Added a README for Sifchain.

auracheeze · auracheeze · commit edf2d417da65 · 2022-02-21T23:48:54.000+08:00
diff --git a/sifchain/README.md b/sifchain/README.md
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+# Sifchain
+
+- The mainnet for Sifchain is called BetaNet, and the testnet TestNet.
+- Snapshots are only available for BetaNet and only for **non-archive** nodes. (https://github.com/Sifchain/sifchain-validators/blob/master/docs/nodes/setup/standalone/manual.md#snapshot)
