Rotating Blockchain API Keys Without Losing Control
Plan API key rotation with explicit ownership, overlap limits and revocation checks, while keeping credentials out of logs and public client code.
Overview
When translating these concepts into an integration, keep the scope described by the wallet history api with the result. The examples in wallet transaction history and smart contract event logs show how the same distinction affects neighbouring data questions.
Key rotation changes which credential authorises future requests. A safe process verifies the new credential and revokes the old one under a controlled plan rather than merely saving a replacement string.
Define the rotation boundary
Identify the consuming service, tenant, project and permitted operations. Create a replacement with the intended least-privilege scope. If overlap is supported, keep it short and documented. Updating one worker does not rotate every consumer; inventory all processes that use the credential without copying the secret into the inventory.
Worked example: two backend workers
Worker A switches to the replacement key while B still uses the old key. Immediate revocation breaks B, while indefinite overlap leaves unnecessary access active. A staged change verifies both workers, then revokes the old key and confirms it is rejected through a safe access check.
Test failure and rollback rules
Handle an invalid replacement, delayed configuration propagation and a consumer that cannot restart immediately. Do not log full keys during diagnosis. Rollback must respect whether the old credential remains valid and authorised. Record credential identifiers and safe outcome codes, not secret values, in the rotation evidence.
A practical acceptance test
Simulate two consumers switching at different times. Verify the replacement’s intended scope, a bounded overlap period and rejection of the revoked identifier afterward. Keep safe key IDs in the evidence, never secret values. A failed replacement validation should not silently broaden permissions or fall back to an unrelated customer credential.
Questions about the topic
Frequently asked questions
Does saving a new key revoke the old one?
Not automatically. Revocation is a separate operation.
Should all keys have the same scope?
No. Use scopes appropriate to each service and environment.
Standards & technical documentation
