feat: use on-chain discoverability for deposits #59
Description
End goal: Stop calling zks_getBridgeContracts for deposits
Motivation: This RPC method is scheduled for deprecation
We only use two fields from the return object both of which can be replaced with on-chain discoverability:
l1_shared_default_bridge = bridgeHub.sharedBridge()l2_shared_default_bridge = 0x10003