🗒️9.5.1 Buy Guide

Security warning: Never trust contract addresses from random chats, comments, DMs, or screenshots. Always verify addresses using official EOSI Finance channels before sending funds. Crypto transactions are irreversible.

Verification scope (writer-quality note):

1. This guide is aligned to the buy flow behavior.

2. Wallet UI labels can change by wallet version and device OS.

3. If a button label differs slightly in your wallet, follow the same intent shown in each step.

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Quick Start (Experienced Users)

1. Install Phantom, Uniswap Wallet, or Trust Wallet.

2. Switch to Polygon Network (Chain ID 137).

3. Fund wallet with POL, USDT, or USDC on Polygon Network.

4. Keep at least 10 POL for gas buffer.

5. Open official EOSI Finance presale URL: https://ico.eosifinance.org.

6. Accept Terms and pass eligibility checks.

7. Optional: apply 10-character referral code.

8. Choose payment token and deposit amount.

9. Confirm transaction:

   • POL: one contribution transaction

   • USDT/USDC: approval then contribution

10. Verify tx hash on Polygonscan.

11. Import EOSIF using official token contract when published.

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1) Before You Start

This guide covers the full purchase journey for EOSIF on Polygon Network.

Recommended wallets in this guide:

1. Phantom

2. Uniswap Wallet

3. Trust Wallet

Other wallets are also supported in this dApp (for example MetaMask, SafePal, Coinbase Wallet, Rainbow), but the recommended choices for this guide are the three wallets above.

Supported payment assets in this dApp strictly under Polygon Network

1. POL

2. USDT (Polygon)

3. USDC (Polygon)

Network required

1. Polygon Mainnet (Chain ID 137)

Regional eligibility note

1. The app can enforce location eligibility checks at access time.

2. Restricted locations are blocked from participating.

3. Even if you can connect a wallet, policy checks may still block purchase.

Referral code note

1. Referral code is optional.

2. Code format in this app: exactly 10 characters.

3. Codes are validated on-chain before application.

What you need before buying

1. A wallet installed (recommended: Phantom, Uniswap Wallet, or Trust Wallet).

2. Wallet funded on Polygon Network with one of: POL, USDT, USDC.

3. Extra POL for network fees (keep at least 10 POL buffer).

4. Access to the official EOSI Finance sale URL: https://ico.eosifinance.org.

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2) Official Contract and Network Details

Use these values during setup, verification, and token checks.

Payment token contracts

1. USDC on Polygon:

   • 0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359

2. USDT on Polygon:

   • 0xc2132D05D31c914a87C6611C10748AEb04B58e8F

Polygon network fields

1. Network name: Polygon Mainnet

2. Chain ID: 137

3. Native currency symbol: POL (formerly MATIC)

4. Block explorer: https://polygonscan.com

5. RPC guidance:

   • Prefer wallet default Polygon RPC.

   • If you add a custom RPC, only use trusted providers.

   • Do not use unknown public RPC endpoints from untrusted sources.

In-app purchase behavior to know

1. Public sale pricing in UI is shown as 1 EOSIF = $0.75.

2. POL route is a single contribution transaction.

3. USDT/USDC route can be two transactions:

   • Approval (if allowance is not enough)

   • Contribution

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3) Universal Security Setup (All Wallets)

Complete these steps before any funding or purchases.

1. Install wallet only from official app stores or official extension stores.

2. Create a new wallet or import existing seed phrase.

3. Back up seed phrase offline:

   • Write it on paper.

   • Store in at least two secure locations.

   • Do not store in cloud notes, screenshots, or chat.

4. Set app/device security:

   • Enable PIN/passcode.

   • Enable biometric lock if available.

   • Enable wallet auto-lock timer.

5. Harden your device:

   • Keep OS/browser updated.

   • Avoid unknown extensions/plugins.

   • Use a clean browser profile for crypto.

6. Run a small test transfer first before moving larger funds.

7. Confirm every transaction in wallet:

   • Network (must be Polygon)

   • Destination/contract

   • Amount

   • Estimated gas fee

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4) Wallet Setup: Phantom

Important: Phantom supports multiple ecosystems. For this purchase flow, use Phantom EVM account on Polygon Network.

