Generate disclosureFrame ad hoc using the metadata during issuance

[gsiou]

Problem Statement

Right now, supported credential configurations include hard-coded disclosureFrame objects that will be passed in the sd-jwt-js library to properly generate sd claims during credential issuance. Moreover, the disclosureFrame of said configurations uses an older data format not supported anymore by the library. A helper function is utilized to maintain compatibility, but at a loss of the more expressive structure of the new disclosure frame.

Helper function: (wallet-enterprise/src/lib/signer.ts)

		function disclosureFrameConvert(obj: any) {
			const result: any = {};
			const sd = [];

			for (const [key, value] of Object.entries(obj)) {
				if (value === true) {
					sd.push(key);
				} else if (typeof value === 'object' && value !== null) {
					result[key] = disclosureFrameConvert(value);
				}
			}

			if (sd.length > 0) {
				result["_sd"] = sd;
			}

			return result;
		}

Example:
wallet-enterprise/src/credentials/SupportedCredentialsConfiguration/PIDSupportedCredentialSdJwtVCDM_VC.ts

const disclosureFrame = {
			family_name: true,
			birth_family_name: true,
			given_name: true,
			birth_given_name: true,
			personal_administrative_number: true,
			place_of_birth: {
				country: true,
				region: true,
				locality: true
			},
			birthdate: true,
			address: {
				formatted: true,
				country: true,
				region: true,
				locality: true,
				postal_code: true,
				street_address: true,
				house_number: true
			},
			age_equal_or_over: {
				"14": true,
				"18": true,
				"16": true,
				"65": true,
				"21": true,
			},
			age_in_years: true,
			age_birth_year: true,
			issuing_authority: false,
			issuing_country: false,
			issuing_jurisdiction: false,
			document_number: true,
			date_of_issuance: true,
			date_of_expiry: false,
			sex: true,
			nationalities: true,
			email: true,
			phone_number: true,
			picture: true,
			trust_anchor: false
		}

The structure expected by the library is documented here: https://github.com/openwallet-foundation/sd-jwt-js/blob/main/docs/0.x/disclosureframe.md

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Proposed Solution (Optional)

The disclosure frame information should be generated dynamically utilizing the metadata of the SDjwt credential configurations. Instead of a hardcoded object, a method must be implemented that will on-the-fly produce the disclosure frame with the latest format required by the sd-jwt-js library. We should make sure that arrays, nesting and other non-trivial types work as intended.