MotaCoin

Abstract

MotaCoin (MOTA) is a Proof-of-Stake cryptocurrency built on a Bitcoin-derived codebase (Bitcoin → Peercoin → NovaCoin → MotaCoin). Originally founded in 2014 and relaunched with a new genesis in March 2018, it features X13 proof-of-work hashing for the initial distribution phase, a full transition to pure Proof-of-Stake at block 978,420, 4.20% annual staking rewards, and a 125 million fixed supply.

Version 2.0.1 introduces the Snapback Recovery Protocol — a chain-level rollback mechanism that recovered the network from a consensus fault, redistributed 25 million MOTA to affected users, and upgraded the economic model in a single coordinated hard fork. It also adds a native Solana bridge via an inverted escrow architecture: all 125 million MOTA SPL tokens were pre-minted on Solana with mint authority permanently revoked.

The chain is live and operational, with staking nodes running on dedicated hardware, a block explorer at explorer.motacoin.net, and 35 custom RPC commands for staking management, bridge operations, coin control, and chain analytics.

2. X13 Hashing Algorithm

MotaCoin uses the X13 hashing algorithm for its Proof-of-Work phase — a chained sequence of 13 cryptographic hash functions applied in series:

Blake → BMW → Groestl → Skein → JH → Keccak → Luffa →
CubeHash → Shavite → SIMD → Echo → Hamsi → Fugue

Each function processes the output of the previous one, producing a final 256-bit hash. This multi-algorithm approach provides resistance against ASIC optimization and ensures broad cryptographic diversity — even if one algorithm is compromised, the remaining twelve maintain security.

After block 978,420, the chain transitioned to pure Proof-of-Stake and X13 is no longer used for block production. The stake kernel uses SHA-256d, the same hash function used by Bitcoin for its Proof-of-Work.

4. Proof-of-Stake Consensus

MotaCoin uses a HyperStake-derived Proof-of-Stake kernel, inherited through the Peercoin → NovaCoin lineage. After block 978,420, the chain is pure PoS — no Proof-of-Work blocks are accepted.

4.1 Kernel Parameters

4.2 Kernel Hash Formula

hash = SHA256d(nStakeModifier + blockFrom.nTime + txPrev.offset
             + txPrev.nTime + txPrev.vout.n + nTimeTx)

hash < bnTargetPerCoinDay × nCoinDayWeight

nCoinDayWeight = nValueIn × nTimeWeight / COIN / 86400

A UTXO successfully stakes when the kernel hash is below the target difficulty weighted by the coin's age and value. Larger, older UTXOs are proportionally more likely to find valid stakes.

4.3 Difficulty Adjustment

Difficulty adjusts every block using an exponential moving average, preventing runaway difficulty swings while keeping block times close to the 258-second target.

4.4 Stake For Charity / MultiSend

$ MotaCoind stakeforcharity add "McharityAddress..." 10
# Automatically sends 10% of every stake reward to the charity address

$ MotaCoind multisend "MpayrollAddress..." 25
# Auto-send 25% of every mature stake to the specified address

5.3 The reorganizetoheight RPC

The core recovery tool. Existing wallet users ran this command to roll their chain back to the safe point:

$ MotaCoind reorganizetoheight 1159000

# Disconnects all blocks above height 1,159,000
# Clears mempool, orphan pool, stale stake entries
# Chain continues from the safe point on new rules

5.4 Protocol Version Enforcement

After the snapback point, nodes running old software are automatically disconnected:

6. Solana Bridge

6.1 Inverted Escrow Architecture

MotaCoin's bridge uses an inverted escrow model. Unlike traditional bridges where mainchain coins sit in escrow and wrapped tokens are minted on demand, MotaCoin pre-minted all 125 million MOTA as a Solana SPL token with mint authority permanently revoked. The bridge releases SPL tokens when users deposit mainchain MOTA, and reclaims them when users bridge back.

6.2 SPL Token

6.4 Solana → MotaCoin

1. Send SPL MOTA to any bridge escrow wallet ATA with a memo containing your M-address
2. Solana watcher detects the transfer after 30 confirmations
3. Executor selects a best-fit escrow wallet using atomic SQLite locking
4. Bridge sends equivalent native MOTA to the user's mainchain address
5. 0.5% bridge fee deducted

7. Tor Integration

All MotaCoin staking nodes route P2P traffic through Tor using the SOCKS5 proxy at 127.0.0.1:9050. This hides the IP addresses of staking nodes from the P2P network, preventing targeted attacks against validators.

# Tor proxy configuration
proxy=127.0.0.1:9050
listen=1
discover=0

# Seed nodes (non-Tor for discoverability)
addnode=seeds.motacoin.net

9. RPC Command Reference

MotaCoin includes 35 custom RPC commands beyond the standard Bitcoin RPC set.

9.1 Staking Commands

9.2 Bridge Commands

9.3 Coin Control

9.4 Chain Analytics

9.5 Wallet Utilities

9.6 Chain Management