getSignatureConfirmation accepted one signature and returned null or an
object containing confirmations and status.
Removed RPC method
This JSON-RPC method was removed in Agave v2.0. Use getSignatureStatuses.
Migration
Wrap the signature in an array and read result.value[0]. The replacement's
confirmations field preserves the confirmation count. Prefer err for the
transaction outcome: null means success and a non-null value is the execution
error. The replacement also returns slot and confirmationStatus.
If the legacy call supplied a commitment, compare confirmationStatus with that
level because getSignatureStatuses does not accept a commitment option. Treat
the levels as processed < confirmed < finalized; an equal or stronger
returned level satisfies the request.
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