConsensusEngineId.ts

@@ -88,6 +88,10 @@ export class GenericConsensusEngineId extends u32 {
     return this.registry.createType('AccountId', bytes);
   }
 
+  private _getH160Author (bytes: Bytes): AccountId {
+    return this.registry.createType('AccountId', bytes);
+  }
+
   /**
    * @description From the input bytes, decode into an author
    */
@@ -104,6 +108,11 @@ export class GenericConsensusEngineId extends u32 {
       return this._getPowAuthor(bytes);
     }
 
+    // Moonbeam is neither Aura nor Babe nor Pow and uses h160 addresses
+    if (bytes.length === 20) {
+      return this._getH160Author(bytes);
+    }
+
     return undefined;
   }