Definition: [
    "autonomous agent",
    {
        "init": "{
        $ASSET = 'hd936lRtPN11pkgNv8qVnqN2OHMyAp8P/NsLp6KsuqA=';
        $BYTE_INP = 10000;
        $FEE_LIMIT = 3000;//byte limit where AA starts paying trigger unit commissions
        $ADDR= 'a';$PERM = 'p';$BYTE='b';$TOTAL='total_bytes';$STO='last_storage_size';$LAST='last_address';
        $base = trigger.output[[asset=base]];if($base != $BYTE_INP) bounce('Only '||$BYTE_INP||' byte transaction allowed');
        $trigger_cost = unit[trigger.unit].headers_commission + unit[trigger.unit].payload_commission;
        $addr = trigger.address;
        $last_addr = var[$LAST];
        $balance = balance[base] - $base;
        $free_mode = ($balance - var[$TOTAL]) > $FEE_LIMIT;
        $addr_key = $ADDR||$addr;
        $addr_q = var[$addr_key];
        $byte_key = $BYTE ||$addr;
        $last_key = $BYTE ||$last_addr;
        $base_inp = $base+($free_mode?$trigger_cost:0);
        $value = trigger.data.value;
        if(!trigger.data.approve AND $value AND (typeof($value) != 'number' OR $value <= 0)) bounce('Value param invalid');
        $last_storage_size = var[$STO] otherwise 0;//last execution storage size
        $storage_size = storage_size;//actual storage size
        $diff_st = $storage_size - $last_storage_size;
        $update_st = $diff_st != 0;
    }",
        "messages": {
            "cases": [
                {
                    "if": "{
                    trigger.data.approve
                }",
                    "init": "{
                    $approve = trigger.data.approve;
                    $perm_key = $PERM || $addr || $approve;
                    if(!is_valid_address($approve) OR $approve == $addr) bounce('approve param invalid, specify address to approve instead of any other value');
                    if(!$value) bounce('Value param missing');
                    if(typeof($value) != 'number' OR $value < 0) bounce('Value param invalid');
                }",
                    "messages": [
                        {
                            "app": "state",
                            "state": "{
                            var[$perm_key] = $value;
                            if(var[$perm_key] == 0) var[$perm_key] = false;
                            var[$byte_key] += $base_inp;
                            var[$TOTAL] += $base_inp;
                            if($update_st){ var[$last_key] -= $diff_st; var[$STO] = $storage_size;}
                            var[$LAST] = $addr;
                            response['message'] = 'Approved '||$approve||' to spend '||$value ||' from your account';
                        }"
                        }
                    ]
                },
                {
                    "if": "{
                    trigger.data.withdraw_bytes
                }",
                    "init": "{
                    
                    $w_amount = var[$byte_key];
                    if(!$w_amount) bounce('No bytes to withdraw');
                    if($balance < $w_amount) bounce('Not enough bytes to withdraw');
                    $wt = round($w_amount / $BYTE_INP);
                    $w_fee = ($wt > 2) ? 462+$wt*60:522;
                    $diff = ($update_st AND $last_addr == $addr) ? $diff_st : 0;
                }",
                    "messages": [
                        {
                            "app": "payment",
                            "payload": {
                                "asset": "base",
                                "outputs": [
                                    {
                                        "address": "{$addr}",
                                        "amount": "{$w_amount+$base_inp-$diff-$w_fee}"
                                    }
                                ]
                            }
                        },
                        {
                            "app": "state",
                            "state": "{
                            var[$byte_key] = false;
                            var[$TOTAL] -=  $w_amount;
                            if(var[$TOTAL] == 0) var[$TOTAL] = false;
                            if($update_st AND $last_addr != $addr){ var[$last_key] -= $diff_st; }
                            var[$STO] = $storage_size-37;//gain some bytes
                            response['message'] = 'Withdrawn '||$w_amount||' bytes less fee of'||$w_fee||' from your account';
                        }"
                        }
                    ]
                },
                {
                    "if": "{
                    trigger.data.deposit
                }",
                    "init": "{
                    if(trigger.output[[asset!=base]].asset != 'none')
                        $asset = trigger.output[[asset!=base]].asset;
                    else
                        bounce('You must deposit '||$ASSET);
                    if($asset == 'ambiguous') bounce('Only 1 asset per tx');
                    if($asset != $ASSET) bounce('You must deposit '||$ASSET);
                    $asset_inp = trigger.output[[asset!=base]];
                }",
                    "messages": [
                        {
                            "app": "state",
                            "state": "{
                            var[$addr_key] += $asset_inp;
                            var[$byte_key] += $base_inp;
                            var[$TOTAL] += $base_inp;
                            if($update_st){ var[$last_key] -= $diff_st; var[$STO] = $storage_size;}
                            var[$LAST] = $addr;
                            response['message'] = 'Added '||$asset_inp||' to your account';
                        }"
                        }
                    ]
                },
                {
                    "if": "{
                    trigger.data.withdraw
                }",
                    "init": "{
