How do I send BTC from two (or more addresses) to a single address in a send? I mainly use block cypher.
I use this BC-API: https://api.blockcypher.com/v1/btc/test3/txs/new (document at https://www.blockcypher.com/dev/bitcoin/?javascript#creating-transactions)
I post this data:
var sendobj = new Object();
dest_addr = 'mj2ExyCmynjJXW2faTK6xjVqx57umJbH8B';
sendobj.preference = "low";
sendobj.inputs = (
{ addresses: ( "mp6Uhfwt9VA9Nvop6UepQkMS943C8gC46i" ) },
{ addresses: ( "mgGSEb4WHGydeYJLnMJmE3NaRZhmyy8AyA" ) }
);
sendobj.outputs = (
{ addresses: ( dest_addr ), value: 73000 },
{ addresses: ( dest_addr ), value: 5000 }
);
xhr.send( JSON.stringify( sendobj ) );
Source address info:
I get an answer:
{
"tx": {
"block_height": -1,
"block_index": -1,
"hash": "b3750f0a98c8a4a146e319b6cdbfd748f4c260a2329e620e081b5588c8ccd205",
"addresses": (
"mp6Uhfwt9VA9Nvop6UepQkMS943C8gC46i",
"mgGSEb4WHGydeYJLnMJmE3NaRZhmyy8AyA",
"mj2ExyCmynjJXW2faTK6xjVqx57umJbH8B"
),
"total": 84500,
"fees": 8500,
"size": 235,
"preference": "medium",
"relayed_by": "172.58.139.33",
"received": "2020-02-14T15:58:08.733878354Z",
"ver": 1,
"double_spend": false,
"vin_sz": 3,
"vout_sz": 3,
"confirmations": 0,
"inputs": (
{
"prev_hash": "975a47e91dbb2dc0501b58be073bccf45aa026689f189fb9a30356acd78b1d3f",
"output_index": 0,
"output_value": 10000,
"sequence": 4294967295,
"addresses": (
"mp6Uhfwt9VA9Nvop6UepQkMS943C8gC46i"
),
"script_type": "pay-to-pubkey-hash",
"age": 1665844
},
{
"prev_hash": "0ff3833ec9d9c1fa11131e6e641242af02efd897b223ab45419484bfa9296b9d",
"output_index": 1,
"output_value": 73000,
"sequence": 4294967295,
"addresses": (
"mp6Uhfwt9VA9Nvop6UepQkMS943C8gC46i"
),
"script_type": "pay-to-pubkey-hash",
"age": 1665845
},
{
"prev_hash": "0ff3833ec9d9c1fa11131e6e641242af02efd897b223ab45419484bfa9296b9d",
"output_index": 0,
"output_value": 10000,
"sequence": 4294967295,
"addresses": (
"mgGSEb4WHGydeYJLnMJmE3NaRZhmyy8AyA"
),
"script_type": "pay-to-pubkey-hash",
"age": 1665845
}
),
"outputs": (
{
"value": 73000,
"script": "76a91426725b41137c344b8efc01070167fe61ca6de91888ac",
"addresses": (
"mj2ExyCmynjJXW2faTK6xjVqx57umJbH8B"
),
"script_type": "pay-to-pubkey-hash"
},
{
"value": 5000,
"script": "76a91426725b41137c344b8efc01070167fe61ca6de91888ac",
"addresses": (
"mj2ExyCmynjJXW2faTK6xjVqx57umJbH8B"
),
"script_type": "pay-to-pubkey-hash"
},
{
"value": 6500,
"script": "76a9145e181d9ca3ddac3d6642a4500a2e92b01d2a630c88ac",
"addresses": (
"mp6Uhfwt9VA9Nvop6UepQkMS943C8gC46i"
),
"script_type": "pay-to-pubkey-hash"
}
)
},
"tosign": (
"0b75c526479337a300fe59dd16eb3573efc68fa89b9da961b32065e3729cd8e1",
"de1a63b82312752a47022b3d4b143c075a8d3b345499885e046cd7eb3c31e94a",
"50d018baaf5b9dd4862f1aa2c95a2803a662c4a866f737499e319ad3a307f12f"
)
}
Why are 3 signatures required and not 2? Am I properly setting up the initial shipment to do what I want? Why is mgGSEb4WHGydeYJLnMJmE3NaRZhmyy8AyA not in the output (for change)