Secure Your Tokens
Your mining phone should never hold valuable tokens. Here's how to set up a secure savings wallet so your POH goes straight to cold storage.
Smart Contract Security
All POH smart contracts are built on OpenZeppelin v5 battle-tested contracts and have passed two independent static analysis tools with zero critical or high-severity findings:
Slither Analysis
Automated static analysis by Trail of Bits. No critical or high-severity vulnerabilities detected across all 7 contracts.
Mythril Analysis
Symbolic execution engine by ConsenSys. Zero issues detected across all 7 contracts. Checks for reentrancy, integer overflow, and more.
Source code is open source at github.com/chatde/poh-coin. All contracts are deployed and verified on Base mainnet.
Verified Contracts on Basescan
| Contract | Address |
|---|---|
| POHToken | 0x280Ddb8b67Ad8cf791D370FE59227d19e989Fb07 |
| POHCharity | 0xf9eDc5CF986ea637E724E078DA01AbD7c4957D49 |
| POHVesting | 0xFfce548EbF097F630A272aA577E750A0Bc1308dd |
| POHRewards | 0xa7904Cb5f3D6a937Db06453e3d95db4f0C3236dF |
| POHNodeRegistry | 0x8137a04a50C058b00d9ee44D25b9Ef1ba900D15F |
| TimelockController | 0x64981B544a20d6933466c363dD175cA1FaD96Bb6 |
| POHGovernor | 0x7C96Ed675033F15a53557f1d0190e00B19522e6e |
All contracts are verified on Basescan. Click any address to view the full source code on-chain.
Important
Your mining phone's wallet (hot wallet) is exposed to the internet and vulnerable to theft. Never store large amounts of POH on it. Always set up a savings wallet.
Step 1: Get a Hardware Wallet
A hardware wallet (like Ledger Nano S/X) stores your private keys offline. It's the safest way to hold crypto.
- 1.Purchase a hardware wallet directly from the manufacturer (never secondhand)
- 2.Set it up following the manufacturer's instructions
- 3.Write down your 24-word seed phrase on paper. Never digitally.
- 4.Add the Base network to your hardware wallet
Don't have a hardware wallet? A separate phone (kept offline) or a MetaMask on a computer you don't carry around also works as an intermediate solution.
Step 2: Set Your Savings Wallet in POH
Tell the POH mining system to send all claimed rewards directly to your hardware wallet address.
- 1.Open the mining dashboard at /mine
- 2.During setup, enter your hardware wallet address as the "Savings Wallet"
- 3.When you claim rewards, tokens go directly to your hardware wallet
- 4.Your mining phone never touches the POH — it just proves your compute work
Step 3: How Claiming Works
Each week, the Proof of Planet system calculates your rewards and creates a merkle proof. Here's the flow:
Step 4: Understanding Vesting
To protect the network, rewards are partially vested based on your mining history:
New Miners (< 6 months)
- 25% immediate to savings wallet
- 75% vests over 180 days
- After 180 days, claim the rest
Veterans (6+ months)
- 75% immediate to savings wallet
- 25% vests over 30 days
- After 30 days, claim the rest
Vested tokens are locked in the smart contract and released automatically after the vesting period. You call releaseVested() to claim them.