                    if(!$addr_q) bounce('Nothing to withdraw');
                    $max_w = $addr_q-($addr_q % 1);
                    if(!$value) bounce('Value param missing, max to withdraw '||$max_w) ;
                    $w_amount = $value - ($value % 1);
                    
                    if($w_amount <= 0) bounce('Max to withdraw '||$max_w);
                    if($w_amount > $max_w) bounce('Not enough asset, max to withdraw '||$max_w);
                }",
                    "messages": [
                        {
                            "app": "payment",
                            "payload": {
                                "asset": "{$ASSET}",
                                "outputs": [
                                    {
                                        "address": "{$addr}",
                                        "amount": "{$w_amount}"
                                    }
                                ]
                            }
                        },
                        {
                            "app": "state",
                            "state": "{
                            $w_fee = unit[response_unit].headers_commission + unit[response_unit].payload_commission;
                            var[$addr_key] -= $w_amount;
                            if(var[$addr_key] == 0) var[$addr_key]=false;
                            var[$byte_key] += $base_inp-$w_fee;
                            var[$TOTAL] += $base_inp-$w_fee;
                            if($update_st){ var[$last_key]-=$diff_st; var[$STO]=$storage_size;}
                            var[$LAST] = $addr;
                            response['message'] = 'Withdrawn '||$w_amount||' from your account';
                        }"
                        }
                    ]
                },
                {
                    "if": "{
                    trigger.data.transfer
                }",
                    "init": "{
                    $to = trigger.data.transfer;
                    if(!is_valid_address($to) OR $to == $addr) bounce('transfer param invalid, specify address to instead of any other value');
                    if(!$addr_q) bounce('No funds found');
                    if(!$value) bounce('Value param missing');
                    if($value > $addr_q) bounce('You have max '||$addr_q);
                }",
                    "messages": [
                        {
                            "app": "state",
                            "state": "{
                            var[$ADDR|| $to] += $value;
                            var[$addr_key] -= $value;
                            if(var[$addr_key] == 0) var[$addr_key] = false;
                            var[$byte_key] += $base_inp;
                            var[$TOTAL] += $base_inp;
                            if($update_st){ var[$last_key] -= $diff_st; var[$STO] = $storage_size;}
                            var[$LAST] = $addr;
                            response['message'] = 'Transferred '||$value||' to '||$to;
                        }"
                        }
                    ]
                },
                {
                    "if": "{
                    trigger.data.transfer_from
                }",
                    "init": "{
                    $from = trigger.data.transfer_from;
                    $to = trigger.data.to;
                    $from_key = $ADDR|| $from;
                    $perm_key = $PERM || $from || $addr;
                    if(!is_valid_address($from)) bounce('transfer_from param invalid, specify from address instead of any other value');
                    if(!$to) bounce('To param missing');
                    if(!is_valid_address($to)) bounce('To param invalid');
                    if(!var[$from_key]) bounce('Account have no funds');
                    if(!$value) bounce('Value param missing');
                    if(!var[$perm_key]) bounce('Not allowed to spend');
                    if(var[$perm_key] < $value) bounce('You can spend max '||var[$perm_key]);
                    if(var[$from_key] < $value) bounce('Account have '||var[$from_key]);
                }",
                    "messages": [
                        {
                            "app": "state",
                            "state": "{
                            var[$ADDR|| $to] += $value;
                            var[$from_key] -= $value;
                            if(var[$from_key] == 0) var[$from_key] = false;
                            var[$perm_key] -= $value;
                            if(var[$perm_key] == 0) var[$perm_key] = false;
                            var[$byte_key] += $base_inp;
                            var[$TOTAL] += $base_inp;
                            if($update_st){ var[$last_key] -= $diff_st; var[$STO] = $storage_size;}
                            var[$LAST] = $from;
                            response['message'] = 'Transferred '||$value||' to '||$to;
                        }"
                        }
                    ]
                },
                {
                    "messages": [
                        {
                            "app": "state",
                            "state": "{
                            if(trigger.output[[asset!=base]].asset != 'none') bounce('To deposit asset, use deposit param');
                            if($update_st){ var[$last_key] -= $diff_st; var[$STO] = $storage_size;}
                            var[$LAST] = $addr;
                            response['usage'] = 'Send param = 1 for continue.';
                            response['accepted_params'] = 'deposit, withdraw, transfer, transfer_from, approve, withdraw_bytes';
                            response['message'] = 'Received donation for funding AA operation, thaanks!';
                        }"
                        }
                    ]
                }
            ]
        }
    }
]