Error calling getArbitrarySignature (TypeError: t(...)[u] is not a function)

[jurosh]

As per docs here https://get-scatter.com/docs/api-request-arbitrary-signature

Scatter should be able to get signature like:

// getScatterEosInstance is getting eos instance based on network...
const scatterInstance = getScatterEosInstance([
    { actor: makerAccount, permission: 'active' }
  ]);
const scattertSignature = await scatterInstance.getArbitrarySignature(
    makerPublicKey,
    'test', // orderBuffer.toString(),
    'Order signing',
    false
  );

Instead promise is rejected with reason:

"TypeError: t(...)[u] is not a function
    at Promise (chrome-extension://ammjpmhgckkpcamddpolhchgomcojkle/inject.js:40:270202)
    at new Promise (<anonymous>)
    at Proxy.n (chrome-extension://ammjpmhgckkpcamddpolhchgomcojkle/inject.js:40:270118)
    at _callee$ (webpack-internal:///./src/client/eos/trading.js:100:49)
    at tryCatch (webpack-internal:///./node_modules/babel-polyfill/node_modules/regenerator-runtime/runtime.js:65:40)
    at Generator.invoke [as _invoke] (webpack-internal:///./node_modules/babel-polyfill/node_modules/regenerator-runtime/runtime.js:303:22)
    at Generator.prototype.(anonymous function) [as next] (webpack-internal:///./node_modules/babel-polyfill/node_modules/regenerator-runtime/runtime.js:117:21)
    at step (webpack-internal:///./src/client/eos/trading.js:217:191)
    at eval (webpack-internal:///./src/client/eos/trading.js:217:437)
    at new Promise (<anonymous>)
    at eval (webpack-internal:///./src/client/eos/trading.js:217:99)
    at signOrderWithScatter (webpack-internal:///./src/client/eos/trading.js:137:18)
    at <anonymous>:1:1"

Using scatter extension 6.1.10 on Chrome (Linux)

[nsjames]

Need more code here to see what's going on ( like what getScatterEosInstance is doing ). Also, I see you're using extension, have to tried to check if this works from desktop? Lots of functionality is missing from the extension.

[jurosh]

Wanted to build and try desktop version but ran into GetScatter/ScatterDesktop#156 ❌

Here are some details about getScatterEosInstance

// Tried also with latest scatter-js and same result...
import ScatterJS from 'scatter-js/dist/scatter.esm';
import Eos from 'eosjs';

...

export const getScatterEosInstance = (
  actors: Array<{ actor: string, permission: string }>,
  moreOptions: any = {}
) => {
  const options = {
    broadcast: true,
    chainId,
    authorization: actors,
    ...moreOptions
  };
  const scatterEos = ScatterJS.scatter.eos(eosNetwork, Eos, options, 'http');
  if (scatterEos === undefined || scatterEos === null) {
    // 'failed to obtain the Scatter eosjs instance.'
    // throw error....
  }
  return scatterEos;
};

[nsjames]

Looks like you aren't pulling in the ScatterEOS plugin: https://get-scatter.com/docs/examples-interaction-flow

[jurosh]

Forgot to paste it here, but I am doing eos initialization ScatterJS.plugins(new ScatterEOS()); in another file..

Cannot make this code to be functional:

scatterInstance.getArbitrarySignature(
    userPublicKey,
    'testToSign',
    'Order signing',
    false
);

@nsjames can you confirm it's working for you ? Already tried Scatter Desktop too and looks like it's same issue - so maybe error in scatter eos plugin or am I calling it wrong way ?

[nsjames]

Those imports, and the ScatterJS.plugins(new ScatterEOS()); instantiation should be done as early as possible in your app, and only in a single location and then fetched from a global store/state-handler.

By doing:

import ScatterJS from 'scatter-js/dist/scatter.esm';
import Eos from 'eosjs';

That instance of ScatterJS has no knowledge of any plugins in any other files as the scopes are different.

[jurosh]

So I am getting into the core of issue. Looks like I have to use ScatterJS.scatter for getting signatures but I was using ScatterJS.scatter.eos instead.