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fix(docs): address decimal documentation feedback #451

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Feb 3, 2026
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fix(docs): address decimal documentation feedback #451

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19 changes: 10 additions & 9 deletions docs/core-concepts/decimals.mdx
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Expand Up @@ -17,25 +17,26 @@ Different chains use different decimal precisions for the same token. The bridge
| EVM | 18 |
| Solana | 9 |

For example, bridged tokens on NEAR keep their original decimals:
For example, bridged tokens keep their original decimals unless they exceed the chain maximum:

| Token | Ethereum | NEAR | Solana |
|-------|----------|------|--------|
| USDC | 6 decimals | 6 decimals | 6 decimals |
| WETH | 18 decimals | 18 decimals | 8 decimals (capped from 18) |
| wNEAR | 24 decimals | 24 decimals | 9 decimals (capped from 24) |
| Token | Origin | NEAR | Solana |
|-------|--------|------|--------|
| USDC | 6 (Ethereum) | 6 | 6 |
| WETH | 18 (Ethereum) | 18 | 9 (capped) |
| wNEAR | 24 (NEAR) | 24 | 9 (capped) |
| ZEC | 8 (Zcash) | 8 | 8 |

When bridging tokens, amounts must be converted between these precisions. Small amounts can round to zero during conversion — and a zero-amount transfer fails.

## Example: The Dust Problem

Suppose you try to bridge 0.0000001 USDC from NEAR (6 decimals) to Solana (6 decimals), but with a very small fee:
Suppose you try to bridge a tiny amount of wNEAR from NEAR (24 decimals) to Ethereum (18 decimals):

```typescript
// wNEAR bridged to Ethereum: 24 decimals → 18 decimals
// On NEAR: 0.0000001 wNEAR = 100000000000000000 (24 decimals)
// Converted to Ethereum: rounds down to 10000000000 (18 decimals)
// If this is smaller than fees, transfer fails
// Converted to Ethereum: 100000000000 (18 decimals) = 0.0000001 wNEAR
// If amount after fees is too small, transfer fails
```

This is called "dust" — amounts so small they disappear during conversion.
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