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author | Fabio Berger <me@fabioberger.com> | 2017-06-11 19:41:28 +0800 |
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committer | GitHub <noreply@github.com> | 2017-06-11 19:41:28 +0800 |
commit | 4e56c299263cf6a3397a1d7b95fb92a8b61da3c0 (patch) | |
tree | ec2ed737cb24c4d4883d1b2253fc4e35c25ec9df /src/utils/decorators.ts | |
parent | 7838e1964f112b8df63422c23a675a7946c7b9e3 (diff) | |
parent | 88de98080cda4933ed8b15246c59891aa182d31e (diff) | |
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Merge pull request #60 from 0xProject/error-decorator
Add initial error handling decorator implementation
Diffstat (limited to 'src/utils/decorators.ts')
-rw-r--r-- | src/utils/decorators.ts | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/src/utils/decorators.ts b/src/utils/decorators.ts new file mode 100644 index 000000000..a25f2cff5 --- /dev/null +++ b/src/utils/decorators.ts @@ -0,0 +1,35 @@ +import * as _ from 'lodash'; +import {constants} from './constants'; +import {AsyncMethod, ZeroExError} from '../types'; + +export const decorators = { + /** + * Source: https://stackoverflow.com/a/29837695/3546986 + */ + contractCallErrorHandler(target: object, + key: string|symbol, + descriptor: TypedPropertyDescriptor<AsyncMethod>, + ): TypedPropertyDescriptor<AsyncMethod> { + const originalMethod = (descriptor.value as AsyncMethod); + + // Do not use arrow syntax here. Use a function expression in + // order to use the correct value of `this` in this method + // tslint:disable-next-line:only-arrow-functions + descriptor.value = async function(...args: any[]) { + try { + const result = await originalMethod.apply(this, args); + return result; + } catch (error) { + if (_.includes(error.message, constants.INVALID_JUMP_PATTERN)) { + throw new Error(ZeroExError.INVALID_JUMP); + } + if (_.includes(error.message, constants.OUT_OF_GAS_PATTERN)) { + throw new Error(ZeroExError.OUT_OF_GAS); + } + throw error; + } + }; + + return descriptor; + }, +}; |