Listing PCN

Everything needed to review, integrate and list PCoin, in one page — including the two things that will otherwise cost you a day.

1What PCN is

PCoin is an independent Layer 1 blockchain — its own genesis block, network magic, ports, address prefixes and UTXO set. It is not a token, not an ERC-20, not a sidechain, and it settles on nobody else's chain. It is a fork of the Bitcoin Core v29.4 codebase with proof-of-work replaced by RandomX (CPU-mined, ASIC-resistant) and the difficulty algorithm replaced by LWMA.

Practically, that means your existing Bitcoin integration works. The RPC surface, the wallet semantics, the binaries' names and the config file format are upstream Core. What differs is listed below, and nothing else does.

2Issuance: no premine, no ICO, no tax

• No premine and no presale. Every PCN in existence was mined, starting from the genesis block under the same rules that apply today.
• No ICO, past or running. There has never been a token generation event.
• No transfer tax, and none is possible. This is a UTXO chain running Bitcoin's consensus rules; there is no contract and no hook that could take a cut of a transfer. There is nothing to change post-listing.
• No admin keys, no mint function, no pause. Supply is fixed by consensus.

market.pc.am sells PCN from the project treasury at a published price. Those are already-mined coins being sold by a holder, not an issuance — no new supply is created and the 21 M cap is untouched.

3Running a node

The binaries keep their upstream names — bitcoind and bitcoin-cli. Only the data directory (~/.pcoin) and the config file name (pcoin.conf) are renamed. If the host also runs Bitcoin, always pass -datadir explicitly.

Downloads and checksums: pc.am/download · GitHub releases

Minimum config

server=1
txindex=1              # you will want it; the node has no address index either way
fallbackfee=0.00001    # MANDATORY -- without it every send fails
changetype=bech32      # native SegWit change, matching the receive addresses
rpcauth=...            # per upstream; RPC binds loopback by default

4Addresses

Validate with the node, never a regex. validateaddress is authoritative and costs nothing. Lowercase bech32 before you compare or store it.

PCoin kept Bitcoin's BIP32 version bytes, so PCoin extended keys serialise as literal xprv…/xpub… and a Bitcoin xprv will parse in a PCoin descriptor. Coin type 9444' is the only thing keeping the two key trees apart — do not normalise it to 0'.

5Deposits

• 3 confirmations for ordinary deposits; 100 for coinbase outputs, which is consensus and not negotiable.
• Key your ledger on (txid, address), never (txid, vout). Deposit vout is routinely 0, so the wrong key silently drops a second deposit instead of erroring. Every integration that got this wrong got it wrong this way.
• Gate on the deposit's own block height, not on the tip minus a constant.
• A failed or timed-out read resolves nothing. An errored explorer call is not "no payment"; an unreadable rate is not a rate of zero. Hold — never credit, never reject.

6Withdrawals

Ordinary Core: sendtoaddress, sendmany, walletcreatefundedpsbt. Two settings decide whether they work at all:

• fallbackfee=0.00001 — see the top of this page. There is no fee market to estimate from, so without a fallback the wallet cannot build any transaction.
• changetype=bech32 — a wallet holding only wpkh descriptors cannot allocate taproot change, so a send to a pc1p… address fails at the change step without it.

Blocks are not full and fees are a dust formality; the fallback rate above confirms reliably.

7What the node does not give you

Stated plainly, so it is not a discovery on day three.

• No ZMQ. Not compiled into the published binaries — getzmqnotifications returns -32601. The source is present; ask and we will publish a -DWITH_ZMQ=ON build. Until then, poll getbestblockhash.
• No address index. Same as Bitcoin Core: the chainstate is keyed by outpoint with no reverse map, and txindex answers a different question. Use our explorer API, run ElectrumX, or watch addresses by importing descriptors into the wallet.
• Do not front scantxoutset with HTTP. It is globally serialised and O(UTXO set) per call.

8Verifying the software

• Source is public and complete: github.com/pars5555/pcoin. The diff against upstream v29.4 is git diff v29.4..HEAD and is small enough to read end to end.
• The consensus surface is four files: src/pow.cpp, src/crypto/pow_randomx.*, src/kernel/chainparams.cpp, src/validation.cpp.
• RandomX is a vendored copy of tevador/RandomX carrying exactly one local change: 14 lines in src/randomx/src/allocator.cpp adding optional large-page allocation. Nothing on the hash-computation path is touched, and git log -- src/randomx/ shows the whole history in three commits.
• Build it yourself: cmake -B build -DBUILD_GUI=OFF -DENABLE_WALLET=ON -DCMAKE_BUILD_TYPE=Release — stock Core dependencies, no vendored toolchain.
• Every release ships a SHA256SUMS; the same list is mirrored at pc.am/dl/SHA256SUMS.txt.
• Binaries are not code-signed. Windows SmartScreen warns about anything it has not seen widely downloaded, independently of content.

9Live endpoints

10Community and contact

For a listing review, a test build, a ZMQ-enabled binary or testnet coins, open an issue or ask in @PCoinPCNChat.