bridge/classes/BaseBridgeStrategy.md

Base class providing common functionality for bridge strategies.

Concrete strategies extend this class and implement chain-specific logic.

Implements

• BridgeStrategy

Properties

Property	Modifier	Type	Description
network	abstract readonly	ExternalNetwork	The external network this strategy handles.

Methods

bridgeIn()

abstract bridgeIn(params): Promise<BridgeTransaction>

Bridge tokens IN from external chain to GalaChain.

Flow:

1. Approve bridge contract (if needed)
2. Deposit tokens to bridge contract
3. Register the deposit with GalaConnect
4. Receive native tokens on GalaChain

Parameters

Parameter	Type	Description
params	BridgeInParams	Bridge in parameters

Returns

Promise<BridgeTransaction>

Transaction details with tracking info

Implementation of

BridgeStrategy.bridgeIn

---

bridgeOut()

abstract bridgeOut(params): Promise<BridgeTransaction>

Bridge tokens OUT from GalaChain to external chain.

Flow:

1. Lock tokens on GalaChain (via GalaConnect)
2. Wait for bridge confirmation
3. Receive wrapped tokens on external chain

Parameters

Parameter	Type	Description
params	BridgeOutParams	Bridge out parameters

Returns

Promise<BridgeTransaction>

Transaction details with tracking info

Implementation of

BridgeStrategy.bridgeOut

---

estimateFee()

abstract estimateFee(tokenSymbol): Promise<BridgeFeeEstimate>

Estimate bridge fees for a transfer (a per-transfer cost: it does not depend on the amount).

Parameters

Parameter	Type	Description
tokenSymbol	string	Token symbol (e.g., 'GALA', 'GUSDC')

Returns

Promise<BridgeFeeEstimate>

Fee estimate with breakdown

Implementation of

BridgeStrategy.estimateFee

---

getStatus()

abstract getStatus(transactionHash): Promise<BridgeStatus>

Get the current status of a bridge transaction.

Parameters

Parameter	Type	Description
transactionHash	string	The bridge transaction hash

Returns

Promise<BridgeStatus>

Current status with details

Implementation of

BridgeStrategy.getStatus

---

getSupportedTokens()

abstract getSupportedTokens(): string[]

Get the list of supported tokens for this chain.

Returns

string[]

Array of token symbols supported by this bridge

Implementation of

BridgeStrategy.getSupportedTokens

---

isTokenSupported()

abstract isTokenSupported(tokenSymbol): boolean

Check if a specific token is supported for bridging.

Parameters

Parameter	Type	Description
tokenSymbol	string	Token symbol to check

Returns

boolean

True if token can be bridged

Implementation of

BridgeStrategy.isTokenSupported

---

isValidAddress()

abstract isValidAddress(address): boolean

Validate a recipient address for the external chain.

Parameters

Parameter	Type	Description
address	string	Address to validate

Returns

boolean

True if address is valid for this chain

Implementation of

BridgeStrategy.isValidAddress

---

waitForCompletion()

waitForCompletion(transactionHash, options?): Promise<BridgeStatus>

Default implementation of waitForCompletion with polling.

Strategies can override this if they have chain-specific event subscription capabilities.

Parameters

Parameter	Type
transactionHash	string
options?	WaitOptions

Returns

Promise<BridgeStatus>

Implementation of

BridgeStrategy.waitForCompletion