Algorithms

Example

letcoinSelect=require('coinselect')letfeeRate=55// satoshis per byteletutxos=[  ...,{txId:'...',vout:0,    ...,value:10000,// For use with PSBT:// not needed for coinSelect, but will be passed on to inputs laternonWitnessUtxo:Buffer.from('...full raw hex of txId tx...','hex'),// OR// if your utxo is a segwit output, you can use witnessUtxo insteadwitnessUtxo:{script:Buffer.from('... scriptPubkey hex...','hex'),value:10000// 0.0001 BTC and is the exact same as the value above}}]lettargets=[  ...,{address:'1EHNa6Q4Jz2uvNExL497mE43ikXhwF6kZm',value:5000}]// ...let{ inputs, outputs, fee}=coinSelect(utxos,targets,feeRate)// the accumulated fee is always returned for analysisconsole.log(fee)// .inputs and .outputs will be undefined if no solution was foundif(!inputs||!outputs)returnletpsbt=newbitcoin.Psbt()inputs.forEach(input=>psbt.addInput({hash:input.txId,index:input.vout,nonWitnessUtxo:input.nonWitnessUtxo,// OR (not both)witnessUtxo:input.witnessUtxo,}))outputs.forEach(output=>{// watch out, outputs may have been added that you need to provide// an output address/script forif(!output.address){output.address=wallet.getChangeAddress()wallet.nextChangeAddress()}psbt.addOutput({address:output.address,value:output.value,})})

LicenseMIT