fix error data propagation viem adapter#237
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andrevmatos
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Apr 24, 2026
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This pull request enhances the error-handling path for EVM chain interactions in the SDK, particularly when using the Viem transport provider. The main focus is to ensure that revert data from failed contract calls is preserved and correctly decoded, achieving parity between the Viem-based and ethers.js-based providers. It also adds comprehensive tests to verify this behavior.
Error handling and data preservation improvements:
ViemTransportProviderinclient-adapter.tsto walk the Viem error chain and extract revert data, forwarding it in the JSON-RPC error envelope. This enables downstream decoding of custom errors, such asTokenMaxCapacityExceeded, by the SDK..rawrevert bytes when available, and using the EIP-1474 execution-reverted error code when revert data is present.Testing and validation:
fork.test.tsthat sends over-capacity transactions through both the Viem and ethers.js providers, asserting that the SDK decodes and surfaces custom errors identically in both cases. This ensures functional parity and robustness of the error decoding logic.fork.test.tsto support the new test cases. [1] [2]BaseErrorin the adapter for improved error introspection.