Bug: ArkivModule.execute() sends ABI-encoded contract calls instead of raw Golem Base transactions on Braga testnet

[HavenCTO]

Summary

The ArkivModule.execute() method is fundamentally broken for the Braga testnet. It attempts to send ABI-encoded smart contract calls to 0x4400...0044 (EntityRegistry), where no contract exists. The Braga node expects raw Golem Base storage transactions to the system address 0x0000...61726b6976 ("arkiv").

Environment

• arkiv-sdk version: 1.0.0b3.dev0
• Network: Braga Testnet

Root Cause

The SDK's execute() method uses the contract.functions.execute(ops).transact() path, which results in:

• To Address: 0x4400...0044 (No bytecode deployed on Braga)
• Calldata: ABI-encoded execute(ops)
• Result: Revert with "non-golembase transaction"

Proof of Concept / Expected Behavior

A manual transaction sending raw Golem Base encoding to 0x0000...61726b6976 succeeds:

• To Address: 0x0000...61726b6976 (System-level handler)
• Calldata: 47 bytes raw Golem Base encoding
• Result: Success (21740 gas, EntityCreated event emitted)
• Tx Hash: 0xc2ee...af37

Misleading Error

non_golem_base_transaction_error - The problem is the transaction format, not the SDK version.

Required Fix

ArkivModule.execute() needs to:

1. Send transactions to 0x0000...61726b6976 instead of 0x4400...0044.
2. Use raw Golem Base encoding instead of ABI encoding.

PLEASE ADVISE