From 0afe55f2ff028d03e3a9f110819806f68446dee9 Mon Sep 17 00:00:00 2001
From: Fabio Berger <me@fabioberger.com>
Date: Tue, 25 Sep 2018 11:20:09 +0100
Subject: Refactor blockstream integration to use the proper callback method
 interface

---
 .../src/contract_wrappers/contract_wrapper.ts      | 40 ++++++++++++++++------
 1 file changed, 29 insertions(+), 11 deletions(-)

(limited to 'packages/contract-wrappers')

diff --git a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
index 19a882712..660f2d122 100644
--- a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
@@ -175,8 +175,8 @@ export abstract class ContractWrapper {
             throw new Error(ContractWrappersError.SubscriptionAlreadyPresent);
         }
         this._blockAndLogStreamerIfExists = new BlockAndLogStreamer(
-            this._getBlockOrNullAsync.bind(this),
-            this._web3Wrapper.getLogsAsync.bind(this._web3Wrapper),
+            this._blockstreamGetBlockOrNullAsync.bind(this),
+            this._blockstreamGetLogsAsync.bind(this),
             ContractWrapper._onBlockAndLogStreamerError.bind(this, isVerbose),
         );
         const catchAllLogFilter = {};
@@ -196,12 +196,30 @@ export abstract class ContractWrapper {
         );
     }
     // This method only exists in order to comply with the expected interface of Blockstream's constructor
-    private async _getBlockOrNullAsync(): Promise<BlockWithoutTransactionData | null> {
-        const blockIfExists = await this._web3Wrapper.getBlockIfExistsAsync.bind(this._web3Wrapper);
-        if (_.isUndefined(blockIfExists)) {
-            return null;
-        }
-        return blockIfExists;
+    private async _blockstreamGetBlockOrNullAsync(hash: string): Promise<Block | null> {
+        const shouldIncludeTransactionData = false;
+        const blockOrNull = await this._web3Wrapper.sendRawPayloadAsync({
+            method: 'eth_getBlockByHash',
+            params: [hash, shouldIncludeTransactionData],
+        });
+        return blockOrNull as Block;
+    }
+    // This method only exists in order to comply with the expected interface of Blockstream's constructor
+    private async _blockstreamGetLatestBlockOrNullAsync(): Promise<Block | null> {
+        const shouldIncludeTransactionData = false;
+        const blockOrNull = await this._web3Wrapper.sendRawPayloadAsync({
+            method: 'eth_getBlockByNumber',
+            params: ['latest', shouldIncludeTransactionData],
+        });
+        return blockOrNull as Block;
+    }
+    // This method only exists in order to comply with the expected interface of Blockstream's constructor
+    private async _blockstreamGetLogsAsync(filterOptions: FilterObject): Promise<Log[]> {
+        const logs = await this._web3Wrapper.sendRawPayloadAsync({
+            method: 'eth_getLogs',
+            params: [filterOptions],
+        });
+        return logs as Log[];
     }
     // HACK: This should be a package-scoped method (which doesn't exist in TS)
     // We don't want this method available in the public interface for all classes
@@ -221,14 +239,14 @@ export abstract class ContractWrapper {
         delete this._blockAndLogStreamerIfExists;
     }
     private async _reconcileBlockAsync(): Promise<void> {
-        const latestBlockIfExists = await this._web3Wrapper.getBlockIfExistsAsync(BlockParamLiteral.Latest);
-        if (_.isUndefined(latestBlockIfExists)) {
+        const latestBlockOrNull = await this._blockstreamGetLatestBlockOrNullAsync();
+        if (_.isNull(latestBlockOrNull)) {
             return; // noop
         }
         // We need to coerce to Block type cause Web3.Block includes types for mempool blocks
         if (!_.isUndefined(this._blockAndLogStreamerIfExists)) {
             // If we clear the interval while fetching the block - this._blockAndLogStreamer will be undefined
-            await this._blockAndLogStreamerIfExists.reconcileNewBlock((latestBlockIfExists as any) as Block);
+            await this._blockAndLogStreamerIfExists.reconcileNewBlock((latestBlockOrNull as any) as Block);
         }
     }
 }
-- 
cgit v1.2.3