A) Desktop (browser extension)

1. Install Phantom extension from official browser store listing.

2. Open Phantom and create/import wallet.

3. Secure recovery phrase and set lock settings.

4. In Phantom settings:

   • Enable EVM networks/accounts if disabled.

   • Confirm Polygon is available in supported networks.

5. Open the official EOSI Finance sale page: https://ico.eosifinance.org.

6. Click Connect Wallet.

7. Select Phantom if shown.

8. Approve connection request in Phantom popup.

Expected wallet prompt:

1. Connect approval to site.

2. Optional Switch Network approval to Polygon if wallet is on another network.

B) Mobile (Phantom app)

1. Install Phantom mobile app from official app store.

2. Create/import wallet and secure it.

3. Ensure EVM account is active and Polygon is available.

4. Open sale page using:

   • In-app browser inside Phantom, or

   • External browser with WalletConnect/hand-off flow.

5. Tap Connect Wallet on dApp.

6. Approve wallet connection.

7. Approve network switch if prompted.

Expected wallet prompt:

1. Site connection approval.

2. Network switch to Polygon.

C) Phantom readiness checklist

1. Wallet connected in site header and buy panel.

2. Active chain is Polygon.

3. You can see POL balance in wallet.

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5) Wallet Setup: Uniswap Wallet

A) Desktop (extension)

1. Install Uniswap Wallet extension from official source.

2. Create/import wallet and secure recovery phrase.

3. Open network selector and choose Polygon.

4. Open official EOSI Finance sale page: https://ico.eosifinance.org.

5. Click Connect Wallet.

6. Select Uniswap Wallet.

7. Approve dApp connection.

8. Approve switch to Polygon if prompted.

Expected wallet prompt:

1. Connect permission.

2. Switch network to Polygon.

B) Mobile (Uniswap Wallet app)

1. Install Uniswap Wallet mobile app.

2. Create/import wallet and secure it.

3. Open app browser or WalletConnect flow to official sale page.

4. Tap Connect Wallet.

5. Approve connection.

6. Confirm Polygon network.

Expected wallet prompt:

1. Wallet connection approval.

2. Network confirmation/switch.

C) Uniswap Wallet readiness checklist

1. Connected status is visible on dApp.

2. Chain shows Polygon.

3. Funding asset (POL/USDT/USDC) is present.

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6) Wallet Setup: Trust Wallet

Trust Wallet is typically mobile-first, but extension flows can also be used where available.

A) Mobile (recommended)

1. Install Trust Wallet app from official app store listing.

2. Create/import wallet and back up recovery phrase.

3. Enable security lock and biometrics.

4. Ensure Polygon network assets are visible:

   • POL

   • USDT (Polygon)

   • USDC (Polygon)

5. Open official EOSI Finance sale page: https://ico.eosifinance.org

   • In Trust Wallet browser if available, or

   • External browser + wallet hand-off flow.

6. Tap Connect Wallet and select Trust Wallet.

7. Approve connection and network switch.

Expected wallet prompt:

1. dApp connection approval.

2. Switch to Polygon (if not already on Polygon).

B) Desktop extension (if used)

1. Install Trust Wallet browser extension.

2. Import/create wallet and secure it.

3. Set network to Polygon.

4. Open EOSI Finance sale page and connect.

5. Approve all wallet prompts.

Expected wallet prompt:

1. Connection permission.

2. Polygon network switch.

C) Trust Wallet readiness checklist

1. dApp shows wallet as connected.

2. Active network is Polygon.

3. You have purchase asset plus extra POL for gas.

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7) Funding Your Wallet

You can fund using a centralized exchange withdrawal or a bridge.

A) Method A: Buy on CEX then withdraw directly to Polygon (recommended)

1. Buy one of:

   • POL

   • USDT

   • USDC

2. Open withdraw page on exchange.

3. Paste your wallet receive address.

4. Select withdrawal network:

   • Must be Polygon (not Ethereum mainnet, not BSC, not Tron).

