Type 'Web3EthereumProvider' is not assignable to type 'AsyncSendable' in web3.js >= 1.0.0-beta.38

[bohendo]

I'm trying to follow the web3 integration cookbook receipt in Typescript:

this.provider = new eth.providers.Web3Provider(opts.web3.currentProvider)

Where opts.web3 is an instance of a more recent web3.js release > 1.0.0-beta.37

I get an error while transpiling:

src/Wallet.ts:34:54 - error TS2345: Argument of type 'Web3EthereumProvider | HttpProvider | IpcProvider | WebsocketProvider | CustomProvider' is not assignable to parameter of type 'AsyncSendable'.
  Type 'Web3EthereumProvider' is not assignable to type 'AsyncSendable'.
    Types of property 'send' are incompatible.
      Type '(method: string, parameters: any[]) => Promise<any>' is not assignable to type '(request: any, callback: (error: any, response: any) => void) => void'.
        Types of parameters 'parameters' and 'callback' are incompatible.
          Type '(error: any, response: any) => void' is missing the following properties from type 'any[]': pop, push, concat, join, and 25 more.

34       this.provider = new eth.providers.Web3Provider(opts.web3.currentProvider)
                                                        ~~~~~~~~~~~~~~~~~~~~~~~~~

Looks like web3.js HttpProvider got up upgraded interface in versions >= 1.0.0-beta.38:

export class HttpProvider {
    constructor(host: string, options?: HttpProviderOptions);
    host: string;
    connected: boolean;
    send(method: string, parameters: any[]): Promise<object>;
    sendBatch(methods: AbstractMethod[], moduleInstance: AbstractWeb3Module): Promise<object[]>;
    disconnect(): boolean;
}

And ethers.providers.Web3Provider is expecting an AsyncSendable w an interface:

export type AsyncSendable = {
    isMetaMask?: boolean;
    host?: string;
    path?: string;
    sendAsync?: (request: any, callback: (error: any, response: any) => void) => void
    send?: (request: any, callback: (error: any, response: any) => void) => void
}

Looks like web3's new interface is specced out in EPI-1193 and issue #235 mentioned this.

Using ethers version ^4.0.27

[bohendo]

Oops, right after submitting I found #374, looks like this is a dup

[bohendo]

Oops, #374 is related but this isn't actually a dup

[ricmoo]

Does it work if you cast it to any?

It is hard to deal with all the signature changes in a backward compatible way... But I can likely just expand the definition.

[bohendo]

Cool, compilation errors disappear with:

this.provider = new eth.providers.Web3Provider((opts.web3.currentProvider as any))

I'll reopen if I encounter related issues.