> ## Documentation Index
> Fetch the complete documentation index at: https://docs.echo.xyz/llms.txt
> Use this file to discover all available pages before exploring further.
# Configuration Options
> All the options available when setting up your token sale
## Overview
Sonar provides extensive configuration options to customize your sale. These are configured in the [Echo Founder Dashboard](https://app.echo.xyz/founder) before your sale launches.
***
## Offered Token
The "offered token" is the token that will be sold in the sale.
| Parameter | Description |
| ---------------- | ------------------------------------------------------------------------------------------------------------------ |
| **Total amount** | The total amount of tokens to be sold in the sale (the user representation - i.e. `totalUnitAmount / 10^decimals`) |
| **Decimals** | The number of [decimals](https://eips.ethereum.org/EIPS/eip-20#decimals) of the token |
## Sale Timeline
| Option | Description |
| ---------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- |
| **Registration opens** | When investors can begin setting up their Sonar entities and verifying eligibility. Investors can register until the commitment period ends. |
| **Commitment start** | When the commitment phase begins and investors can submit commitments |
| **Commitment end** | When the commitment period automatically ends |
Note that there are other phases like "cancellation" and "settlement" that you will transition to manually. You can read more about the complete sale lifecycle on the [Sale Lifecycle](/sonar/planning/sale-lifecycle) page.
## Chain & payment tokens
| Option | Description |
| ------------------ | ------------------------------------------------------------------------------------------------------------------------------------ |
| **Chain** | Which chain the sale runs on. A sale runs on a single chain, accepting payments across multiple chains in one sale is not supported. |
| **Payment tokens** | Which tokens can be used for payment (e.g., USDC, USDT, or other ERC-20 tokens) |
Sonar supports both EVM and SVM chains. Currently supported chains include Ethereum, Base, and [Monad](https://monad.xyz) (EVM), and Solana (SVM). Monad is the most recent addition.
Payment tokens vary by chain. On Monad, the available payment tokens are:
| Network | Payment tokens |
| ----------- | -------------- |
| **Mainnet** | USDC and USDT0 |
| **Testnet** | USDC only |
Contact [support@echo.xyz](mailto:support@echo.xyz) for specific network availability.
## Sale Mechanics
Choose how your token price is determined: [fixed price](/sonar/planning/pricing-strategies#fixed-price-sale) or [English auction](/sonar/planning/pricing-strategies#english-auction). Each strategy has its own price parameters configured in the Founder Dashboard.
See [Pricing Strategies](/sonar/planning/pricing-strategies) for details on each option and its configuration.
## Enhanced Security
| Option | Description |
| ----------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------- |
| **Facial recognition on suspected fraud** | When enabled, investors flagged for possible fraud are required to pass a facial recognition (liveness) check at the time of purchase |
## Contract Addresses
| Option | Description |
| ----------------------------- | ------------------------------------------------------------------------------------------------------------------- |
| **Proceeds receiver address** | The destination wallet for all accepted commitments. After settlement, sale proceeds are withdrawn to this address. |
| **Contract admin address** | The wallet that will have full administrative access (`DEFAULT_ADMIN_ROLE`) to your sale contract. |
See [Roles & Permissions](/sonar/reference/contracts/settlement-sale#roles--permissions) for details on the admin role and other contract roles.
## Commitment Limits
Limits are enforced at the entity level, not the wallet level—so a participant can't circumvent limits by using multiple wallets.
| Parameter | Description |
| ---------------------- | --------------------------------------------------------------------------------------- |
| **Minimum commitment** | Smallest amount an entity can commit (e.g., \$100) |
| **Maximum commitment** | Largest amount an entity can commit—use this as a whale cap to limit large participants |
See [Purchase Permits](/sonar/core-features/purchase-permits) for implementation details on how limits are enforced.
## Compliance Options
### Geographic Restrictions
| Option | Description |
| ------------------------- | ------------------------------------------------------------------------------------ |
| **Blocked jurisdictions** | Countries where participation is not allowed (e.g., sanctioned countries, OFAC list) |
### Wallet Screening
| Option | Description |
| ------------------------- | ---------------------------------------------------------------- |
| **Wallet risk screening** | Screen wallets for risk indicators before allowing participation |
You can configure thresholds for direct and indirect exposure to flagged addresses.
See [Wallet Risk Screening](/sonar/planning/wallet-risk-screening) for details on risk groups and configuration.
### US Participants
| Option | Description |
| ---------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------- |
| **US accreditation checks** | Verification that US participants meet accredited investor requirements (including option for on-chain net worth checks) |
| **Forced lockup for US investors** | When enabled, US investors are required to lock up their tokens for a period of time. See [Lockup & Vesting](/sonar/planning/lockup-vesting) for details. |
## Advanced
| Option | Description |
| -------------------- | ---------------------------------------------------------------------------------------------------------------- |
| **Custom contracts** | For unique requirements, Sonar can support custom smart contract implementations tailored to your specific needs |
## Next Steps
Begin your technical integration
Understand the end-to-end sale process