41 lines
1.2 KiB
JavaScript
41 lines
1.2 KiB
JavaScript
let beforeESBiggestBlockNumber = 0
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/**
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*
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* Returns true if the event was before the Emergency Shutdown.
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* The method has an optimization to avoid making request if a bigger block number is confirmed
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* to be before the ES. Events should be iterated from newer to older order to use the optimization.
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*/
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async function transferBeforeES(event, web3Foreign, foreignBridge) {
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const { blockNumber } = event
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if (blockNumber < beforeESBiggestBlockNumber) {
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return true
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}
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const block = await web3Foreign.eth.getBlock(blockNumber)
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const tokenSwapAllowed = await foreignBridge.methods.isTokenSwapAllowed(block.timestamp).call()
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if (tokenSwapAllowed) {
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beforeESBiggestBlockNumber = blockNumber
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}
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return tokenSwapAllowed
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}
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async function filterTransferBeforeES(array, web3Foreign, foreignBridge) {
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const newArray = []
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// Iterate events from newer to older
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for (let i = array.length - 1; i >= 0; i--) {
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const beforeES = await transferBeforeES(array[i], web3Foreign, foreignBridge)
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if (beforeES) {
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// add element to first position so the new array will have the same order
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newArray.unshift(array[i])
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}
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}
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return newArray
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}
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module.exports = {
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filterTransferBeforeES
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}
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