AgreementStoreManager fails when agreement not found

[H34D]

Describe the bug

sdk-js/src/keeper/contracts/managers/AgreementStoreManager.ts

Lines 36 to 53 in 3c5d0d9

	public async getAgreement(agreementId: string): Promise<AgreementData> {
	const templateId: string = await this.call('getAgreementTemplate', [
	zeroX(agreementId)
	])
	const events = await this.templates[templateId].getAgreementCreatedEvent(
	agreementId
	)
	const values = events.map(e => e.returnValues || e)
	const { _did, _didOwner, _conditionIds, _conditionIdSeeds } = values[0]
	return {
	did: _did,
	agreementId,
	didOwner: _didOwner,
	templateId,
	conditionIdSeeds: _conditionIdSeeds,
	conditionIds: _conditionIds
	} as AgreementData
	}

Will lead to:

TypeError: Cannot destructure property '_did' of 'values[0]' as it is undefined.

if the agreement id was not found.

To Reproduce

Steps to reproduce the behavior:

1. Try to load agreement Id that does not exist
2. fail

Expected behavior

A clear and concise description of what you expected to happen.

Screenshots

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Additional context

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