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author | Leonid Logvinov <logvinov.leon@gmail.com> | 2018-01-19 22:34:28 +0800 |
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committer | Leonid Logvinov <logvinov.leon@gmail.com> | 2018-01-30 23:01:36 +0800 |
commit | 709026bf1a49d468850b4ebed845c8598fa4fd75 (patch) | |
tree | 496c9889b0494112239cd720315b213a0b89befa /packages/dev-utils/src/subproviders/fake_gas_estimate_subprovider.ts | |
parent | f2b2b867866faa92256bc175e651e038001cef4d (diff) | |
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Refactor contracts tests to not use injected web3 instance
Diffstat (limited to 'packages/dev-utils/src/subproviders/fake_gas_estimate_subprovider.ts')
-rw-r--r-- | packages/dev-utils/src/subproviders/fake_gas_estimate_subprovider.ts | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/packages/dev-utils/src/subproviders/fake_gas_estimate_subprovider.ts b/packages/dev-utils/src/subproviders/fake_gas_estimate_subprovider.ts new file mode 100644 index 000000000..b455a0ed7 --- /dev/null +++ b/packages/dev-utils/src/subproviders/fake_gas_estimate_subprovider.ts @@ -0,0 +1,34 @@ +import { JSONRPCPayload } from '@0xproject/types'; + +/* + * This class implements the web3-provider-engine subprovider interface and returns + * the constant gas estimate when queried. + * HACK: We need this so that our tests don't use testrpc gas estimation which sometimes kills the node. + * Source: https://github.com/trufflesuite/ganache-cli/issues/417 + * Source: https://github.com/trufflesuite/ganache-cli/issues/437 + * Source: https://github.com/MetaMask/provider-engine/blob/master/subproviders/subprovider.js + */ +export class FakeGasEstimateSubprovider { + private _constantGasAmount: number; + constructor(constantGasAmount: number) { + this._constantGasAmount = constantGasAmount; + } + // This method needs to be here to satisfy the interface but linter wants it to be static. + // tslint:disable-next-line:prefer-function-over-method + public handleRequest(payload: JSONRPCPayload, next: () => void, end: (err: Error | null, result: any) => void) { + switch (payload.method) { + case 'eth_estimateGas': + end(null, this._constantGasAmount); + return; + + default: + next(); + return; + } + } + // Required to implement this method despite not needing it for this subprovider + // tslint:disable-next-line:prefer-function-over-method + public setEngine(engine: any) { + // noop + } +} |