avoid crashing if all receipts are invalid

[carlosvdr]

Solving issue #214
Added function along with this fix to tap-core

[gitguardian]

⚠️ GitGuardian has uncovered 2 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
11054344	Triggered	Username Password	93bc3f5	tap-agent/minimal-config-example.toml	View secret
11054344	Triggered	Username Password	93bc3f5	tap-agent/maximal-config-example.toml	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secrets safely. Learn here the best practices.
3. Revoke and rotate these secrets.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

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^{🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.}

[github-actions]

Pull Request Test Coverage Report for Build 10168845147

Details

• 69 of 88 (78.41%) changed or added relevant lines in 1 file are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage increased (+0.1%) to 66.145%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
tap-agent/src/agent/sender_allocation.rs	69	88	78.41%

Files with Coverage Reduction	New Missed Lines	%
common/src/tap/checks/deny_list_check.rs	1	93.64%

Totals
Change from base Build 10115454808:	0.1%
Covered Lines:	3890
Relevant Lines:	5881

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💛 - Coveralls