[Bug] Asimov and Bradbury testnets share the same chain ID (4221), breaking consensus initialization and replay protection

[zakaziko86]

Description

Both testnet_asimov and testnet_bradbury define id=4221, creating a chain ID collision.

genlayer_py/chains/testnet_asimov.py:22:

testnet_asimov: GenLayerChain = GenLayerChain(
    id=4221,
    name="Genlayer Asimov Testnet",

genlayer_py/chains/testnet_bradbury.py:119:

testnet_bradbury: GenLayerChain = GenLayerChain(
    id=4221,
    name="Genlayer Bradbury Testnet",

Impact

• Consensus initialization is skipped for Bradbury — initialize_consensus_smart_contract() returns early for BOTH testnets since they share the same ID.
• EIP-155 replay protection is broken — transactions signed for one testnet can be replayed on the other.
• Wallet/explorer differentiation fails.

Suggested Fix

Assign unique chain IDs:

• Asimov: 4221
• Bradbury: 4222

Notes

• Blockchain chain IDs must be globally unique per EIP-155.
• Check CLI, JS SDK, and Studio for hardcoded 4221.