Some more solid/qualified EVM dummy blockchain + interface naming to allow for exporting

Author: holgerd77

packages/evm/src/constructors.ts

@@ -2,7 +2,7 @@ import { Common, Mainnet } from '@ethereumjs/common'
 import { SimpleStateManager } from '@ethereumjs/statemanager'
 
 import { NobleBN254 } from './precompiles/index.js'
-import { DefaultBlockchain } from './types.js'
+import { EVMMockBlockchain } from './types.js'
 
 import { EVM } from './index.js'
 
@@ -25,7 +25,7 @@ export async function createEVM(createOpts?: EVMOpts) {
   }
 
   if (opts.blockchain === undefined) {
-    opts.blockchain = new DefaultBlockchain()
+    opts.blockchain = new EVMMockBlockchain()
   }
 
   if (opts.stateManager === undefined) {

packages/evm/src/types.ts

@@ -343,9 +343,13 @@ export interface EVMOpts {
   stateManager?: StateManagerInterface
 
   /**
+   * The EVM comes with a basic mock blockchain interface and implementation for
+   * non-block containing use cases.
    *
+   * For block-containing setups use the full blockchain implementation from the
+   * `@ethereumjs/blockchain package.
    */
-  blockchain?: Blockchain
+  blockchain?: EVMMockBlockchainInterface
 
   /**
    *
@@ -472,16 +476,16 @@ export interface TransientStorageInterface {
   clear(): void
 }
 
-type MockBlock = {
+export type EVMMockBlock = {
   hash(): Uint8Array
 }
 
-export interface Blockchain {
-  getBlock(blockId: number): Promise<MockBlock>
-  shallowCopy(): Blockchain
+export interface EVMMockBlockchainInterface {
+  getBlock(blockId: number): Promise<EVMMockBlock>
+  shallowCopy(): EVMMockBlockchainInterface
 }
 
-export class DefaultBlockchain implements Blockchain {
+export class EVMMockBlockchain implements EVMMockBlockchainInterface {
   async getBlock() {
     return {
       hash() {