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feat: add get allowance support for ERC20 tokens #312

Merged
merged 4 commits into from
Apr 8, 2024
Merged

feat: add get allowance support for ERC20 tokens #312

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35582c7
feat: add get allowance support
seaona Apr 8, 2024
5718424
small tweak with decimals
seaona Apr 8, 2024
9541ad0
fix extra space and order items
seaona Apr 8, 2024
dbc1440
Merge branch 'main' into get-allowance
seaona Apr 8, 2024
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30 changes: 29 additions & 1 deletion src/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -354,7 +354,7 @@ <h4 class="card-title">
>
Transfer Tokens
</button>

<hr />
<div class="form-group">
<label>Approve to Address</label>
<input
Expand All @@ -380,6 +380,33 @@ <h4 class="card-title">
Increase Token Allowance
</button>

<hr />
<div class="form-group">
<label>Owner Address</label>
<input
class="form-control"
id="allowanceOwner"
/>
</div>

<div class="form-group">
<label>Spender Address</label>
<input
class="form-control"
id="allowanceSpender"
/>
</div>
<button
class="btn btn-primary btn-lg btn-block mb-3"
id="getAllowance"
disabled
>
Get Allowance
</button>
<p class="info-text alert alert-secondary">
Allowance amount: <span id="allowanceAmountResult"></span>
</p>
<hr />
<div class="form-group">
<label>Transfer From</label>
<input
Expand All @@ -402,6 +429,7 @@ <h4 class="card-title">
>
Transfer From Tokens
</button>
<hr />
<button
class="btn btn-primary btn-lg btn-block mb-3"
id="transferTokensWithoutGas"
Expand Down
28 changes: 28 additions & 0 deletions src/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -167,6 +167,10 @@ const approveTokens = document.getElementById('approveTokens');
const increaseTokenAllowance = document.getElementById(
'increaseTokenAllowance',
);
const allowanceOwnerInput = document.getElementById('allowanceOwner');
const allowanceSpenderInput = document.getElementById('allowanceSpender');
const allowanceAmountResult = document.getElementById('allowanceAmountResult');
const getAllowance = document.getElementById('getAllowance');
const transferTokensWithoutGas = document.getElementById(
'transferTokensWithoutGas',
);
Expand Down Expand Up @@ -345,6 +349,10 @@ const allConnectedButtons = [
transferFromTokens,
approveTokens,
increaseTokenAllowance,
allowanceOwnerInput,
allowanceSpenderInput,
allowanceAmountResult,
getAllowance,
transferFromRecipientInput,
transferFromSenderInput,
transferTokensWithoutGas,
Expand Down Expand Up @@ -1068,6 +1076,10 @@ const updateContractElements = () => {
transferFromTokens.disabled = false;
approveTokens.disabled = false;
increaseTokenAllowance.disabled = false;
allowanceOwnerInput.disabled = false;
allowanceSpenderInput.disabled = false;
allowanceAmountResult.disabled = false;
getAllowance.disabled = false;
transferTokensWithoutGas.disabled = false;
approveTokensWithoutGas.disabled = false;
transferFromSenderInput.disabled = false;
Expand Down Expand Up @@ -1748,6 +1760,10 @@ const initializeFormElements = () => {
transferFromTokens.disabled = false;
approveTokens.disabled = false;
increaseTokenAllowance.disabled = false;
allowanceOwnerInput.disabled = false;
allowanceSpenderInput.disabled = false;
allowanceAmountResult.disabled = false;
getAllowance.disabled = false;
transferTokensWithoutGas.disabled = false;
approveTokensWithoutGas.disabled = false;
approveTokensToInput.disabled = false;
Expand Down Expand Up @@ -1807,6 +1823,18 @@ const initializeFormElements = () => {
console.log('result', result);
};

getAllowance.onclick = async () => {
const result = await hstContract.allowance(
allowanceOwnerInput.value,
allowanceSpenderInput.value,
{ from: accounts[0] },
);
const allowance = result.toNumber() / 10 ** decimalUnitsInput.value;
allowanceAmountResult.innerHTML = allowance.toFixed(
decimalUnitsInput.value,
);
};

transferFromTokens.onclick = async () => {
try {
const result = await hstContract.transferFrom(
Expand Down
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