aboutsummaryrefslogtreecommitdiffstats
path: root/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
diff options
context:
space:
mode:
Diffstat (limited to 'packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts')
-rw-r--r--packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts17
1 files changed, 14 insertions, 3 deletions
diff --git a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
index 19de17c0a..4a1d6258b 100644
--- a/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
+++ b/packages/contract-wrappers/src/contract_wrappers/contract_wrapper.ts
@@ -2,6 +2,7 @@ import { AbiDecoder, intervalUtils, logUtils } from '@0xproject/utils';
import { Web3Wrapper } from '@0xproject/web3-wrapper';
import {
BlockParamLiteral,
+ BlockWithoutTransactionData,
ContractAbi,
ContractArtifact,
FilterObject,
@@ -174,7 +175,7 @@ export abstract class ContractWrapper {
throw new Error(ContractWrappersError.SubscriptionAlreadyPresent);
}
this._blockAndLogStreamerIfExists = new BlockAndLogStreamer(
- this._web3Wrapper.getBlockAsync.bind(this._web3Wrapper),
+ this._getBlockOrNullAsync.bind(this),
this._web3Wrapper.getLogsAsync.bind(this._web3Wrapper),
ContractWrapper._onBlockAndLogStreamerError.bind(this, isVerbose),
);
@@ -194,6 +195,13 @@ export abstract class ContractWrapper {
this._onLogStateChanged.bind(this, isRemoved),
);
}
+ private async _getBlockOrNullAsync(): Promise<BlockWithoutTransactionData | null> {
+ const blockIfExists = await this._web3Wrapper.getBlockIfExistsAsync.bind(this._web3Wrapper);
+ if (_.isUndefined(blockIfExists)) {
+ return null;
+ }
+ return blockIfExists;
+ }
// 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
// who inherit from ContractWrapper, and it is only used by the internal implementation
@@ -212,11 +220,14 @@ export abstract class ContractWrapper {
delete this._blockAndLogStreamerIfExists;
}
private async _reconcileBlockAsync(): Promise<void> {
- const latestBlock = await this._web3Wrapper.getBlockAsync(BlockParamLiteral.Latest);
+ const latestBlockIfExists = await this._web3Wrapper.getBlockIfExistsAsync(BlockParamLiteral.Latest);
+ if (_.isUndefined(latestBlockIfExists)) {
+ 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((latestBlock as any) as Block);
+ await this._blockAndLogStreamerIfExists.reconcileNewBlock((latestBlockIfExists as any) as Block);
}
}
}