# `Appsignal.TransactionRegistry`
[🔗](https://github.com/appsignal/appsignal-elixir/blob/v2.17.0/lib/appsignal/transaction_registry.ex#L1)

# `lookup`

> This function is deprecated. Use Appsignal.Tracer.current_span/0-1 instead.

# `register`

> This function is deprecated. Use Appsignal.Tracer.create_span/1-3 instead.

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*Consult [api-reference.md](api-reference.md) for complete listing*