Implement xdr transaction builder and signer for soroban contract calls in backend - #896
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July 19, 2026 14:39
…nt related database functionality
…ogging and auth introspection
…ted readiness endpoint for resilient monitoring
…r and ESLint configurations
…alls with simulation, signing, and auto-retry capabilities
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#close
#796
Summary
This PR introduces SorobanTransactionBuilder in src/utils/contract.ts, providing a robust, stateless, and fully typed transaction pipeline for building, simulating, signing, and submitting Soroban contract invocations on Steller
Key Changes
Build (buildContractCall): Retrieves source account sequence numbers directly from Soroban RPC and builds the un-simulated contract call Transaction.
Simulate (simulate): Invokes server.simulateTransaction, computes resource footprint/fees via SorobanRpc.assembleTransaction, and extracts authorization entries (SorobanAuthorizationEntry[]).
Sign & Fee-Bump (sign): Supports signing with source keypairs and creating/signing fee-bump transaction envelopes (FeeBumpTransaction) for sponsored transactions.