67 lines
1.7 KiB
JavaScript
67 lines
1.7 KiB
JavaScript
export function handle(state, action) {
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const balances = state.balances;
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const canEvolve = state.canEvolve;
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const input = action.input;
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const caller = action.caller;
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if (input.function === 'transfer') {
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const target = input.target;
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const qty = input.qty;
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if (!Number.isInteger(qty)) {
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throw new ContractError('Invalid value for "qty". Must be an integer');
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}
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if (!target) {
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throw new ContractError('No target specified');
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}
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if (qty <= 0 || caller === target) {
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throw new ContractError('Invalid token transfer');
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}
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if (balances[caller] < qty) {
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throw new ContractError(`Caller balance not high enough to send ${qty} token(s)!`);
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}
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// Lower the token balance of the caller
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balances[caller] -= qty;
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if (target in balances) {
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// Wallet already exists in state, add new tokens
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balances[target] += qty;
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} else {
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// Wallet is new, set starting balance
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balances[target] = qty;
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}
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return { state };
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}
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if (input.function === 'balance') {
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const target = input.target;
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const ticker = state.ticker;
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if (typeof target !== 'string') {
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throw new ContractError('Must specify target to get balance for');
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}
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if (typeof balances[target] !== 'number') {
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throw new ContractError('Cannot get balance, target does not exist');
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}
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return { result: { target, ticker, balance: balances[target] + 555 } };
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}
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if (input.function === 'evolve' && canEvolve) {
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if (state.owner !== caller) {
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throw new ContractError('Only the owner can evolve a contract.');
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}
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state.evolve = input.value;
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return { state };
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}
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throw new ContractError(`No function supplied or function not recognised: "${input.function}"`);
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}
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