5. Send a small test amount first.

6. Wait for confirmations.

7. Confirm funds received in wallet.

Critical checks:

1. Wrong network withdrawal can permanently lose funds.

2. USDT and USDC contracts are network-specific.

B) Method B: Bridge from another chain

1. Use a trusted bridge only.

2. Connect source wallet and destination wallet.

3. Select token and amount.

4. Destination chain must be Polygon.

5. Approve bridge transaction and wait for completion.

6. Verify funds arrived on Polygon.

Bridge risk warning:

1. Bridges introduce smart contract and route risk.

2. Always test with a small amount first.

C) Keep POL gas reserve

1. Keep at least 10 POL as gas buffer.

2. Even when paying with USDT/USDC, you still need POL for transaction fees.

3. If gasless mode is ever enabled by project settings, still keep POL as fallback.

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8) Buy EOSIF in the dApp

Follow this sequence exactly.

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Step 1: Open official sale page

1. Use only official EOSI Finance link: https://ico.eosifinance.org.

2. Do not use cloned links from social replies or ads.

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Step 2: Accept Terms and pass eligibility gate

1. Read Terms modal.

2. Click AGREE.

3. App performs location eligibility check.

4. If blocked, purchase cannot proceed.

Expected result:

1. Modal closes and main buy page is accessible.

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Step 3: Optional referral code application

1. In Referral Access, enter code (10 characters).

2. Wait for on-chain validation.

3. Click Apply Referral Code once valid.

Expected status messages:

1. Checking code on blockchain...

2. Valid: code marked ready to apply.

3. Invalid states: not found, paused, blacklisted, inactive.

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Step 4: Connect wallet and confirm Polygon

1. Click Connect Wallet.

2. Recommended wallet choices: Phantom / Uniswap Wallet / Trust Wallet.

3. Other supported wallets can also be used (for example MetaMask, SafePal, Coinbase Wallet, Rabby, Rainbow).

4. Approve connection in wallet.

5. Approve network switch to Polygon if prompted.

Expected wallet prompt:

1. Connect permission.

2. Switch chain to Polygon.

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Step 5: Choose payment token and amount

1. In Select Payment Token, choose:

   • POL

   • USDT

   • USDC

2. Enter deposit amount in Deposit field.

3. Review Estimated Tokens.

Notes:

1. App displays estimated EOSIF based on current pricing logic.

2. POL route also shows POL/USD feed status.

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Step 6: Execute transaction flow by token

A) POL path (single transaction)

1. Click Buy Token With POL.

2. Wallet opens one transaction prompt.

3. Review:

   • Network: Polygon

   • Value (POL amount)

   • Gas fee

4. Confirm transaction.

5. Wait for on-chain confirmation.

Expected wallet prompt:

1. One contribution transaction confirmation.

B) USDT/USDC path (approval + contribution)

1. Click buy button for selected stablecoin.

2. If allowance is insufficient, wallet shows Approve transaction first.

3. Confirm approval.

4. After approval confirms, wallet shows purchase contribution transaction.

5. Confirm contribution.

6. Wait for completion.

Expected wallet prompt:

1. Approval transaction (may occur only first time or when allowance is low).

2. Contribution transaction.

Important behavior:

1. Approval and purchase are separate operations.

2. If approval succeeds but contribution fails, you usually do not need to approve again immediately.

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Step 7: Confirm successful purchase

1. App should show purchase success feedback.

2. Save transaction hash from wallet for your records.

3. Verify on Polygonscan (see Appendix).

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9) Import EOSIF Token to Wallet

After buying, add EOSIF as a custom token so it appears in wallet UI.

Critical address note

Use this placeholder until official EOSIF token contract is confirmed:

1. EOSIF token address (Polygon): 0xREPLACE_WITH_OFFICIAL_EOSIF_TOKEN_ADDRESS

The string below is not a valid EVM contract address and will fail import in EVM wallets:

1. 0xREPLACE_WITH_OFFICIAL_EOSIF_TOKEN_ADDRESS

Reason:

1. EVM token contracts must be 42 characters total and hex-formatted as 0x + 40 hex characters.

A) Phantom token import (desktop/mobile)

1. Open token management.

2. Choose add/import custom token.

3. Select network: Polygon.

4. Paste EOSIF token contract address.

5. If symbol/decimals autofill, verify and confirm.

6. If not autofilled, enter verified symbol/decimals manually from official source.

7. Save token.

B) Uniswap Wallet token import (desktop/mobile)

