feat: add Era File Reading and Writing

packages/era/test/e2e-mainnet/era.readwrite.integration.test.ts

@@ -23,31 +23,14 @@ describe.runIf(!process.env.CI)("read original era and re-write our own era file
     const SPR = SLOTS_PER_HISTORICAL_ROOT;
     const stateSlot = expectedEra * SPR;
 
-    const startTime = Date.now();
-    let t0 = startTime;
-
-    console.log("stage: open and read original era file");
     const reader = await EraReader.open(config, eraPath);
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
-
-    console.log(`progress: ${reader.groups.length} group(s) found`);
 
-    console.log("stage: validate original era file");
     await reader.validate();
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
-
-    console.log("stage: create new era file writer");
     const outDir = path.resolve(__dirname, "../out");
     if (!existsSync(outDir)) mkdirSync(outDir, {recursive: true});
     let outFile = path.resolve(outDir, `mainnet-${String(expectedEra).padStart(5, "0")}-deadbeef.era`);
 
     const writer = await EraWriter.create(config, outFile, expectedEra);
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
-
-    console.log("stage: read blocks from original and write to new era file");
     const blocksIndex = reader.groups[0].blocksIndex;
     if (!blocksIndex) {
       throw new Error("Original era file missing blocks index");
@@ -57,39 +40,16 @@ describe.runIf(!process.env.CI)("read original era and re-write our own era file
       if (block === null) continue;
       await writer.writeBlock(block);
     }
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
-
-    console.log("stage: read state from original era file");
     const originalState = await reader.readState();
     expect(originalState.slot).to.equal(stateSlot);
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
-
-    console.log("stage: write state to new era file");
     await writer.writeState(originalState);
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
-
-    console.log("stage: finish reading and writing");
     await reader.close();
     outFile = await writer.finish();
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
 
     expect(basename(outFile)).to.equal(basename(eraPath));
-
-    console.log("stage: open and validate new era file");
     const newReader = await EraReader.open(config, outFile);
     await newReader.validate();
-    console.log(`  time: ${Date.now() - t0}ms`);
-    t0 = Date.now();
 
-    // Cleanup
     await newReader.close();
-
-    const totalTime = Date.now() - startTime;
-    console.log("Round-trip test passed");
-    console.log(`  Total time: ${totalTime}ms (${(totalTime / 1000).toFixed(2)}s)`);
   }, 1000000);
 });