EventRecord + DoubleMap conversion on metadata fails

[xlc]

VM104:37 2019-05-14 14:11:18   API/DECORATOR: FATAL: Unable to initialize the API:  Cannot convert 'DoubleMapType' via asType
window.console.error @ VM104:37
m @ logger.js:83
error @ logger.js:129
(anonymous) @ Base.js:379
async function (async)
(anonymous) @ Base.js:364
u.emit @ index.js:201
emit @ Provider.js:343
onSocketOpen @ Provider.js:159

Relates to paritytech/substrate#2491 as it introduce usage of double map in substrate
Should be fixed by #776

[jacogr]

EventRecord has a new topics field added - https://github.com/polkadot-js/api/blob/master/packages/types/src/type/EventRecord.ts#L81 vs https://github.com/paritytech/substrate/blob/master/srml/system/src/lib.rs#L212

Full definition with storage - https://github.com/paritytech/substrate/blob/master/srml/system/src/lib.rs#L322-L345

Effectively 2 things happen -

• EventRecord is not being parsed correctly - extra field of Vec<Hash> exists now
• DoubleMap is not being being handled properly in the Metadata

[jacogr]

Closed in #901 & #902

[polkadot-js-bot]

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