# Utils
Utility functions for blockchain operations, value conversion, and data handling.
## Conversion Functions
### to_wei
```rust
fn to_wei(amount: &str, decimals: U256) -> Result<String, Error>
```
Converts a decimal amount to wei based on token decimals.
```rust
let wei = to_wei("1.5", U256::from(18))?; // "1500000000000000000"
```
### wei_to_eth
```rust
fn wei_to_eth(wei: U256) -> f32
```
Converts wei amount to ETH with decimal precision.
```rust
let eth = wei_to_eth(U256::from(1500000000000000000)); // 1.5
```
## Blockchain Data Functions
### fetch_kuru_order_id
```rust
fn fetch_kuru_order_id(logs: &[Log]) -> U256
```
Extracts order ID from transaction logs (first value from first log).
### tx_hash_to_id
```rust
fn tx_hash_to_id(tx_hash: FixedBytes<32>) -> i32
```
Converts transaction hash to numeric ID using first 4 bytes.
## Solidity Type Conversion
### uint_to_dyn_sol_val
```rust
fn uint_to_dyn_sol_val(sol_type: &str, value: &str) -> DynSolValue
```
Converts string value to Solidity dynamic value type.
```rust
let value = uint_to_dyn_sol_val("uint40", "123");
```
### convert_dynsolvalue
```rust
fn convert_dynsolvalue<T>(value: &DynSolValue) -> Option<T>
where
T: TryFrom<DynSolValue>
```
Generic conversion from DynSolValue to target type. Supports:
- Uint (24, 40, 96, 256 bits)
- Address
- Bool
- Int256
- Bytes
- String
### convert_dynsolvalue_to_u96
```rust
fn convert_dynsolvalue_to_u96(value: &DynSolValue) -> Result<U96, Error>
```
Specialized conversion from DynSolValue to U96.
## Usage Examples
```rust
// Converting token amounts
let wei_amount = to_wei("1.5", U256::from(18))?;
let eth_amount = wei_to_eth(U256::from_str(&wei_amount)?);
// Working with transaction data
let order_id = fetch_kuru_order_id(&tx_receipt.logs);
let tx_id = tx_hash_to_id(tx_receipt.transaction_hash);
// Solidity type conversions
let sol_value = uint_to_dyn_sol_val("uint96", "1000000");
if let Some(value) = convert_dynsolvalue::<U96>(&sol_value) {
println!("Converted value: {}", value);
}
```
## Notes
- All amount conversions handle decimal precision
- Numeric conversions check for valid ranges
- DynSolValue conversions return None for incompatible types
- Wei/ETH conversions use 18 decimal places