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author | Leonid <logvinov.leon@gmail.com> | 2018-02-05 19:33:40 +0800 |
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committer | GitHub <noreply@github.com> | 2018-02-05 19:33:40 +0800 |
commit | 7b4f2b47de393b7ed6d5c264c8e80864d196180c (patch) | |
tree | 8e86af8000e0aedd7241a00c2189d8f7ca0fc2ad /packages/dev-utils/src/web3_factory.ts | |
parent | 400a97e7a8f76d894d47368425bbe1e33fa5b255 (diff) | |
parent | c7ad6ebad6ab65a4b1e4a2084e744c6ca2bc09b8 (diff) | |
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Merge branch 'development' into fix/ether_token_address
Diffstat (limited to 'packages/dev-utils/src/web3_factory.ts')
-rw-r--r-- | packages/dev-utils/src/web3_factory.ts | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/packages/dev-utils/src/web3_factory.ts b/packages/dev-utils/src/web3_factory.ts new file mode 100644 index 000000000..26c26e03d --- /dev/null +++ b/packages/dev-utils/src/web3_factory.ts @@ -0,0 +1,42 @@ +// HACK: web3 injects XMLHttpRequest into the global scope and ProviderEngine checks XMLHttpRequest +// to know whether it is running in a browser or node environment. We need it to be undefined since +// we are not running in a browser env. +// Filed issue: https://github.com/ethereum/web3.js/issues/844 +(global as any).XMLHttpRequest = undefined; +import ProviderEngine = require('web3-provider-engine'); +import RpcSubprovider = require('web3-provider-engine/subproviders/rpc'); + +import { EmptyWalletSubprovider } from './subproviders/empty_wallet_subprovider'; +import { FakeGasEstimateSubprovider } from './subproviders/fake_gas_estimate_subprovider'; + +import { constants } from './constants'; + +// HACK: web3 leaks XMLHttpRequest into the global scope and causes requests to hang +// because they are using the wrong XHR package. +// importing web3 after subproviders fixes this issue +// Filed issue: https://github.com/ethereum/web3.js/issues/844 +// tslint:disable-next-line:ordered-imports +import * as Web3 from 'web3'; + +export const web3Factory = { + create(hasAddresses: boolean = true): Web3 { + const provider = this.getRpcProvider(hasAddresses); + const web3 = new Web3(); + web3.setProvider(provider); + return web3; + }, + getRpcProvider(hasAddresses: boolean = true): Web3.Provider { + const provider = new ProviderEngine(); + if (!hasAddresses) { + provider.addProvider(new EmptyWalletSubprovider()); + } + provider.addProvider(new FakeGasEstimateSubprovider(constants.GAS_ESTIMATE)); + provider.addProvider( + new RpcSubprovider({ + rpcUrl: constants.RPC_URL, + }), + ); + provider.start(); + return provider; + }, +}; |