ID20

ID20 tokens are ERC20 wrappers around a single Ledger ERC1155 tranche id. They enable DEX and LP composability while preserving 1:1 backing semantics.

Purpose

• Fungible ERC20 interface for tranche ownership
• Attach Id20Gauge reward streaming
• Integrate with CL pools (avBTCm, avMEZOm)

Wrapping

ERC1155 safeTransferFrom into the ID20 contract mints ERC20 to the recipient (optional 32-byte recipient data). Emits WrappedFromReceived.

Unwrapping

function unwrap(uint256 amount, address to) external returns (uint256 burned);

Burns ERC20 and transfers underlying ERC1155 to to. Emits Unwrapped.

Backing model

• Invariant: totalSupply() ≤ backingBalance()
• surplusBacking() — excess ERC1155 held beyond totalSupply
• isFullyBacked() — view helper
• Reverts with Underbacked if the invariant would break

Live testnet tokens

• avBTCmId20 — 0x185E70EbFB606Ea8F3365A2952AD3aA677210366
• avMEZOmId20 — 0x99DBba550D4bFD8c83fFaE9711b243B5ef6Ef082