使用coinmarketcap提供的API接口获取币种供应量和流通量，可用于计算总市值
function GetSupply(symbol, max){
var ids = null
if(_G('ids')){
ids = _G('ids')
}else{
ids = JSON.parse(HttpQuery('https://api.coinmarketcap.com/v2/listings/')).data
_G('ids', ids)
}
var coinId = null
for (var i=0; i<ids.length; i++){
if(ids[i].symbol.toLowerCase() == symbol.toLowerCase() ){
coinId = ids[i].id
break
}
}
if(coinId){
var ticker = JSON.parse(HttpQuery('https://api.coinmarketcap.com/v2/ticker/'+ coinId + '/')).data
return parseFloat(max == undefined ? ticker.total_supply: ticker.max_supply)
}else{
throw 'symbol not found'
}
}
function main() {
Log(GetSupply('BTC')) // Get total current supply
Log(GetSupply('BTC', true)) // Get max supply
}