Reading Contract States

In this section, we will cover a few read operations that are useful from a delegator's perspective. These are:

In order to read the above information from the smart contract, you should use the GetSmartContractSubState API by querying it from the ssnlist smart contract.

Getting the Current List of SSNs

Inputs

  • Address of ssnlist smart contract
  • ssnlist
curl -d '{
"id": "1",
"jsonrpc": "2.0",
"method": "GetSmartContractSubState",
"params": ["<ssnlist contract address>","ssnlist",[]]
}' -H "Content-Type: application/json" -X POST "https://dev-api.zilliqa.com/"

Output

Map of SSN with the corresponding SSN data type

Map SSN address -> SSN data type

{
"id":"1",
"jsonrpc":"2.0",
"result":{
"ssnlist":{
"<ssn addr>":{
"argtypes":[
],
"arguments":[
{
"argtypes":[
],
"arguments":[
],
"constructor":"<ActiveStatus>"
},
"<StakeAmount>",
"<StakeRewards>",
"<name of ssn>",
"<staking api url>",
"<api url>",
"<buffered deposit>",
"<comission rate>",
"<commssion rewards>",
"<ssn commission receiving address>"
]
}
}
}
}

Getting the Delegator's Buffered Deposit

Inputs

  • Address of ssnlist smart contract
  • buff_deposit_deleg
  • Address of delegator

Example

curl -d '{
> "id": "1",
> "jsonrpc": "2.0",
> "method": "GetSmartContractSubState",
> "params": ["<ssnlist contract address>","buff_deposit_deleg",["0x<address of delegator>"]]
> }' -H "Content-Type: application/json" -X POST "<api endpoint>"

Output

Map of ssn address with the value being a map of cycle number and the buffered deposit at that particular cycle number

Map SSN addreess -> Map Cycle number buffered deposit amount in Qa

info

Cycle number refers to the cycle number of the smart contract when the deposit was submitted to buffered deposit.

Example

{"<ssn address>":{"<cycle number>":"<deposit amount>"}}

Getting the Delegator's Stake Amount

Inputs

  • Address of ssnlist smart contract
  • withdrawal_pending
  • Address of delegator

Example

curl -d '{
> "id": "1",
> "jsonrpc": "2.0",
> "method": "GetSmartContractSubState",
> "params": ["<ssn contract address>","deposit_amt_deleg",["<delegator address>"]]
> }' -H "Content-Type: application/json" -X POST "api endpoing"

Output

Map consisting of SSN address and the corresponding delegated amount for a particular delegator

Map ssn address -> delegated amount

{"<ssn addr>":"<delegated amount>",
"<ssn addr>":"<delegated amount>"}

Getting the Delegator's Stake Reward

Coming soon

Getting the Delegator's Reward History

Coming soon

Getting the Delegator's Pending Stake Withdrawal Request

Inputs

  • Address of ssnlist smart contract
  • deposit_amt_deleg
  • Address of delegator

Example

curl -d '{
"id": "1",
"jsonrpc": "2.0",
"method": "GetSmartContractSubState",
"params": ["<ssnlist contract address>","withdrawal_pending",["0x<address of delegator>"]]
}' -H "Content-Type: application/json" -X POST "<api endpoint>"

Output

Map consisting of the epoch number when the withdrawal was initiated and the corresponding amount to withdraw

Map epoch number -> Pending withdrawal amount

{"<epoch number>":"<amount (Qa) to be withdrawn>",
"<epoch number>":"<amount (Qa) to be withdrawn>"}

Getting Delegation History

Coming soon