From ae913e41409ab9cebb573791da8aa1813e253f63 Mon Sep 17 00:00:00 2001
From: Eduardo Pereira <eduardonunesp@gmail.com>
Date: Thu, 21 Mar 2019 16:52:55 -0300
Subject: [PATCH] Adaptations to be compatible with block explorers

---
 src/loom-provider.ts | 38 +++++++++++++++++++++++++++++++++++---
 1 file changed, 35 insertions(+), 3 deletions(-)

diff --git a/src/loom-provider.ts b/src/loom-provider.ts
index a76b5ed2..b1b2526c 100644
--- a/src/loom-provider.ts
+++ b/src/loom-provider.ts
@@ -176,11 +176,35 @@ const numberToHexLC = (num: number): string => {
   return numberToHex(num).toLowerCase()
 }
 
+const ZEROED_HEX_256 =
+  '0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000'
 const ZEROED_HEX_32 = '0x0000000000000000000000000000000000000000000000000000000000000000'
 const ZEROED_HEX_20 = '0x0000000000000000000000000000000000000000'
 const ZEROED_HEX_8 = '0x0000000000000000'
 const ZEROED_HEX = '0x0'
 
+const BLOCK_ZERO: IEthBlock = {
+  number: ZEROED_HEX,
+  hash: '0x0000000000000000000000000000000000000000000000000000000000000001',
+  parentHash: ZEROED_HEX_32,
+  nonce: ZEROED_HEX_8,
+  sha3Uncles: ZEROED_HEX_32,
+  logsBloom: ZEROED_HEX_256,
+  transactionsRoot: ZEROED_HEX_32,
+  stateRoot: ZEROED_HEX_32,
+  receiptsRoot: ZEROED_HEX_32,
+  miner: ZEROED_HEX_20,
+  difficulty: ZEROED_HEX,
+  totalDifficulty: ZEROED_HEX,
+  extraData: ZEROED_HEX,
+  size: ZEROED_HEX,
+  gasLimit: ZEROED_HEX,
+  gasUsed: ZEROED_HEX,
+  timestamp: '0x5af97a40',
+  transactions: [],
+  uncles: []
+}
+
 /**
  * Web3 provider that interacts with EVM contracts deployed on Loom DAppChains.
  */
@@ -502,6 +526,10 @@ export class LoomProvider {
     const blockHash = payload.params[0]
     const isFull = payload.params[1] || true
 
+    if (blockHash === ZEROED_HEX_32) {
+      return Promise.resolve(BLOCK_ZERO)
+    }
+
     const result = await this._client.getEvmBlockByHashAsync(blockHash, isFull)
 
     if (!result) {
@@ -515,6 +543,11 @@ export class LoomProvider {
     const blockNumberToSearch =
       payload.params[0] === 'latest' ? payload.params[0] : hexToNumber(payload.params[0])
     const isFull = payload.params[1] || true
+
+    if (blockNumberToSearch === 0) {
+      return Promise.resolve(BLOCK_ZERO)
+    }
+
     const result = await this._client.getEvmBlockByNumberAsync(`${blockNumberToSearch}`, isFull)
 
     if (!result) {
@@ -770,10 +803,9 @@ export class LoomProvider {
       }
     })
 
-    // TODO: Should be on backed
-    // Ugly fix, since block 0x1 has a parent hash block ZEROED_HEX_32
+    // Parent hash is empty for the block 0x1 so this fix it
     if (parentHash === '0x' && number === '0x1') {
-      parentHash = ZEROED_HEX_32
+      parentHash = '0x0000000000000000000000000000000000000000000000000000000000000001'
     }
 
     // Some ZEROED values aren't at the moment