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-0x packages are promise-based libraries. This means that whenever an asynchronous call is required, the library method will return a native Javascript promise. You can therefore choose between using `promise` or `async/await` syntax when calling our async methods.
-
-_Async/await syntax (recommended):_
-
-```javascript
-try {
- const signature = await signatureUtils.ecSignOrderHashAsync(
- providerEngine,
- orderHashHex,
- maker,
- SignerType.Default,
- );
-} catch (error) {
- console.log('Caught error: ', error);
-}
-```
-
-_Promise syntax:_
-
-```javascript
-signatureUtils
- .ecSignOrderHashAsync(providerEngine, orderHashHex, maker, SignerType.Default)
- .then(function(signature) {
- console.log(signature);
- })
- .catch(function(error) {
- console.log('Caught error: ', error);
- });
-```
-
-As is the convention with promise-based libraries, if an error occurs, it is thrown. It is the callers responsibility to catch thrown errors and to handle them appropriately.