export pool_contract=dev-1691760216493-83287990439185
export elearning_contract=dev-1691760282672-35222846508853
near state dev-1691760216493-83287990439185
near call $elearning_contract create_pool '{"param" : false}' --account-id eamondangdev.testnet
near call $pool_contract stake "{\"elearning_id\": \"$elearning_contract\", \"amount\":1, \"param\": false}" --account-id eamondangdev.testnet --amount 8
signer =>
predesecsor =>
A => B signer = A predesecsor = A
A => B => C signer A pre B
A => B => C => D signer A pre C => B pre D => C
near view $pool_contract view_count