EVM 101 — XRPL-EVM Sidechain · Lesson 4 of 5

Bridging XRP between mainnet and sidechain

4 min · read

The XRPL-EVM sidechain uses XRP as its native gas token, but the XRP on the sidechain is a separate asset from the XRP on XRPL mainnet. They're convertible 1:1 via a bridge — but understanding the mechanics protects you.

The native bridge

Ripple operates a 3-of-5 multisig that controls bridging in both directions. The flow:

XRPL → XRPL-EVM (wrap)

  1. You send XRP to the bridge's XRPL custodian account
  2. After XRPL finality (~3 seconds), the bridge validator set observes the inbound transfer
  3. The validator set's multisig signs an attestation
  4. The bridge contract on the sidechain mints an equivalent amount of sidechain-XRP to your EVM address
  5. Total wall-clock time: ~10-15 seconds

XRPL-EVM → XRPL (unwrap)

  1. You send sidechain-XRP to the bridge contract on the EVM side
  2. The contract burns the tokens
  3. The validator set signs a release attestation
  4. Ripple's mainnet multisig releases the locked XRP to your XRPL address
  5. Total wall-clock time: ~10-15 seconds (similar)

The trust model

The bridge is trust-minimised but not trustless. You trust:

  • The 3-of-5 multisig signers will not collude or be compromised
  • The validator-set rotation process is auditable
  • The wrapped-XRP supply on the sidechain exactly matches the locked XRP on mainnet (verifiable on-chain at any time)

This is stronger than most cross-ecosystem bridges (Wormhole, Multichain, etc.) because Ripple operates both endpoints. There's no foreign validator set to compromise.

Bridge UI in the Gopnik wallet

The wallet presents bridging as a picker with three slots:

Slot 1 (Native) Slot 2 (Axelar) Slot 3 (LayerZero)
★ Recommended for XRPL ↔ XRPL-EVM Coming soon Coming soon
3-of-5 multisig 60+ validators DVN + relayer
~10s finality ~18s ~4s
€0 fee
Up to €1M liquidity

In iteration A only the Native route is active. Slots 2 and 3 light up when iteration B adds Ethereum L1 + L2 bridge routes via Axelar and LayerZero respectively.

Famous bridge hacks — pattern recognition

Bridges are the #1 most-attacked surface in crypto. The pattern is almost always the same: validator-set or multisig compromise.

  • Ronin (2022, $625M) — 5 of 9 validators were the same actor; attacker stole 4 keys
  • Wormhole (2022, $320M) — signature-verification bug in the Solana program; attacker minted unauthorised wrapped ETH
  • Nomad (2022, $190M) — initialisation bug allowed anyone to prove any message; copycat exploiters drained it block-by-block
  • Multichain (2023, $130M) — operator-side opacity; funds moved before the CEO was arrested

The XRPL-EVM native bridge is purpose-built and Ripple-operated, but no bridge is risk-free. Treat bridged XRP as an asset class with slightly different risk than mainnet XRP — because that's what it is.