Deprecated contracts still holding value

USDD (Decentralized USD)'s assessment for RD-F-166 — scored green on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

The 'Old USDD Token' (0x0C10bF8FcB7Bf5412187A595ab97a3609160b5c6) is labeled deprecated on Etherscan and superseded by the Sept-2025 native ERC-20 (0x8EbdcF3d843E3A96137E84117C7989C883cE6127). No evidence of material user TVL (>$100K) remaining in the deprecated contract. Migration to the native ERC-20 appears complete per The Block reporting and ChainSecurity fifth audit coverage of the new deployment.

Sources #

URL
USDD, the Justin Sun-Backed Stablecoin, Launches Natively on EthereumThe Block — USDD launches natively on Ethereum in September 2025, replacing the bridged representationretrieved 2026-05-17
Etherscan
Old USDD Token — EtherscanEtherscan label 'Old USDD Token' for 0x0C10bF8FcB7Bf5412187A595ab97a3609160b5c6 — deprecated ERC-20retrieved 2026-05-17

Methodology #

Determine whether contracts marked deprecated by a protocol announcement still hold >$100K in assets.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol usdd factor RD-F-166 score green collected_at 2026-05-17 11:34:18