1. Open token list.

2. Select import token/custom token.

3. Ensure network is Polygon.

4. Paste EOSIF token contract address.

5. Review token metadata.

6. Confirm import.

C) Trust Wallet token import (mobile/extension)

1. Open token list and tap add token.

2. Choose custom token.

3. Set network to Polygon.

4. Paste EOSIF token contract address.

5. Enter symbol and decimals if required.

6. Save and enable display.

If symbol/decimals are unknown

1. Check official EOSI token publication.

2. Verify on Polygonscan token contract page.

3. Confirm symbol() and decimals() from verified contract data.

4. Do not guess token metadata.

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10) Common Errors and Fixes

1) Wrong network

Symptoms:

1. Buy button fails or wallet rejects.

2. App asks to switch network repeatedly.

Fix:

1. Switch wallet to Polygon Mainnet (chain ID 137).

2. Reconnect wallet to dApp.

2) Insufficient balance

Symptoms:

1. Error says not enough POL/USDT/USDC.

2. Purchase cannot submit.

Fix:

1. Fund wallet with selected payment asset.

2. Keep extra POL for gas (10 POL minimum recommended buffer).

3) Approval issues (USDT/USDC)

Symptoms:

1. Approval fails.

2. Purchase says allowance too low.

Fix:

1. Retry approval and ensure you confirm in wallet.

2. Wait for approval confirmation before purchase retry.

3. Verify correct token and network.

4) User rejected transaction

Symptoms:

1. Wallet popup closed or declined.

Fix:

1. Start buy flow again.

2. Confirm transaction in wallet when prompted.

5) RPC/network instability

Symptoms:

1. Timeout, failed fetch, 429/503 style errors.

Fix:

1. Wait and retry.

2. Switch RPC in wallet to a trusted endpoint if needed.

3. Keep wallet and browser/app updated.

6) Wallet extension conflicts

Symptoms:

1. Random connection failures.

2. Wrong extension intercepts requests.

Fix:

1. Disable extra wallet extensions temporarily.

2. Use a clean browser profile with only one active wallet extension.

3. Reopen dApp and reconnect.

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11) Final Safety Checklist Before Confirming

Review all items before signing any wallet request:

1. I am on official EOSI Finance sale URL.

   • https://ico.eosifinance.org

2. My wallet network is Polygon.

3. I selected the intended payment token.

4. Deposit amount is correct.

5. I kept enough POL for gas.

6. Contract interaction is expected for EOSIF purchase.

7. I reviewed gas fee and transaction details.

8. I understand transactions cannot be reversed.

If any item is unclear, cancel and verify before proceeding.

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12) Appendix

A) Verify transaction on Polygonscan

1. Copy transaction hash from wallet activity.

2. Go to https://polygonscan.com.

3. Paste hash in search bar.

4. Confirm:

   • Status: Success

   • From: your wallet

   • To: expected contract

   • Token/value details

B) Expected contract method patterns (advanced verification)

Depending on token path, the app triggers:

1. POL purchase path:

   • contributePOL(string referralCode) with payable value

2. USDT purchase path:

   • approve(spender, amount) (if needed)

   • contributeUSDT(uint256 amount, string referralCode)

3. USDC purchase path:

   • approve(spender, amount) (if needed)

   • contributeUSDCNative(uint256 amount, string referralCode)

C) Support escalation checklist (send this to support)

When requesting help, provide:

1. Wallet type and version (Phantom/Uniswap Wallet/Trust Wallet).

2. Device and OS.

3. Browser and version (if desktop).

4. Network selected in wallet.

5. Payment token used.

6. Deposit amount.

7. Transaction hash (or both hashes for approval + contribution).

8. Exact error text and screenshot.

9. Approximate timestamp and timezone.

10. Whether referral code was used.

D) Quick reminder on EOSIF import address

1. Do not import EOSIF with 0XCHd54CFGHH7DVV557GVFCDDG7FHH6GKLO.

2. Wait for verified Polygon contract and use:

   • 0xREPLACE_WITH_OFFICIAL_EOSIF_TOKEN_ADDRESS