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-# 2022-05-13
+# 2024-05-14
+
+## Scoping
+
+- Wallet Router
+  - I've analysed the main components of the wallet router, see here:
+    - [wallet/router analysis](./analysis/wallet_router.md)
+
+## Schedule
+- I raised an axe to the crew meetings, swung hard and true. Toppled and prostrate they settled motionless. Tonight we revel in the light of their embers!
+
+---
+
+# 2024-05-13
 
 ## Scoping
 
diff --git a/analysis/wallet_router.md b/analysis/wallet_router.md
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+# Constants and Types
+- `EstimateUsername` and `EstimatePubKey` are used as placeholder data in estimation calculations.
+- `SendType` is an enum that categorises the types of transaction that the router supports
+  - e.g. transfers, ENS (Ethereum Name Service) operations, purchasing stickers, etc.
+
+# Utility Functions
+- `IsCollectiblesTransfer()`: Checks if the transaction involves ERC721 or ERC1155 collectibles.
+- `FetchPrices()`: Fetches current token prices from a market manager service.
+- `FindToken()`: Finds a token within a given blockchain network, handling both ERC20 tokens and collectibles.
+- `isAvailableBetween()`: Checks if a certain transaction type is permissible between two networks.
+- `EstimateGas()`: Estimates the gas required for transactions such as ENS registrations or transfers.
+
+# Structs
+- `Node` and `Graph`
+  - Are used for constructing a graph of potential transaction paths, representing routes for transferring tokens across networks.
+- `Path`
+  - Represents a transaction path including details like from/to networks, fees, and estimated costs.
+- `Router`
+  - Manages routing of transactions using different bridges defined for various transaction types.
+  - **Functions:**
+    - `requireApproval()`
+      - Determines if token approval is required before executing a transaction over a bridge.
+    - `getBalance()` and `getERC1155Balance()`
+      - Fetch balance of ERC20 or ERC1155 tokens respectively.
+    - `suggestedRoutes()`
+      - Suggests possible transaction routes based on constraints like disabled or preferred chain IDs, and calculates fees and estimated transaction times.
+
+# Transaction Handling
+- The code handles transactions through various bridges which abstract the different transaction types.
+  - e.g. simple transfers, ERC721, ERC1155, and cross-chain transfers.
+  - TODO need to explore down this route
+- A method for calculating optimal transaction routes (`suggestedRoutes`) evaluates multiple paths, considering various factors like fees, token prices, and network constraints.
+  - TODO need to explore down this route
+
+# Error Handling and Data Integrity
+- There is significant error handling to ensure that only valid transactions are processed.
+  - For example, when finding tokens or fetching prices, errors lead to early termination with descriptive messages.
+- Use of concurrency (`sync.Mutex`, `async.NewAtomicGroup`) suggests an approach of handling multiple transactions or operations concurrently.
+  - TODO need to explore more on this.
+
+# Observations and Potential Improvements
+- Error Reporting:
+  - Detailed errors and/or logging could help with debugging.
+- Optimisation:
+  - The graph-building and route optimisation process could potentially be optimised for performance, especially when dealing with a large number of possible paths.
+  - Knapsack, mD Knapsack, Travelling Salesman
+  - TODO need to explore more on this.
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