api/bind: Add CallOpts.BlockHash to allow calling contracts at a specific block hash #28084
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Adds
BlockHash
toCallOpts
so contract bindings can be used to call contracts at a specific block hash. Previously only block number or pending was supported.Backwards compatibility is preserved by introducing a new
BlockHashContractCaller
interface with theCallContractAtHash
andCodeAtHash
methods required from the backend, following a similar pattern toPendingContractCaller
. Simulated backend is updated to support the new methods andCodeAtHash
has been added toethclient.Client
- it already supportedCallContractAtHash
.Fixes #28017