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5 votes
1 answer

Migrate keytype of StorageMap without breakin API

Assume we have a StorageMap MyMap of which we want to extend the type of the decoded keys from KeyTypeOld to an enum including the old type as well as a new one. Before pub type MyMap = StorageMap<...
William Freudenberger's user avatar
5 votes
2 answers

How to decode extrinsic at json-RPC call's data(byte code)

I call json-RPC through the terminal and get the data as below. extrinsics is raw byte, but I'm using polkadot-js(SCALE codec?) to decode it. But I don't know which method to call. "block": ...
PaperFrog's user avatar
  • 495
0 votes
1 answer

How to construct the data structure with correct values for their attributes within a Pallet for data submitted by a polkadotJS app

Client App creates an Input as follows using polkadotJS to submit to Substrate Module as follows import { ApiPromise, WsProvider } from '@polkadot/api'; const { Keyring } = require('@polkadot/keyring')...
Kalanamith's user avatar