tokenbridge/commons/utils.js
2019-07-24 11:50:35 -03:00

63 lines
1.6 KiB
JavaScript

const { BRIDGE_MODES, FEE_MANAGER_MODE } = require('./constants')
function decodeBridgeMode(bridgeModeHash) {
switch (bridgeModeHash) {
case '0x92a8d7fe':
return BRIDGE_MODES.NATIVE_TO_ERC
case '0xba4690f5':
return BRIDGE_MODES.ERC_TO_ERC
case '0x18762d46':
return BRIDGE_MODES.ERC_TO_NATIVE
case '0x2544fbb9':
return BRIDGE_MODES.ARBITRARY_MESSAGE
default:
throw new Error(`Unrecognized bridge mode hash: '${bridgeModeHash}'`)
}
}
const decodeFeeManagerMode = managerModeHash => {
switch (managerModeHash) {
case '0xf2aed8f7':
return FEE_MANAGER_MODE.ONE_DIRECTION
case '0xd7de965f':
return FEE_MANAGER_MODE.BOTH_DIRECTIONS
default:
throw new Error(`Unrecognized fee manager mode hash: '${managerModeHash}'`)
}
}
async function getBridgeMode(contract) {
try {
const bridgeModeHash = await contract.methods.getBridgeMode().call()
return decodeBridgeMode(bridgeModeHash)
} catch (e) {
return BRIDGE_MODES.NATIVE_TO_ERC_V1
}
}
const getUnit = bridgeMode => {
let unitHome = null
let unitForeign = null
if (bridgeMode === BRIDGE_MODES.NATIVE_TO_ERC) {
unitHome = 'Native coins'
unitForeign = 'Tokens'
} else if (bridgeMode === BRIDGE_MODES.ERC_TO_ERC) {
unitHome = 'Tokens'
unitForeign = 'Tokens'
} else if (bridgeMode === BRIDGE_MODES.ERC_TO_NATIVE) {
unitHome = 'Native coins'
unitForeign = 'Tokens'
} else {
throw new Error(`Unrecognized bridge mode: ${bridgeMode}`)
}
return { unitHome, unitForeign }
}
module.exports = {
decodeBridgeMode,
decodeFeeManagerMode,
getBridgeMode,
getUnit
}