This section explains how users can earn a yield on their digital assets by depositing their assets in different vaults.
Step 1: Check the allowance of the vault for the token that the user wants to deposit.
API URL:
https://api.expand.network/fungibletoken/getuserallowance
Sample Request:
https://api.expand.network/fungibletoken/getuserallowance?owner=0x6Fb447Ae94F5180254D436A693907a1f57696900&tokenAddress=0x6b175474e89094c44da98b954eedeac495271d0f&spender=0xBA12222222228d8Ba445958a75a0704d566BF2C8
Sample Response:
{
"status": 200,
"msg": "success",
"data": {
"allowance": "999000000000000000000"
}
}
Step 2: Approve the vault contract from the token
If the allowance is less than the token amount to deposit, the user must approve the vault contract from the token.
This can be done using the following API endpoint:
API URL:
https://api.expand.network/fungibletoken/approve
Sample Request:
{
"from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
"tokenAddress":"0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
"amount": "1000000000000000000000",
"to": "0x828b154032950c8ff7cf8085d841723db2696056",
"gas": "100000",
"chainId": "1"
}
Sample Response:
{
"status": 200,
"msg": "success",
"data": {
"from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
"to": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
"value": "0",
"gas": "100000",
"data": "0x095ea7b3000000000000000000000000828b154032950c8ff7cf8085d841723db269605600000000000000000000000000000000000000000000003635c9adc5dea00000"
}
}
Step 3: Deposit
This can be done using the following API endpoint:
API URL:
https://api.expand.network/yieldaggregator/depositvault
Sample Request:
{
"from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
"tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
"amount": "500000",
"gas": "2307200",
"yieldAggregatorId": "5100"
}
Sample Response:
{
"status": 200,
"msg": "success",
"data": {
"from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
"to": "0xFE09e53A81Fe2808bc493ea64319109B5bAa573e",
"value": "0",
"gas": "2307200",
"data": "0xb6b55f25000000000000000000000000000000000000000000000000000000000007a120"
}
}
The user will receive the LP tokens on depositing the token.
Step 4: Withdraw
The user needs to provide the LP tokens to withdraw. To provide the LP tokens to the vault, the vault needs to be approved by the LP token.
This can be done using the following API endpoint:
API URL: https://api.expand.network/yieldaggregator/withdrawvault
Sample Request:
{
"from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
"tokenAddress": "0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2",
"amount": "500000",
"gas": "2307200",
"yieldAggregatorId": "5100"
}
Sample Response:
{
"status": 200,
"msg": "success",
"data": {
"from": "0x63056E00436Da25BcF48A40dfBbDcc7089351006",
"to": "0xFE09e53A81Fe2808bc493ea64319109B5bAa573e",
"value": "0",
"gas": "2307200",
"data": "0x2e1a7d4d00000000000000000000000000000000000000000000000000000000004b4a52"
}
}
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