@polkadot/types/metadata/v14/toV15.js

Implementation of the Parity codec

import { objectSpread } from '@polkadot/util';
/**
 * Convert the Metadata to v15
 * @internal
 **/
export function toV15(registry, v14, _) {
    // V15 is mostly equivalent to v14 however it does add
    //
    // 1. The top-level apis entry - it is assumed that in usage we would
    //    just check for all-empty (like this would construct)
    // 2. A docs param on the pallet itself
    // 3. Additional extrinsic parameters
    //
    // A straight conversion with createTypeUndafe magic fills in details
    // We need the UncheckedExtrinsic to extract the types, at least for v14
    // which does have these details embedded (previous-gen won't populate)
    const unchecked = v14.lookup.paramTypes.SpRuntimeUncheckedExtrinsic;
    return registry.createTypeUnsafe('MetadataV15', [
        objectSpread({}, v14, {
            extrinsic: registry.createTypeUnsafe('ExtrinsicMetadataV15', [
                objectSpread({}, v14.extrinsic, {
                    addressType: unchecked?.[0].type.unwrapOr(0),
                    callType: unchecked?.[1].type.unwrapOr(0),
                    extraType: unchecked?.[3].type.unwrapOr(0),
                    signatureType: unchecked?.[2].type.unwrapOr(0)
                })
            ]),
            outerEnums: registry.createTypeUnsafe('OuterEnums15', [{
                    // FIXME We need to extract & add the errorType in here
                    // (these doesn't seem to be an esay way to detect & extract it)
                    callType: unchecked?.[1].type.unwrapOr(0),
                    eventType: v14.lookup.paramTypes.FrameSystemEventRecord?.[0].type.unwrapOr(0)
                }])
        })
    ]);
}