サイクルXXXのシードはまだ計算されていません

メインネットでは、最大5サイクル前にベーキング権を取得できます.

たとえば、現在、サイクル146を実行しており、次のことを確認しています.

 # returns succesfully:
./tezos-client -A mainnet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=151

# returns an error:
/tezos-client -A mainnet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=152
 

エラーはThe seed for cycle 152 has not been computed yet (latest known seed is for cycle 151)です.つまり、シードは5サイクル前に計算されます.

アルファネット(現在のサイクル:315)で、同じ実験は、シードが3サイクル前にのみ計算されることを示しています:

 # Works:
./tezos-client -A alphanet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=318

# returns an error:
./tezos-client -A alphanet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=319
 

なぜ違うのですか?

On the mainnet, I can get the baking rights up to 5 cycles in advance.

For example, we are currently on cycle 146, and I observe the following:

# returns succesfully:
./tezos-client -A mainnet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=151

# returns an error:
/tezos-client -A mainnet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=152

The error is The seed for cycle 152 has not been computed yet (latest known seed is for cycle 151). That is, the seed is computed 5 cycles in advance.

On the alphanet (current cycle: 315), same experiment shows that the seed is only computed 3 cycles in advance:

# Works:
./tezos-client -A alphanet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=318

# returns an error:
./tezos-client -A alphanet-node.tzscan.io  rpc get /chains/main/blocks/head/helpers/baking_rights?cycle=319

Why is it different ?