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Update eip-1577.md

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@ -42,6 +42,8 @@ When resolving a `contenthash`, applications MUST use the protocol code to deter
### Example
#### IPFS
Input data:
```
@ -65,6 +67,35 @@ Text format:
ipfs://QmRAQB6YaCyidP37UdDnjFY5vQuiBrcqdyoW1CuDgwxkD4
```
### Swarm
Input data:
```
storage system: Swarm (0xe4)
CID version: 1 (0x01)
content type: swarm-manifest (0xfa)
hash function: keccak256 (0x1b)
hash length: 32 bytes (0x20)
hash: d1de9994b4d039f6548d191eb26786769f580809256b4685ef316805265ea162
```
Binary format:
```
0xe40101fa011b20d1de9994b4d039f6548d191eb26786769f580809256b4685ef316805265ea162
```
Text format:
```
bzz://d1de9994b4d039f6548d191eb26786769f580809256b4685ef316805265ea162
```
Example usage with swarm hash:
```
$ swarm hash ens contenthash d1de9994b4d039f6548d191eb26786769f580809256b4685ef316805265ea162
> e40101fa011b20d1de9994b4d039f6548d191eb26786769f580809256b4685ef316805265ea162
```
### Fallback
In order to support names that have an IPFS or Swarm hash in their `content` field, a grace period MUST be implemented offering those name holders time to update their names. If a resolver does not support the `multihash` interface, it MUST be checked whether they support the `content` interface. If they do, the value of that field SHOULD be treated in a context dependent fashion and resolved. This condition MUST be enforced until at least March 31st, 2019.