Differential D12097 Diff 35659 web/cashtab/src/utils/cashMethods.js

Changeset View

Standalone View

web/cashtab/src/utils/cashMethods.js

Show First 20 Lines • Show All 91 Lines • ▼ Show 20 Lines	) => {
}		}
txInputObj.txBuilder = txBuilder;		txInputObj.txBuilder = txBuilder;
txInputObj.totalInputUtxoValue = totalInputUtxoValue;		txInputObj.totalInputUtxoValue = totalInputUtxoValue;
txInputObj.inputUtxos = inputUtxos;		txInputObj.inputUtxos = inputUtxos;
txInputObj.txFee = txFee;		txInputObj.txFee = txFee;
return txInputObj;		return txInputObj;
};		};

		export const generateTokenTxInput = (
		BCH,
		tokenAction, // GENESIS, SEND or BURN
		totalXecUtxos,
		totalTokenUtxos,
		tokenId,
		tokenAmount, // optional - only for sending or burning
		feeInSatsPerByte,
		txBuilder,
		) => {
		let totalXecInputUtxoValue = new BigNumber(0);
		let remainderXecValue = new BigNumber(0);
		let remainderTokenValue = new BigNumber(0);
		let totalXecInputUtxos = [];
		let txFee = 0;
		const { calcFee } = useBCH();
		let tokenUtxosBeingSpent = [];

		try {
		if (
		!BCH \|\|
		!tokenAction \|\|
		!totalXecUtxos \|\|
		!tokenId \|\|
		!feeInSatsPerByte \|\|
		!txBuilder
		) {
		throw new Error('Invalid token tx input parameter');
		}

		// collate XEC UTXOs for this token tx
		const txOutputs =
		tokenAction === 'GENESIS'
		? 2 // one for genesis OP_RETURN output and one for change
		: 4; // for SEND/BURN token txs see T2645 on why this is not dynamically generated
		for (let i = 0; i < totalXecUtxos.length; i++) {
		const thisXecUtxo = totalXecUtxos[i];
		totalXecInputUtxoValue = totalXecInputUtxoValue.plus(
		new BigNumber(thisXecUtxo.value),
		);
		const vout = thisXecUtxo.outpoint.outIdx;
		const txid = thisXecUtxo.outpoint.txid;
		// add input with txid and index of vout
		txBuilder.addInput(txid, vout);

		totalXecInputUtxos.push(thisXecUtxo);
		txFee = calcFee(
		BCH,
		totalXecInputUtxos,
		txOutputs,
		feeInSatsPerByte,
		);

		remainderXecValue =
		tokenAction === 'GENESIS'
		? totalXecInputUtxoValue
		.minus(new BigNumber(currency.etokenSats))
		.minus(new BigNumber(txFee))
		: totalXecInputUtxoValue
		.minus(new BigNumber(currency.etokenSats * 2)) // one for token send/burn output, one for token change
		.minus(new BigNumber(txFee));

		if (remainderXecValue.gte(0)) {
		break;
		}
		}

		if (remainderXecValue.lt(0)) {
		throw new Error(`Insufficient funds`);
		}

		let filteredTokenInputUtxos = [];
		let finalTokenAmountSpent = new BigNumber(0);
		let tokenAmountBeingSpent = new BigNumber(tokenAmount);

		if (tokenAction === 'SEND' \|\| tokenAction === 'BURN') {
		// filter for token UTXOs matching the token being sent/burnt
		filteredTokenInputUtxos = totalTokenUtxos.filter(utxo => {
		if (
		utxo && // UTXO is associated with a token.
		utxo.slpMeta.tokenId === tokenId && // UTXO matches the token ID.
		!utxo.slpToken.isMintBaton // UTXO is not a minting baton.
		) {
		return true;
		}
		return false;
		});
		if (filteredTokenInputUtxos.length === 0) {
		throw new Error(
		'No token UTXOs for the specified token could be found.',
		);
		}

		// collate token UTXOs to cover the token amount being sent/burnt
		for (let i = 0; i < filteredTokenInputUtxos.length; i++) {
		finalTokenAmountSpent = finalTokenAmountSpent.plus(
		new BigNumber(filteredTokenInputUtxos[i].tokenQty),
		);
		txBuilder.addInput(
		filteredTokenInputUtxos[i].outpoint.txid,
		filteredTokenInputUtxos[i].outpoint.outIdx,
		);
		tokenUtxosBeingSpent.push(filteredTokenInputUtxos[i]);
		if (tokenAmountBeingSpent.lte(finalTokenAmountSpent)) {
		break;
		}
		}

		// calculate token change
		remainderTokenValue = finalTokenAmountSpent.minus(
		new BigNumber(tokenAmount),
		);
		if (remainderTokenValue.lt(0)) {
		throw new Error(
		'Insufficient token UTXOs for the specified token amount.',
		);
		}
		}
		} catch (err) {
		console.log(`generateTokenTxInput() error: ` + err);
		throw err;
		}

		return {
		txBuilder: txBuilder,
		inputXecUtxos: totalXecInputUtxos,
		inputTokenUtxos: tokenUtxosBeingSpent,
		remainderXecValue: remainderXecValue,
		remainderTokenValue: remainderTokenValue,
		};
		};

export const getChangeAddressFromInputUtxos = (BCH, inputUtxos, wallet) => {		export const getChangeAddressFromInputUtxos = (BCH, inputUtxos, wallet) => {
if (!BCH \|\| !inputUtxos \|\| !wallet) {		if (!BCH \|\| !inputUtxos \|\| !wallet) {
throw new Error('Invalid getChangeAddressFromWallet input parameter');		throw new Error('Invalid getChangeAddressFromWallet input parameter');
}		}

// Assume change address is input address of utxo at index 0		// Assume change address is input address of utxo at index 0
let changeAddress;		let changeAddress;

▲ Show 20 Lines • Show All 725 Lines • Show Last 20 Lines